The classical-quantum boundary for correlations: discord and related measures

Abstract

One of the best signatures of nonclassicality in a quantum system is the existence of correlations that have no classical counterpart. Different methods for quantifying the quantum and classical parts of correlations are amongst the more actively-studied topics of quantum information theory over the past decade. Entanglement is the most prominent of these correlations, but in many cases unentangled states exhibit nonclassical behavior too. Thus distinguishing quantum correlations other than entanglement provides a better division between the quantum and classical worlds, especially when considering mixed states. Here we review different notions of classical and quantum correlations quantified by quantum discord and other related measures. In the first half, we review the mathematical properties of the measures of quantum correlations, relate them to each other, and discuss the classical-quantum division that is common among them. In the second half, we show that the measures identify and quantify the deviation from classicality in various quantum-information-processing tasks, quantum thermodynamics, open-system dynamics, and many-body physics. We show that in many cases quantum correlations indicate an advantage of quantum methods over classical ones.

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• Maximally dense coding capable quantum states
• Quantum Correlations beyond Entanglement and Discord
• Daemonic ergotropy: generalised measurements and multipartite settings
• Quantumness and memory of one qubit in a dissipative cavity under classical control
• Overview on the phenomenon of two-qubit entanglement revivals in classical environments
• Collapse-revival of quantum discord and entanglement
• Computing complexity measures for quantum states based on exponential families
• Experimental localisation of quantum entanglement through monitored classical mediator
• Photonic multipartite entanglement conversion using nonlocal operations
• Can communication power of separable correlations exceed that of entanglement resource?
• Quantum information
• Flag Additivity in Quantum Resource Theories
• Non-Markovian quantum control as coherent stochastic trajectories
• Dynamical quantum correlations after sudden quenches
• Limits on sequential sharing of nonlocal advantage of quantum coherence
• Quantum Darwinism in a composite system: Objectivity versus classicality
• Experimental detection of polarization-frequency quantum correlations in a photonic quantum channel by local operations
• Observing a Quantum Phase Transition by Measuring a Single Spin
• Investigating Einstein-Podolsky-Rosen steering of continuous variable bipartite states by non-Gaussian pseudospin measurements
• Overarching framework between Gaussian quantum discord and Gaussian quantum illumination
• Quantum correlations, separability and quantum coherence length in equilibrium many-body systems
• Device-independent quantum reading and noise-assisted quantum transmitters
• Steady-state entanglement activation in optomechanical cavities
• Characterizing correlation within multipartite quantum systems via local randomized measurements
• Thermodynamics of quantum feedback cooling
• Quantum correlation entropy
• Bayes' rule, generalized discord, and nonextensive thermodynamics
• Entanglement and deterministic quantum computing with one qubit
• Redundantly amplified information suppresses quantum correlations in many-body systems
• Extracting entanglement geometry from quantum states
• Sequential sharing of two-qudit entanglement based on the entropic uncertainty relation
• Local quantum uncertainty for multipartite quantum systems
• Fermionic Entanglement in Superconducting Systems
• Of Local Operations and Physical Wires
• Static and dynamical quantum correlations in phases of an alternating field XY model
• Non-zero total correlation means non-zero quantum correlation
• Non-commutativity and Local Indistinguishability of Quantum States
• Gaussian Discriminating Strength
• Sudden change of geometric quantum discord in finite temperature reservoirs
• Quantum information as a non-Kolmogorovian generalization of Shannon's theory
• Creating mirror-mirror quantum correlations in optomechanics
• Quantum Operations in an Information Theory for Fermions
• Genuine Distributed Coherence
• Quantum correlation exists in any non-product state
• Constructive Feedback of Non-Markovianity on Resources in Random Quantum States
• Invariant Quantum Discord in Qubit-Qutrit Systems under Local Dephasing
• Phonon-mediated generation of quantum correlations between quantum dot qubits
• Statistical Model of the Early Stage of nucleus-nucleus collisions with exact strangeness conservation
• Quantum correlation measure in arbitrary bipartite systems
• Quantifying quantum coherence in polariton condensates
• Quantum discord in nuclear magnetic resonance systems at room temperature
• Discord of response
• Overcoming ambiguities in classical and quantum correlation measures
• Retrieving the lost fermionic entanglement by partial measurement in noninertial frames
• Resource theory of superposition: State transformations
• Quantum Reversibility Is Relative, Or Do Quantum Measurements Reset Initial Conditions?
