Superconducting Qubits: Current State of Play

Abstract

Superconducting qubits are leading candidates in the race to build a quantum computer capable of realizing computations beyond the reach of modern supercomputers. The superconducting qubit modality has been used to demonstrate prototype algorithms in the 'noisy intermediate scale quantum' (NISQ) technology era, in which non-error-corrected qubits are used to implement quantum simulations and quantum algorithms. With the recent demonstrations of multiple high fidelity two-qubit gates as well as operations on logical qubits in extensible superconducting qubit systems, this modality also holds promise for the longer-term goal of building larger-scale error-corrected quantum computers. In this brief review, we discuss several of the recent experimental advances in qubit hardware, gate implementations, readout capabilities, early NISQ algorithm implementations, and quantum error correction using superconducting qubits. While continued work on many aspects of this technology is certainly necessary, the pace of both conceptual and technical progress in the last years has been impressive, and here we hope to convey the excitement stemming from this progress.

28 pages, 4 figures

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• Mitigating Losses of Superconducting Qubits Strongly Coupled to Defect Modes
• Readout error mitigated quantum state tomography tested on superconducting qubits
• Combating fluctuations in relaxation times of fixed-frequency transmon qubits with microwave-dressed states
• Ability of error correlations to improve the performance of variational quantum algorithms
• A cellular automaton decoder for a noise-bias tailored color code
• Analytic approach to transport in superconducting junctions with arbitrary carrier density
• Quantum interference device for controlled two-qubit operations
• Quantum computing with superconducting circuits in the picosecond regime
• Quasiparticle spectroscopy, transport, and magnetic properties of Nb films used in superconducting transmon qubits
• Error-correction and noise-decoherence thresholds for coherent errors in planar-graph surface codes
• Dynamic-ADAPT-QAOA: An algorithm with shallow and noise-resilient circuits
• Fundamental thresholds of realistic quantum error correction circuits from classical spin models
• Topological edge states at Floquet quantum criticality
• Optimal quantum parametric feedback cooling
• Spectroscopic measurements and models of energy deposition in the substrate of quantum circuits by natural ionizing radiation
• Deterministic one-way logic gates on a cloud quantum computer
• Continuous quantum gate sets and pulse class meta-optimization
• Witnessing quantum chaos using observational entropy
• Electron spin resonance with scanning tunneling microscopy: a tool for an on-surface quantum platform of identical qubits
• Quantum computing through the lens of control: A tutorial introduction
• Nonlinear characteristics of Ti, Nb, and NbN superconducting resonators for parametric amplifiers
• Magneto-thermal-switching properties of superconducting Nb
• Coherent dynamics of a photon-dressed qubit
• Deterministic generation of a 20-qubit two-dimensional photonic cluster state
• Microwave Sensing of Andreev Bound States in a Gate-Defined Superconducting Quantum Point Contact
• Quantum routing with fast reversals
• Josephson vortex-based memory
• Josephson diode effect with Andreev and Majorana bound states
• Thermal Noise in Electro-Optic Devices at Cryogenic Temperatures
• Photon-Number-Dependent Hamiltonian Engineering for Cavities
• Many-body entropies and entanglement from polynomially-many local measurements
• Superradiant Phase Transition in the Strong Coupling Regime
• Reconfigurable Network for Quantum Transport Simulation
• Demonstration of microwave single-shot quantum key distribution
• Quantum computing with subwavelength atomic arrays
• Machine Learning-Assisted Manipulation and Readout of Molecular Spin Qubits
• Building a Quantum Engineering Undergraduate Program
• A Review of Design Concerns in Superconducting Quantum Circuits
• Dissipative variational quantum algorithms for Gibbs state preparation
• Optimizing Gate Decomposition for High-Level Quantum Programming
• Mixed Integer Linear Programming Solver Using Benders Decomposition Assisted by Neutral Atom Quantum Processor
• Resource analysis of quantum algorithms for coarse-grained protein folding models
• Large magneto-thermal-switching ratio in superconducting Pb wires
• A Quantum Computing Implementation of Nuclear-Electronic Orbital (NEO) Theory: Towards an Exact pre-Born-Oppenheimer Formulation of Molecular Quantum Systems
• Quantum dynamics of disordered arrays of interacting superconducting qubits: signatures of quantum collective states
• CircuitQ: An open-source toolbox for superconducting circuits
• Quasiparticle tunneling and 1/f charge noise in ultrastrongly coupled superconducting qubit and resonator
• Simulating a ring-like Hubbard system with a quantum computer
• A quantum circuit simulator and its applications on Sunway TaihuLight supercomputer
• Thermodynamic Analysis of Algorithmic Cooling Protocols: Efficiency Metrics and Improved Designs
• Simulating open quantum systems with giant atoms
• Efficient High-Fidelity Flying Qubit Shaping
• Dark-State-Induced Heat Rectification
• A compact and tunable forward coupler based on high-impedance superconducting nanowires
• Direct implementation of a perceptron in superconducting circuit quantum hardware
• Distributed Quantum Computing: Applications and Challenges
• Single-atom maser with engineered circuit for population inversion
• Extreme High-Field Superconductivity in Thin Re Films
