Observation of entanglement propagation in a quantum many-body system

Abstract

The key to explaining a wide range of quantum phenomena is understanding how entanglement propagates around many-body systems. Furthermore, the controlled distribution of entanglement is of fundamental importance for quantum communication and computation. In many situations, quasiparticles are the carriers of information around a quantum system and are expected to distribute entanglement in a fashion determined by the system interactions. Here we report on the observation of magnon quasiparticle dynamics in a one-dimensional many-body quantum system of trapped ions representing an Ising spin model. Using the ability to tune the effective interaction range, and to prepare and measure the quantum state at the individual particle level, we observe new quasiparticle phenomena. For the first time, we reveal the entanglement distributed by quasiparticles around a many-body system. Second, for long-range interactions we observe the divergence of quasiparticle velocity and breakdown of the light-cone picture that is valid for short-range interactions. Our results will allow experimental studies of a wide range of phenomena, such as quantum transport, thermalisation, localisation and entanglement growth, and represent a first step towards a new quantum-optical regime with on-demand quasiparticles with tunable non-linear interactions.

[v1]: 11 pages, 4 figures, 4 extended data figures; [v2]: Update Reference [26], for Complentary work see also arXiv:1401.5088; [v3]: Update acknowledgments

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• Probing spectral features of quantum many-body systems with quantum simulators
• Entanglement and quantum correlations in the XX spin-$1/2$ honeycomb lattice
• Scaling at the OTOC Wavefront: free versus chaotic models
• Intrinsic anharmonic effects on the phonon frequencies and effective spin-spin interactions in a quantum simulator made from trapped ions in a linear Paul trap
• Noise-induced transport in the motion of trapped ions
• Thermal Area Law in Long-Range Interacting Systems
• Diagnosing Quantum Phases Using Long-Range Two-Site Quantum Resource Behaviors
• Impact of dephasing on non-equilibrium steady-state transport in fermionic chains with long-range hopping
• Information Scrambling and the Correspondence of Entanglement- and Operator Dynamics in Systems with Nonlocal Interactions
• Photon-mediated correlated hopping in a synthetic ladder
• Continuum approach to real time dynamics of 1+1D gauge field theory: out of horizon correlations of the Schwinger model
• Fluctuations and Non-Hermiticity in the Stochastic Approach to Quantum Spins
• Effect of long-range interactions on multipartite entanglement in Heisenberg chains
• Strong entanglement of spins inside a quantum domain wall
• The bilinear-biquadratic model on the complete graph
• Critical behavior of su(1|1) supersymmetric spin chains with long-range interactions
• Spreading of correlations and Loschmidt echo after quantum quenches of a Bose gas in the Aubry-André potential
• Quench dynamics of dipolar fermions in a one-dimensional harmonic trap
• Entanglement and entropy production in coupled single-mode Bose-Einstein condensates
• Delocalization of quantum information in long-range interacting systems
• Slow scrambling and hidden integrability in a random rotor model
• Strong quenches in the one-dimensional Fermi-Hubbard model
• Dual trapped-ion quantum simulators: an alternative route towards exotic quantum magnets
• Phase-adaptive dynamical decoupling methods for robust spin-spin dynamics in trapped ions
• Comparison of Spontaneous Emission in Trapped Ion Multiqubit Gates at High Magnetic Fields
• Accessing the bath information in open quantum systems with the stochastic c-number Langevin equation method
• Constraints on correlations in multiqubit systems
• The dynamical $\alpha$-Rényi entropies of local Hamiltonians grow at most linearly in time
• Linear mapping between magnetic susceptibility and entanglement in conventional and exotic one-dimensional superfluids
• Aharonov-Bohm effect in a helical ring with long-range hopping: Effects of Rashba spin-orbit interaction and disorder
• Geometric representation of spin correlations and applications to ultracold systems
• Understanding the dynamics of randomly positioned dipolar spin ensembles
• Localisation determines the optimal noise rate for quantum transport
• Simplicity of mean-field theories in neural quantum states
• Quantum-enhanced sensing with variable-range interactions
• Universal defects statistics with strong long-range interactions
• BCS-like disorder-driven instabilities and ultraviolet effects in nodal-line semimetals
• Effective-Dimension Theory of Critical Phenomena above Upper Critical Dimensions
• Non-Anderson critical scaling of the Thouless conductance in 1D
• Propagation and jamming dynamics in Heisenberg spin ladders
• Exact generation of quantum states by the dynamics of spin chains
• Dynamical Quantum Phase Transitions in presence of a spin bath
• Duality between disordered nodal semimetals and systems with power-law hopping
• Out-of-equilibrium dynamics across the first-order quantum transitions of one-dimensional quantum Ising models
• Evaporative cooling to a Rydberg crystal close to its ground state
• One-dimensional L{é}vy Quasicrystal
• More current with less particles due to power-law hopping