• Generic features of the dynamics of complex open quantum systems: Statistical approach based on averages over the unitary group
• Local Quantum Uncertainty in Two-Qubit Separable States: A Case Study
• Computing partial traces and reduced density matrices
• One-way Quantum Deficit and Decoherence for Two-qubit $X$ States
• Witnessing quantum resource conversion within deterministic quantum computation using one pure superconducting qubit
• Time-evolution of entanglement and quantum discord of bipartite systems subject to 1/f^α noise
• Time-invariant entanglement and sudden death of non-locality
• Mixed state Pauli channel parameter estimation
• Local quantum uncertainty of a two-qubit XY Heisenberg model with different Dzyaloshinskii-Moriya couplings
• Qutrit geometric discord
• Complementary relation of quantum coherence and quantum correlations in multiple measurements
• Phase boundaries in alternating field quantum XY model with Dzyaloshinskii-Moriya interaction: Sustainable entanglement in dynamics
• Noncompletely Positive Quantum Maps Enable Efficient Local Energy Extraction in Batteries
• The Degree of Quantum Correlation Required to Speed-Up a Computation
• Conditions for monogamy of quantum correlations in multipartite systems
• Building versatile bipartite probes for quantum metrology
• Negativity and quantum discord in Davies environments
• Internal entanglement and external correlations of any form limit each other
• Dynamical Gaussian quantum steering in optomechanics
• Effect of local filtering on Freezing Phenomena of Quantum Correlation
• Nonequilibrium Effects on Quantum Correlations: Discord, Mutual Information and Entanglement of a Two-Fermionic System in Bosonic and Fermionic Environments
• Direct method for measuring and witnessing quantum entanglement of arbitrary two-qubit states through Hong-Ou-Mandel interference
• Dissipative Entanglement of Quantum Spin Fluctuations
• Quantum Correlation with Sandwiched Relative Entropies: Advantageous as Order Parameter in Quantum Phase Transitions
• The One-Way Information Deficit and Geometry for a Class of Two-qubit States
• Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
• Uniform Decoherence Effect on Localizable Entanglement in Random Multi-qubit Pure States
• Measuring nonclassical correlations of two-photon states
• Role of correlations in the two-body-marginal problem
• Power of One Bit of Quantum Information in Quantum Metrology
• Quantum Otto engine with quantum correlations
• There is more to quantum interferometry than entanglement
• Local Entropies across the Mott Transition in an Exactly Solvable Model
• Experimental quantification of spatial correlations in quantum dynamics
• Monogamy deficit for quantum correlation in multipartite quantum system
• Progress towards a unified approach to entanglement distribution
• NMR dynamics of quantum discord for spin-carrying gas molecules in a closed nanopore
• Quantum features and signatures of quantum-thermal machines
• Power of one non-clean qubit
• Necessary and sufficient conditions for local creation of quantum discord
• Quantum correlations of identical particles subject to classical environmental noise
• On the pseudospectrum of the harmonic oscillator with imaginary cubic potential
• Enhancement of quantum correlations between two particles under decoherence in finite temperature environment
• Spin-echo entanglement protection from random telegraph noise
• Entanglement entropy after selective measurements in quantum chains
• Noisy receivers for quantum illumination
• Remote Creation of Quantum Coherence
• Multipartite quantum correlations in even and odd spin coherent states
• Predominance of entanglement of formation over quantum discord under quantum channels
• Monogamy of quantum discord
• Uncertainty Relation Based on Skew Information with Quantum Memory
• Engineering two-qubit mixed states with weak measurements
• Ancilla Induced Amplification of Quantum Fisher Information
• Limits for entanglement distribution with separable states
• Cryptographic aspects of quantum reading
• Quantum Fluctuations in Mesoscopic Systems
• Hierarchy of Genuine Multipartite Quantum Correlations
• Thermal quantum correlations and Teleportation in a Graphene Sheet
• Universal behavior of the Shannon mutual information in non-integrable self-dual quantum chains
• Collapse of the quantum correlation hierarchy links entropic uncertainty to entanglement creation
• Time-Invariant Discord in Dynamically Decoupled Systems
• A unified approach to Local Quantum Uncertainty and Interferometric Power by Metric Adjusted Skew Information
• Broadcasting of Quantum Correlations: Possibilities & Impossibilities
• Experimentally freezing quantum discord in a dissipative environment using dynamical decoupling
• Resource Theory of Total Quantum Coherence
• Sudden Change of Quantum Discord under Single Qubit Noise
• Conclusive Identification of Quantum Channels via Monogamy of Quantum Correlations
• Ion-crystal demonstration of structural phase transition induced solely by temperature
• Coherence and quantum correlations measure sensitivity to dephasing channels
• Density Matrix Recursion Method: Genuine Multisite Entanglement Distinguishes Odd from Even Quantum Heisenberg Ladders
• How to observe and quantify quantum-discorded states
• Hierarchy of efficiently computable and faithful lower bounds to quantum discord
• Causal classification of spatiotemporal quantum correlations
• Heat flow and noncommutative quantum mechanics in phase-space
• Tomographic discord for a system of two coupled nanoelectric circuits
• Dynamics of Atom-Atom Correlations in the Fermi problem
• Quantum Advantage for Shared Randomness Generation
• Scale-invariant freezing of entanglement
• Many-body localization transition through pairwise correlations
• Conditions for separability in multiqubit systems with an accelerating qubit using a conditional entropy
• Entangling power of two-qubit gates on mixed states
• How to observe and quantify quantum-discorded states via correlations
• Equilibration and nonclassicality of a double-well potential
• Local Quantum Uncertainty and Bounds on Quantumness for Orthogonally invariant class of states
• On the connection between microscopic description and memory effects in open quantum system dynamics
• Quantum discord protection from amplitude damping decoherence
• Maxwell's demons in multipartite quantum correlated systems
• Reducing Computational Complexity of Quantum Correlations
• Thermal Fluctuations Enhance Order-from-Disorder of Quantum Correlations in Quenched Disordered Spin Models
• Quantum synchronisation and clustering in chiral networks
• Enhancing the geometric quantum discord in the Heisenberg {\it XX} chain by Dzyaloshinsky-Moriya interaction
• Efficient Test to Demonstrate Genuine Three Particle Nonlocality
• A cold-atoms based processor for deterministic quantum computation with one qubit in intractably large Hilbert spaces
• Effective cutting of a quantum spin chain by bond impurities
• Influence of equilibrium and nonequilibrium environments on macroscopic realism through the Leggett-Garg inequalities
• Quantum discord of certain two-qubit states
• Deterministic generation of maximally discordant mixed states by dissipation
• Tuning interaction strength leads to ergodic-nonergodic transition of quantum correlations in anisotropic Heisenberg spin model
• Generating and protecting correlated quantum states under collective dephasing
• Nonclassicality of local bipartite correlations
• One-body information loss in fermion systems
• Weak Measurement and Two-State-Vector Formalism: Deficit of Momentum Transfer in Scattering Processes
• Unified entropic measures of quantum correlations induced by local measurements
• Influence of the external pressure on the quantum correlations of molecular magnets
• Quantum information causality
• Quantifying quantumness of correlations using Gaussian Rényi-2 entropy in optomechanical interfaces
• Entanglement in Algebraic Quantum Mechanics: Majorana fermion systems
• Quantum uncertainty in critical systems with three spins interaction
• Nonclassicality and criticality in symmetry-protected magnetic phases
• Classical extension of quantum-correlated separable states
• Quantum discord under system-environment coupling: the two-qubit case
• General quantum correlation from nonreal values of Kirkwood-Dirac quasiprobability over orthonormal product bases
• Noiseless linear amplification in quantum target detection using Gaussian states
• Generalized conditional entropy optimization for qudit-qubit states
• Concentrating tripartite quantum information
• Dynamical nonlocality in quantum time via modular operators
• Quantum correlations in a noisy neutron interferometer
• Qubit-Qutrit ($2\otimes 3$) quantum systems: An investigation of some quantum correlations under collective dephasing
• Superfluid-Insulator Transition unambiguously detected by entanglement in one-dimensional disordered superfluids
• One-way deficit and quantum phase transitions in $XY$ model and extended Ising model
• The relation between the quantum discord and quantum teleportation: the physical interpretation of the transition point between different quantum discord decay regimes
• Detecting phase boundaries of quantum spin-1/2 XXZ ladder via bipartite and multipartite entanglement transitions
• Sudden transitions of trace distance discord of dipole-dipole coupled two qubits
• Anomalous decay of quantum correlations of quantum dot qubits
• Operational characterization of quantumness of unsteerable bipartite states
• Forbidden regimes in the distribution of bipartite quantum correlations due to multiparty entanglement
• Thermal local quantum uncertainty in a two-qubit-superconducting system under decoherence
• Generalized conditional entropy in bipartite quantum systems
• Unified framework for quantumness -- coherence, discord, and entanglement
• Quantum discord dynamics of two qubits in the single-mode cavities
• All entangled states are quantum coherent with locally distinguishable bases
• Correlated quantum machines beyond the standard second law
• Measuring quantumness via anticommutators
• Computable measure of the quantum correlation
• Resource theoretic efficacy of the single copy of a two-qubit entangled state in a sequential network
• Conditions for the freezing phenomena of geometric measure of quantum discord for arbitrary two-qubit X states under non-dissipative dephasing noises
• Classical memoryless noise-induced maximally discordant mixed separable steady states
• Thermal quantum metrology in memoryless and correlated environments
• Towards Quantum Cybernetics
• Qubit-environment entanglement generation and the spin echo
• Benchmarks of Nonclassicality for Qubit Arrays
• Essential role of quantum speed limit in violation of Leggett-Garg inequality across a PT-transition
• Quantum and classical correlations in high temperature dynamics of two coupled large spins
• No-activation theorem for Gaussian nonclassical correlations by Gaussian operations
• Non-Markovianity through Multipartite Correlation Measures
• Effects of intrinsic decoherence on discord-like correlation measures of two-qubit spin squeezing model
• Witnesses of non-classicality for simulated hybrid quantum systems
• Unification of quantum resources in distributed scenarios
• Quantum Coherence Versus Non-Classical Correlations in Optomechanics
• Optimal approximations of available states and a triple uncertainty relation
• Quantum discord of SU(2) invariant states
• Mutual Information is not a Reliable Measure for Variations in Total Correlations
• Quantum Structures: A View of the Quantum World
• Survival of time-evolved correlations depends on whether quenching is across critical point in XY spin chain
• Entanglement-Coherence and Discord-Coherence analytical relations for X states
• Classifying two-body Hamiltonians for Quantum Darwinism
• Universal quantum correlation close to quantum critical phenomena
• The Power of One Clean Qubit in Supervised Machine Learning
• Interference Visibility as a Witness of Entanglement and Quantum Correlation
• One-Way Deficit of Two Qubit X States
• Quantum discord and information deficit in spin chains
• Exact and Efficient Simulation of Concordant Computation
• Scalable quantum computing model in the circuit-QED lattice with circulator function