• Completely subradiant multi-atom architectures through 2D photonic crystals
• Many-body chaos in the antiferromagnetic quantum critical metal
• Correlation Minor Norms, Entanglement Detection and Discord
• Adiabatic state preparation of stripe phases with strongly magnetic atoms
• Entanglement Dynamics between Ising Spins and a Central Ancilla
• Single-particle localization in a two-dimensional Rydberg spin system
• Boson Sampling for Generalized Bosons
• Quantum Transports in Two-Dimensions with Long Range Hopping: Shielding, Localization and the Extended Isolated State
• Time optimal quantum state transfer in a fully-connected quantum computer
• Degeneracy in excited-state quantum phase transitions of two-level bosonic models and its influence on system dynamics
• Partitioned Density Matrices and Entanglement Correlators
• Quantum Information Aspects on Bulk and Nano Interacting Fermi System: Spin-Space Density Matrix Approach
• The deformed Inozemtsev spin chain
• Critical phase induced by Berry phase and dissipation in a spin chain
• Exactly solvable dynamics and signatures of integrability in an infinite-range many-body Floquet spin system
• Scalable protocol to mitigate $ZZ$ crosstalk in universal quantum gates
• Speed limits to fluctuation dynamics
• Measuring nonequilibrium retarded spin-spin Green's functions in an ion-trap based quantum simulator
• Coherent excitation transport through ring-shaped networks
• Simple Hamiltonian dynamics is a powerful quantum processing resource
• Multiparticle Quantum Heat Engine: Exploring the Impact of Criticality on Efficiency
• Non-equilibrium physics of Rydberg lattices in the presence of noise and dissipative processes
• Switchable Particle Statistics with an Embedding Quantum Simulator
• Localization of Pairs in One-Dimensional Quasicrystals with Power-Law Hopping
• Spreading of correlations in a quenched repulsive and attractive one dimensional lattice system
• Cluster truncated Wigner approximation for bond-disordered Heisenberg spin models
• Symmetry: a fundamental resource for quantum coherence and metrology
• Maximizing information obtainable by quantum sensors through the Quantum Zeno Effect
• Quantum coherence assisted dynamical phase transition
• Tensor-network-based variational Monte Carlo approach to the non-equilibrium steady state of open quantum systems
• The Interspersed Spin Boson Lattice Model
• State dependent spread of entanglement in relatively local Hamiltonians
• Persistent Ballistic Entanglement Spreading with Optimal Control in Quantum Spin Chains
• Verifying a quasi-classical spin model of perturbed quantum rewinding in a Fermi gas
• Mesoscopic Spin Systems as Quantum Entanglers
• Anti-Drude Metal of Bosons
• Toward simulating quantum field theories with controlled phonon-ion dynamics: A hybrid analog-digital approach
• Breakdown of Linear Spin-Wave Theory in a Non-Hermitian Quantum Spin Chain
• Scale-invariant phase transition of disordered bosons in one dimension
• Quasiballistic transport in long-range anisotropic Heisenberg model
• Entanglement Propagation in Integrable Heisenberg Chains from a New Lens
• Excitation transfer in disordered spin chains with long-range exchange interactions
• Optimal spatial searches with long-range tunneling
• Light cone in the two-dimensional transverse-field Ising model in time-dependent mean-field theory
• Relaxation Processes in Long-Range Lattices
• From Light-Cone to Supersonic Propagation of Correlations by Competing Short- and Long-Range Couplings
• Quantum simulation of long range $XY$ quantum spin glass with strong area-law violation using trapped ions
• Signatures of Integrability and Exactly Solvable Dynamics in an Infinite-Range Many-Body Floquet Spin System
• Tomonaga-Luttinger Liquid Behavior in a Rydberg-encoded Spin Chain
• Ultrafast asymmetric Rosen-Zener-like coherent phonon responses observed in silicon
• Quench dynamics of two component dipolar fermions subject to a quasiperiodic potential
• Finite-time quantum quenches in the XXZ Heisenberg chain
• Long-range Ising interactions mediated by $\lambda {\varphi }^4$ fields: probing the renormalisation of sound in crystals of trapped ions
• Accessing eigenstate spin-glass order from reduced density matrices
• Asymmetric Transport in Long-Range Interacting Chiral Spin Chains
• Quantum Simulation of Non-perturbative Cavity QED with Trapped Ions
• Probing Majorana Modes via Local Spin Dynamics
• Quantized alternate current on curved graphene
• The local detection method: Dynamical detection of quantum discord with local operations
• Non-invasive measurement of currents in analog quantum simulators
• Theory of Critical Phenomena with Memory
• A novel class of translationally invariant spin chains with long-range interactions
• Dephasing with strings attached
• Estimate of equilibration times of quantum correlation functions in the thermodynamic limit based on Lanczos coefficients
• Capturing the Page Curve and Entanglement Dynamics of Black Holes in Quantum Computers
• Mitigation of correlated readout errors without randomized measurements
• Long-range interactions from $U\left(1\right)$ gauge fields via dimensional mismatch
• Quantum Phase Transitions in periodically quenched systems
• Absence of Correlations in Dissipative Interacting Qubits: a No-Go Theorem
• Lieb-Robinson Bounds on Entanglement Gaps from Symmetry-Protected Topology