• Quantum state space-dimension as a quantum resource
• Lower bounds on violation of monogamy inequality for quantum correlation measures
• Universality in Distribution of Monogamy Scores for Random Multiqubit Pure States
• Entanglement entropy and massless phase in the antiferromagnetic three-state quantum chiral clock model
• Characterizing nonclassical correlation using affinity
• A comparative study of LQU and LQFI in general qubit-qutrit axially symmetric states
• Entanglement in disordered superfluids: the impact of density, interaction and harmonic confinement on the Superconductor-Insulator transition
• Multipartite entanglement dynamics in a cavity
• Diagonal quantum discord
• The decay of quantum correlations between quantum dot spin qubits and the characteristics of its magnetic field dependence
• A Revisit to Non-maximally Entangled Mixed States: Teleportation Witness, Noisy Channel and Discord
• Generation and decoherence of soliton spatial superposition states
• The entropy production of thermal operations
• Direct observation of phase sensitive Hong-Ou-Mandel interference
• On the classicality of quantum dephasing processes
• Classical correlation and quantum entanglement in the mixed-spin Ising-XY model with Dzyaloshinskii-Moriya interaction
• Elucidating Dicke Superradiance by quantum uncertainty
• Cumulative quantum work-deficit versus entanglement in the dynamics of an infinite spin chain
• Shared Purity of Multipartite Quantum States
• Insight into ground-state spin arrangement and bipartite entanglement of the polymeric coordination compound [Dy${}_2$Cu${}_2$]${}_n$ through the symmetric spin-1/2 Ising-Heisenberg orthogonal-dimer chain
• Long-range multipartite quantum correlations and factorization in a one-dimensional spin-1/2 $XY$ chain
• Geometric quantification of multiparty entanglement through orthogonality of vectors
• Evolution of quantum correlations in a two-atom system
• Measuring quantumness: from theory to observability in interferometric setups
• Robustness of the Page-Wootters construction across different pictures, states of the universe and system-clock interactions
• Nonzero Classical Discord
• Experimental verification of the steering ellipsoid zoo via two-qubit states
• Coherence distribution in multipartite systems
• Measurement-induced nonlocality over two-sided projective measurements
• Heat current and entropy production rate in local non-Markovian quantum dynamics of global Markovian evolution
• Preserving quantum correlations and coherence with non-Markovianity
• Witnessing nonclassical correlations via a single-shot experiment on an ensemble of spins using NMR
• Quantum coherence and correlations in quantum system
• Uncertainty Relation for Mutual Information
• von Neumann measurement-related matrices and the nullity condition for quantum correlation
• Gaussian Rényi-2 correlations in a nondegenerate three-level laser
• Diagnosing Quantum Phases Using Long-Range Two-Site Quantum Resource Behaviors
• Exclusion principle for nonlocal advantage of quantum coherence
• Quantum microwave parametric interferometer
• Simulating of X-states and the two-qubit XYZ Heisenberg system on IBM quantum computer
• Identifying quantum phase transitions via geometric measures of nonclassicality
• Refined diamond norm bounds on the emergence of objectivity of observables
• Temperature-field phase diagrams of one-way quantum work deficit in two-qubit XXZ spin systems
• Monogamy relations of all quantum correlation measures for multipartite quantum systems
• Weak measurement effect on optimal estimation with lower and upper bound on relativistic metrology
• Necessity for quantum coherence of nondegeneracy in energy flow
• Noisy frequency estimation with noisy probes
• Conditional quantum entropy power inequality for $d$-level quantum systems
• Operational nonclassicality of local multipartite correlations in the limited-dimensional simulation scenario
• Generation of a non-zero discord bipartite state with classical second-order interference
• Entanglement and coherence in a spin-s XXZ system under non-uniform fields
• Why should we care about quantum discord?
• What can we learn from the dynamics of entanglement and quantum discord in the Tavis-Cummings model?
• Information complementarity in multipartite quantum states and security in cryptography
• Entanglement thresholds for displaying the quantum nature of teleportation
• Local quantum uncertainty of SU(2) invariant states
• Role of weak measurements on states ordering and monogamy of quantum correlation
• A no-go result on the purification of quantum states
• Dynamical paths and universality in continuous variables open systems
• Accessible bounds for general quantum resources
• Non-separability of Physical Systems as a Foundation of Consciousness
• Hierarchy of correlation quantifiers comparable to negativity
• Global quantum correlations in tripartite nonorthogonal states and monogamy properties
• Quantum cloning of steering
• Generalized approach to quantify correlations in bipartite quantum systems
• Non-classicality of spin structures in condensed matter: An analysis of Sr${}_{14}$Cu${}_{24}$O${}_{41}$
• Second law of thermodynamics with quantum memory
• Genuine tripartite entanglement and nonlocality in Bose-Einstein condensates by collective atomic recoil
• Negativity of quantumness and non-Markovianity in a qubit coupled to a thermal Ising spin bath system
• Classical and Quantum Orbital Correlations in the Molecular Electronic States
• Entropic uncertainty relations and quantum Fisher information of top quarks in a large hadron collider
• Quantum discord of states arising from graphs
• Tomographic characterisation of correlations in a photonic tripartite state
• Quantifying Superpositions Between Quantum Evolutions
• Quantum correlations in dissipative gain-loss systems across exceptional points
• Supersensitive measurement using single-atom control of an atomic ensemble
• Distribution of Bell inequality violation vs. multiparty quantum correlation measures
• Censorship of Quantum Resources in Quantum Networks
• How does interference fall?
• Hierarchy of quantum operations in manipulating coherence and entanglement
• Local-hidden-state models for Bell diagonal states and beyond
• Quantum mutual information and quantumness vectors for multi-qubit systems
• Dynamics and Quantum correlations in Two independently driven Rydberg atoms with distinct laser fields
• Measurement - induced qudit geometric discord
• A local-time-induced unique pointer basis
• Upper Bounds on the Distillable Randomness of Bipartite Quantum States
• Quantum correlations from classically correlated states
• Single-spin entanglement
• Quantum Correlations in Cavity QED Networks
• Hierarchy of continuous-variable quantum resource theories
• Sending classical information through relativistic quantum channels
• Enhancing nonclassical bosonic correlations in a Quantum Walk network through experimental control of disorder
• Two-qubit trace-norm geometric discord: the complete solution
• Approximate broadcasting of quantum correlations
• Multipartite monogamous relations for Entanglement and Discord
• Mimicking quantum correlation of a long-range Hamiltonian by finite-range interactions
• Activation of Nonmonogamous Multipartite Quantum States
• Tensor-network approach to compute genuine multisite entanglement in infinite quantum spin chains
• Monogamy relations for nonclassical correlations of multi-qubit states
• Study of nonclassicality in tripartite correlations beyond standard Bell nonlocality paradigm
• Channel discrimination power of bipartite quantum states
• Quantum discord as a tool for comparing collapse models and decoherence
• Discrete phase-space mappings, tomographic condition and permutation invariance
• Entanglement and algebraic independence in fermion systems
• Thermal effects on bipartite and multipartite correlations in fiber coupled cavity arrays
• Quantum steering and quantum discord under noisy channels and entanglement swapping
• Role of complementarity in superdense coding
• Toward a quantum computing algorithm to quantify classical and quantum correlation of system states
• New inequalities for quantum von Neumann and tomographic mutual information
• Entanglement distribution and quantum discord
• Geometric Discord Of the Jaynes-Cummings Model: Pure Dephasing Regime
• Quantum entanglement in finite-dimensional Hilbert spaces
• Quantumness of channels
• Non-monotonicity of trace distance under tensor products
• Simulating the effect of weak measurements by a phase damping channel and determining different measures of bipartite correlations in nuclear magnetic resonance
• Thermal quantum discord in the Heisenberg chain with impurity
• Correlation evolution and monogamy of two geometric quantum discords in multipartite systems
• Nearly Markovian maps and entanglement-based bound on corresponding non-Markovianity
• Liouville Space Neural Network Representation of Density Matrices
• The optimal approximation of qubit states with limited quantum states
• Interpreting Quantum Discord in Quantum Metrology
• Characterizing entanglement using quantum discord over state extensions
• Pairwise quantum discord for a symmetric multi-qubit system in different types of noisy channels
• Additivity relations in quantum correlations
• Simple permutation-based measure of quantum correlations and maximally-3-tangled states
• The sudden change phenomenon of quantum discord
• Statistics of projective measurement on a quantum probe as a witness of noncommutativity of algebra of a probed system
• Direct-dynamical entanglement-discord relations
• Macroscopic Schrödinger Cat Resistant to Particle Loss and Local Decoherence
• Completely Positive Maps for Reduced States of Indistinguishable Particles
• Quantum channels that destroy negative conditional entropy
• Emergence of maximal hidden quantum correlations and its trade-off with the filtering probability in dissipative two-qubit systems
• Information gain versus interference in Bohr's principle of complementarity
• A measure of quantum correlations that lies approximately between entanglement and discord
• Experimental Verification of Anisotropic Invariance for Three-Qubit States
• Characterizing quantum correlations in the nonsignaling framework
• Distinguishing Phases via Non-Markovian Dynamics of Entanglement in Topological Quantum Codes under Parallel Magnetic Field
• Mutual Uncertainty, Conditional Uncertainty and Strong Sub-Additivity
• Cumulative measure of correlation for multipartite quantum states
• Two-qubit correlations revisited: average mutual information, relevant (and useful) observables and an application to remote state preparation
• Distribution of Mutual Information in Multipartite States
• Quantum correlations of two qubits interacting with a macroscopic medium
• Symmetry in the open-system dynamics of quantum correlations
• Work statistics and Entanglement across the fermionic superfluid-insulator transition
• Correlations in local measurements and entanglement in many-body systems
• Phase diagram for the one-way quantum deficit of two-qubit X states
• Role of complementary correlations in the evolution of classical and quantum correlations under Markovian decoherence
• Quantum correlation dynamics in photosynthetic processes assisted by molecular vibrations
• Non-classicalities via perturbing local unitary operations
• Landau quantization, Rashba spin-orbit coupling and Zeeman splitting of two-dimensional heavy holes
• Mapping generalized Jaynes-Cummings interaction into correlated finite-sized systems