• Faithful quantum state transfer between weakly coupled qubits
• Shannon entropy in quasiparticle states of quantum chains
• The singularities of the rate function of quantum coherent work in one-dimensional transverse field Ising model
• Ring-exchange physics in a chain of three-level ions
• Interactions-disorder duality and critical phenomena in nodal semimetals, dilute gases and other systems
• The role of higher-order terms in trapped-ion quantum computing with magnetic gradient induced coupling
• Polarity of the fermionic condensation in the $p$-wave Kitaev model on a square lattice
• Stochastic parameter optimization analysis of dynamical quantum critical phenomena in long-range transverse-field Ising chain
• Entanglement dynamics in dissipative photonic Mott insulators
• Transport of quantum excitations via local and nonlocal fluctuations
• Precision magnetometry exploiting excited state quantum phase transitions
• Feasibility of the ion-trap simulation of a class of non-equilibrium phase transitions
• Ab-Initio Approach to Many-Body Quantum Spin Dynamics
• Equilibration of quantum cat states
• Amplifying quantum correlations with quench dynamics in a quantum spin chain: Steady-states versus ground-states
• Engineering an Effective Three-spin Hamiltonian in Trapped-ion Systems for Applications in Quantum Simulation
• Generalized Cross-Entropy Benchmarking for Random Circuits with Ergodicity
• Pinned, locked, pushed, and pulled traveling waves in structured environments
• Criticality of the Higgs mass for the long-range quantum $XY$ chain: Amplitude ratio between the Higgs and paramagnetic gaps
• Lieb-Robinson bounds imply locality of interactions
• Ballistic propagation of a local impact in the one-dimensional $XY$ model
• Floquet Gauge Pumps as Sensors for Spectral Degeneracies Protected by Symmetry or Topology
• Spread of Correlations in Strongly Disordered Lattice Systems with Long-Range Coupling
• Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $\lambda {\varphi }^4$ model
• Robustness of the projected squeezed state protocol
• Dynamical Phase Transitions, Caustics, and Quantum Dark Bands
• Slow decay rate of correlations induced by long-range extended Dzyaloshinskii-Moriya interactions
• Field-induced magnon decays in dipolar quantum magnets
• Bound energy, entanglement and identifying critical points in 1D long-range Kitaev model
• Learning out-of-time-ordered correlators with classical kernel methods
• Exact Solvability Of Entanglement For Arbitrary Initial State in an Infinite-Range Floquet System
• Strong Disorder Renormalization Group Method for Bond Disordered Antiferromagnetic Quantum Spin Chains with Long Range Interactions: Ground State Properties
• Configurable photonic simulator for quantum field dynamics
• Tailoring interaction ranges in atom arrays
• Energy-level statistics in strongly disordered systems with power-law hopping
• Bounding entanglement spreading after a local quench
• Emergent Thermalization Thresholds in Unitary Dynamics of Inhomogeneously Disordered Quantum Systems
• Optimal randomized measurements for a family of non-linear quantum properties
• Interpretable representation learning of quantum data enabled by probabilistic variational autoencoders
• Microscopic Observation of the Light-Cone-Like Thermal Correlations in Cracking Excitations
• Suppression of the horizon effect in pairing correlation functions of $t$-$J$ chains after a quantum quench
• Entanglement-enhanced correlation propagation in the one-dimensional SU($N$) Fermi-Hubbard model
• Floquet thermalization by power-law induced permutation symmetry breaking
• Stability of current-carrying states in hard-core bosons with long-range hopping on a square lattice
• Bounded-Error Quantum Simulation via Hamiltonian and Lindbladian Learning
• Long-Range Pairing in the Kitaev Model: Krylov Subspace Signatures
• Coexistence of localized and extended states in the Anderson model with long-range hopping
• Tachyonic quench in a free bosonic field theory
• Engineering quasi-steady-state correlations in uncorrelated thermal states using stochastic driving
• Entanglement dynamics and ergodicity breaking in a quantum cellular automaton
• Information propagation in a non-local model with emergent locality
• Quantum wake dynamics in Heisenberg antiferromagnetic chains
• Protective measurement of a qubit by a qubit probe
• Quantum equilibration of a model system Porphine
• Interaction as stochastic noise
• Relativistic meson spectra on ion-trap quantum simulators
• Theoretical study on thermalization in isolated quantum systems
• Berezinskii-Kosterlitz-Thouless phase transitions with long-range couplings
• Quantum walkers in a disordered lattice with power-law hopping
• Criticality of the magnon-bound-state hierarchy for the quantum Ising chain with the long-range interactions
• The inverse-square interaction phase diagram: unitarity in the bosonic ground state
• Multipartite entanglement in quantum phase transitions
• From Quantum Optics to Quantum Technologies
• Emergence of caustics in dynamics of the Kitaev model
• Bose-Hubbard model with power-law hopping in one dimension
• Geometrical frustration, power law tunneling and non-local gauge fields from scattered light
• Many-body spectral transitions through the lens of the variable-range SYK2 model
• Creation of two-dimensional coulomb crystals of ions in oblate Paul traps for quantum simulations