• Nonexistence of entangled continuous-variable Werner states with positive partial transpose
• Quantumness and the role of locality on quantum correlations
• Operational symmetries of entangled states
• Problem of quantifying quantum correlations with non-commutative discord
• A recursive approach for geometric quantifiers of quantum correlations in multiqubit Schrödinger cat states
• Hilbert-Schmidt measure of pairwise quantum discord for three-qubit $X$ states
• Experimental characterization of a non-local convertor for quantum photonic networks
• Intrinsic coherence in assisted sub-state discrimination
• Note on Product-Form Monogamy Relations for Nonlocality and Other Correlation Measures
• Locality of three-qubit Greenberger-Horne-Zeilinger-symmetric states
• Algebraic Probability-Theoretic Characterization of Quantum Correlations
• Observation of the tradeoff between internal quantum nonseparability and external classical correlations
• Unfolding system-environment correlation in open quantum systems: Revisiting master equations and the Born approximation
• Characterization of the quantumness of unsteerable tripartite correlations
• Precession-induced nonclassicality of the free induction decay of NV centers by a dynamical polarized nuclear spin bath
• Quantum correlations beyond entanglement in a classical-channel model of gravity
• Quantifying coherence of quantum channels based on the generalized $\alpha$-$z$-relative Rényi entropy
• Quantum Speed Limit for Change of Basis
• Adiabatic freezing of long-range quantum correlations in spin chains
• Role of quantum state texture in probing resource theories and quantum phase transition
• Observation of quantum temporal correlations well beyond Luders bound
• Nonmaximally entangled states can be better for quantum correlation distribution and storage
• Asymmetric One-Sided Semi-Device-Independent Steerability of Quantum Discordant States
• Coherent control of quantum systems as a resource theory
• Leggett-Garg inequality in Markovian quantum dynamics: role of temporal sequencing of coupling to bath
• Quantum correlations and coherence between two particles interacting with a thermal bath
• Quantum discord in photon added Glauber coherent states of $\mathrm{GHZ}$-type
• What bipartite states are lazy
• Nonclassical correlations in subsystems of globally entangled quantum states
• Time-invariant Discord: High Temperature Limit and Initial Environmental Correlations
• Computing coherence vectors and correlation matrices, with application to quantum discord quantification
• Quantum correlations for anonymous metrology
• Existence of maximally correlated states
• Minimum Disturbance Rewards with Maximum Possible Classical Correlations
• Quantum Discord Witness With Uncharacterized Devices
• Classical Optical Analogue of Quantum Discord
• Quantum state transfer using 1D Heisenberg Hamiltonian on quasi-1D lattices
• Classical and quantum parts of conditional mutual information for open quantum systems
• Quantum correlation cost of the weak measurement
• Area law and universality in the statistics of subsystem energy
• The local detection method: Dynamical detection of quantum discord with local operations
• Extensive Long-Range Entanglement at Finite Temperatures from a Nonequilibrium Bias
• Necessary and sufficient product criteria for quantum states via the rank of realignment matrix of density matrix
• Quantum Features of the Thermal Two-Qubit Quantum Rabi Model in Ultra- and Deep-Strong Regimes
• Local Decoherence-free Macroscopic Quantum states
• Coupled three-mode squeezed vacuum: Gaussian steering and remote generation of Wigner negativity
• Quantum correlations in general qubit-qudit axially symmetric states
• Quantum Kolmogorov complexity and quantum correlations in deterministic-control quantum Turing machines
• Remote transfer of Gaussian quantum discord
• Classification of no-signaling correlations and the guess your neighbor's input game
• One-way deficit of SU(2) invariant states
• Unveiling the nonclassicality within quasi-distribution representations through deep learning
• Family of Quantum Mutual Information in Multiparty Quantum Systems
• Measuring multipartite quantum correlations by thermodynamic work extraction
• Not-Post-Peierls compatibility under noisy channels
• Distribution of spin correlation strengths in multipartite systems
• Analytically Computable Symmetric Quantum Correlations
• The Geometric Structure of Quantum Resources for Bell-diagonal states
• Quantum coherence with incomplete set of pointers and corresponding wave-particle duality
• Restrictions on shareability of classical correlations for random multipartite quantum states
• On separable decompositions of quantum states with strong positive partial transposes
• Frozen and Invariant Quantum Discord under Local Dephasing Noise
• Relationship between the field local quadrature and the quantum discord of a photon-added correlated channel under the influence of scattering and phase fluctuation noise
• Certifying quantumness beyond steering and nonlocality and its implications on quantum information processing
• Super-quantum discord in ferromagnetic and antiferromagnetic materials
• PULSEE: A software for the quantum simulation of an extensive set of magnetic resonance observables
• Hallmarking quantum states: unified framework for coherence and correlations
• Applications of differential geometry and representation theory to description of quantum correlations
• Quantum Correlations in NMR systems
• Invariant entanglement and generation of quantum correlations under global dephasing
• Quantifying Nonclassicality of Correlations based on the Concept of Nondisruptive Local State Identification
• Behavior of quantum correlations under nondissipative decoherence by means of the correlation matrix
• Detecting Two Qubit Both-Way Positive Discord States
• Quantifying interference in multipartite quantum systems
• Partitions of Correlated N-Qubit Systems
• Statistics of leading digits leads to unification of quantum correlations
• Local available quantum correlations of X states: The symmetric and anti-symmetric cases
• Local available quantum correlations of non-symmetric X states
• Fate of multiparticle entanglement when one particle becomes classical
• Quantum speed of evolution of neutral mesons
• Anomalous Heat Transfer in Nonequilibrium Quantum Systems
• Estimating entanglement in 2D Heisenberg model in the strong rung-coupling limit
• Adaptively partitioned analog quantum simulation on near-term quantum computers: The nonclassical free-induction decay of NV centers in diamond
• Quantitative non-classicality of mediated interactions
• Maximal intrinsic randomness of a quantum state
• Entanglement of weighted graphs uncovers transitions in variable-range interacting models
• Dephasing effects on quantum correlations and teleportation in presence of state dependent bath
• High fidelity macroscopic superposition states via shortcut to adiabaticity
• Entanglement distribution through separable states via a zero-added-loss photon multiplexing inspired protocol
• Gate-Based Initialization and Fidelity in Correlated Open Quantum Systems
• Violation of Bell inequalities from Cosmic Microwave Background data
• Dynamics of Open Quantum Systems with Initial System-Environment Correlations via Stochastic Unravelings
• Entropy Bounds and Holographic Dark Energy: Conflicts and Consensus
• Hidden quantum-classical correspondence in chaotic billiards revealed by mutual information
• Anomalous flow in correlated quantum systems: No-go result and multiple-charge scenario
• One-way Unlocalizable Information Deficit
• Network mechanism for generating genuinely correlative Gaussian states
• Landau-type sudden transitions of quantum correlations
• The best approximation of a given qubit state with the limited pure-state set
• Quantum Correlations in Space-Time: Foundations and Applications
• On the possibility to detect quantum correlation regions with the variable optimal measurement angle
• Discord, quantum knowledge and private communications
• Revealing Tripartite Quantum Discord with Tripartite Information Diagram
• Irreversibility and correlations in coupled quantum oscillators
• Superdense Coding with Uniformly Accelerated Particle
• Relating quantum coherence and correlations with entropy-based measures
• Pairwise quantum and classical correlations in multi-qubits states via linear relative entropy
• Unified scheme for correlations using linear relative entropy
• Optimal nonlinear filtering of quantum state
• Detecting Non-Markovianity via Quantified Coherence: Theory and Experiments
• Quantum-to-Classical Transition via Single-Shot Generalized Measurements
• Geometric Discord of any arbitrary dimensional bipartite system and its application in quantum key distribution
• Complete condition for nonzero quantum correlation in continuous variable systems
• Censorship of quantum resources against catalytic account sharing
• Hierarchy of quantum correlations in qubit-qutrit axially symmetric states
• Violation of Diagonal Non-Invasiveness: A Hallmark of Non-Classical Memory Effects
• Coherence monotones of quantum channels based on two generalized quantum relative entropies
• A signature of quantumness in pure decoherence control
• Critical assessment of information back-flow in measurement-free teleportation
• On the use of total state decompositions for the study of reduced dynamics
• Quantum and classical correlations and Werner states in finite spin linear arrays
• Equivalence regimes for geometric quantum discord and local quantum uncertainty
• Weak Measurement effects on dynamics of quantum correlations in a Two-atom System in Thermal Reservoirs
• Mutual information-energy inequality for thermal states of a bipartite quantum system
• Emergence of outcomes in quantum mechanics
• Bayesian optimization of non-classical optomechanical correlations
• Dynamics of local quantum uncertainty among cavity-reservoir qubits
• Critical exponents of block-block mutual information in one-dimensional infinite lattice systems
• One-way quantum deficit for $2\otimes d$ systems
• Resolution to the quantum-classical dilemma in thermal ghost imaging
• Characterising two-sided quantum correlations beyond entanglement via metric-adjusted f-correlations
• One-way deficit and quantum phase transitions in $XX$ Model
• Revealing correlations between a system and an inaccessible environment
• Conditional purity and quantum correlation measures in two qubit mixed states
• Local-hidden-state models for T-states using finite shared randomness
• Quantum Correlations of Helicity Entangled States in Non-inertial Frames Beyond Single Mode Approximation
• Non-classical correlations between a quantum probe and complex quantum systems in presence of noise
• Conditional states and entropy in qudit-qubit systems
• Fractional Conformal Map, Qubit Dynamics and the Leggett-Garg Inequality
• Generating quantum dissonance via local operations
• Protecting three-dimensional entanglement from correlated amplitude damping channel
• Quantitative bounds to propagation of quantum correlations in many-body systems
• Logarithmic growth of peripheral entanglement concentrated via noisy measurements in a star network of spins
• Distributing quantum correlations through local operations and classical resources
• Multipartite distribution property of one way discord beyond measurement
• Correlating Local Quantum Reality with Causally Disconnected Choices
• When quantum memory is useful for dense coding
• Quantum discord in the central spin model
• Adapted projection operator technique for the treatment of initial correlations
• Enhancing entanglement and total correlations dynamics via local unitaries
• Measuring quantum discord using the most distinguishable steered states
• Different Types of Coherence: Young-type Interference versus Dicke Superradiance
• Local quantum Fisher information and one-way quantum deficit in spin-$\frac{1}{2}$ $XX$ Heisenberg chain with three-spin interaction
• Shareability of Quantum Correlations in a Many-Body Spin System with Two- and Three-Body Interactions
• Permutation Enhances Classical Communication Assisted by Entangled States
• Correlation and Entanglement dynamics for two atoms distributed in two isolated thermal cavities
• Quantum discord for multipartite coherent states interpolating between Werner and Greenberger-Horne-Zeilinger states
• Preparation of quantum correlations assisted by a steering Maxwell demon
• Rare semileptonic decay of ${\chi }_{c1}(1p)$ meson In QCD
• Dynamics of Quantum Coherence and Non-Classical Correlations in Open Quantum System Coupled to a Squeezed Thermal Bath
• Generation and Detection of Quantum Correlations and Entanglement on a Spin-Based Quantum Information Processor
• Geometric measures of discordlike quantum correlations based on Tsallis relative entropy
• Computable Measure of Total Quantum Correlation of Multipartite Systems
• Bimodal behavior of post-measured entropy and one-way quantum deficit for two-qubit X states
• Local Hidden Variable Theoretic Measure of Quantumness of Mutual Information
• Total quantum coherence and its applications
• Some aspects of the interplay between bipartite correlations and quantum channels
• The roles of quantum correlations in quantum cloning
• Any Two Qubit State Has Non Zero Quantum Discord Under Global Unitary Operations
• Universal decay of quantumness for photonic qubits carrying orbital angular momentum through atmospheric turbulence
• Axiomatic quantum mechanics: Necessity and benefits for the physics studies
• Extremal properties of conditional entropy and quantum discord for XXZ symmetric quantum states
• Is monogamy of entanglement geometrical?
• Does Quantum Information Require Additional Structure?
• Oracle problems as communication tasks and optimization of quantum algorithms
• Correlations in geometric states
• Emergence of Classical Objectivity of Quantum Darwinism in a Photonic Quantum Simulator
• Non-Markovian Reactivation of Quantum Relays
• Realizing fully reference-frame-independent quantum key distribution by exploiting quantum discord
• Thermodynamic Constraints on the Emergence of Intersubjectivity in Quantum Systems
• Entanglement as the cross-symmetric part of quantum discord
• Local-available quantum correlation swapping in one-parameter X states
• Quantum information transfer using weak measurements and any non-product resource state
• A computable multipartite multimode Gaussian correlation measure and the monogamy relation for continuous-variable systems
• Classical State Detection Using Quantum State Tomography
• On the upper bound of classical correlations in a bipartite quantum system
• Correlations in a quantum switch-based heat engine with measurements: A proof-of-principle demonstration
• Non-commutativity measure of quantum discord
• Logically reversible measurements: Construction and application
• Information-Theoretic Analysis of Weak Measurements and Their Reversal
• Hierarchies among genuine multipartite entangling capabilities of quantum gates
• The uncertainty of quantum states with respect to the projective measurement
• On Quantum Generalizations of Information-Theoretic Measures and their Contribution to Distributional Semantics
• Detecting Initial System-Environment Correlations from a Single Observable
• What are temporal correlations
• Global-Local Duality of Energetic Control Cost in Multipartite Quantum Correlated Systems
• Distribution of quantum discord in Heisenberg Antiferromagnets
• An axiomatic measure of one-way quantum information
• Quantum discord-breaking and discord-annihilating channels
• Diverging scaling with converging multisite entanglement in odd and even quantum Heisenberg ladders
• Conditional emergence of classical domain and branching of quantum histories
• Realizing quantum advantage without entanglement in single-photon states
• One-Way Deficit and Holevo Quantity of Generalized $n$-qubit Werner State
• Connecting Commutativity and Classicality for Multi-Time Quantum Processes
• Imperfect Entangling Power of Quantum Gates
• Exploring quantum correlations in a hybrid optomechanical system
• Discrimination of discord in separable Gaussian states
• Entropy Production and the Role of Correlations in Quantum Brownian Motion
• Information Theoretic Resources in Quantum Theory
• Macroscopicity and observational deficit in states, operations, and correlations
• Quantum Coherence Bounds the Distributed Discords
• Life thrives on abundance (quantum included)
• Toward Witnessing Molecular Exciton Entanglement from Spectroscopy