• Investigating microwave loss of SiGe using superconducting transmon qubits
• Observational entropic study of Anderson localization
• Stabilizer Rényi Entropy and Conformal Field Theory
• Baseband control of superconducting qubits with shared microwave drives
• Avoiding Barren Plateaus with Entanglement
• Nonadiabatic geometric quantum computation with shortened path on superconducting circuits
• Universal quantum state preparation via revised greedy algorithm
• Supercurrent through an Andreev trimer
• Control of spectroscopic features of multiphoton transitions in two coupled qubits by driving fields
• Abatement of Ionizing Radiation for Superconducting Quantum Devices
• Quasiparticle effects in magnetic-field-resilient 3D transmons
• SQ-CARS: A Scalable Quantum Control and Readout System
• A new approach to the quantization of the damped harmonic oscillator
• Detection of temporal fluctuation in superconducting qubits for quantum error mitigation
• Complexity of spin configurations dynamics due to unitary evolution and periodic projective measurements
• Agents for self-driving laboratories applied to quantum computing
• Enhancing Qubit Readout with Autoencoders
• Coherent states of the Laguerre-Gauss modes
• From edge to bulk: Cavity induced displacement of topological non-local qubits
• The influence of pinholes and weak-points in aluminium-oxide Josephson junctions
• Universal Robust Geometric Quantum Control via Geometric Trajectory Correction
• Sub-Kelvin Thermometer for On-Chip Measurements of Microwave Devices Utilizing Two-Level Systems in Superconducting Microresonators
• Nonadiabatic geometric quantum gates with on-demand trajectories
• Design of a release-free piezo-optomechanical quantum transducer
• Free Mode Removal and Mode Decoupling for Simulating General Superconducting Quantum Circuits
• Near-term Efficient Quantum Algorithms for Entanglement Analysis
• Quantum-machine-assisted Drug Discovery
• Josephson effect and critical currents in trivial and topological full-shell hybrid nanowires
• Nonadiabatic Holonomic Quantum Computation via Path Optimization
• Slow thermalization and subdiffusion in $U(1)$ conserving Floquet random circuits
• The fastest generation of multipartite entanglement with natural interactions
• Quantum Error Mitigation via Quantum-Noise-Effect Circuit Groups
• Observing Parity Time Symmetry Breaking in a Josephson Parametric Amplifier
• Cuprate Twistronics for Quantum Hardware
• Nuclear Spin Engineering for Quantum Information Science
• Low-temperature environments for quantum computation and quantum simulation
• Simulation of Quantum Computers: Review and Acceleration Opportunities
• HiSEP-Q: A Highly Scalable and Efficient Quantum Control Processor for Superconducting Qubits
• Demonstrating efficient and robust bosonic state reconstruction via optimized excitation counting
• Modeling Short-Range Microwave Networks to Scale Superconducting Quantum Computation
• Ultrafast non-destructive measurement of the quantum state of light using free electrons
• Exchange interaction between two quantum dots coupled through a superconducting island
• Impurity Knight shift in quantum dot Josephson junctions
• Robustness of controlled Hamiltonian approaches to unitary quantum gates
• Simulating noise on a quantum processor: interactions between a qubit and resonant two-level system bath
• Individual-Ion Addressing and Readout in a Penning Trap
• The carbon nanotube gatemon qubit
• Minimizing the discrimination time for quantum states of an artificial atom
• High-Order Qubit Dephasing at Sweet Spots by Non-Gaussian Fluctuators: Symmetry Breaking and Floquet Protection
• Heat bath in a quantum circuit
• Quantifying protocol efficiency: a thermodynamic figure of merit for classical and quantum state-transfer protocols
• Interaction-controlled impurity transport in trapped mixtures of ultracold bosons
• Dephasing in Fluxonium Qubits from Coherent Quantum Phase Slips
• Code switching revisited: Low-overhead magic state preparation using color codes
• Suppressed crosstalk between two-junction superconducting qubits with mode-selective exchange coupling
• The effects of disorder in superconducting materials on qubit coherence
• Characterization of a Transmon Qubit in a 3D Cavity for Quantum Machine Learning and Photon Counting
• Quantum Zeno Effect in Noisy Integrable Quantum Circuits for Impurity Models
• A superconducting circuit realization of combinatorial gauge symmetry
• Preparing students for the quantum information revolution: Interdisciplinary teaching, curriculum development, and advising in quantum information science and engineering
• Energy-band echoes: Time-reversed light emission from optically driven quasiparticle wavepackets
• Quantum many-body spin ratchets
• Quantum Volume for Photonic Quantum Processors
• Pair-amplitude dynamics in strongly-coupled superconductor-quantum dot hybrids
• Designing arbitrary single-axis rotations robust against perpendicular time-dependent noise
• Protected Solid-State Qubits
• Characterization and tomography of a hidden qubit
• Applicability of Measurement-based Quantum Computation towards Physically-driven Variational Quantum Eigensolver
• Complete description of fault-tolerant quantum gate operations for topological Majorana qubit systems
• Quantum-circuit refrigeration of a superconducting microwave resonator well below a single quantum
• Cross-Platform Verification in Quantum Networks
• Ultrasensitive Measurement of Angular Rotations via Hermite-Gaussian Pointer
• Quantifying the accuracy of steady states obtained from the Universal Lindblad Equation
• Maximal steady-state entanglement in autonomous quantum thermal machines
• Programmable Hamiltonian engineering with quadratic quantum Fourier transform
• Noise-robust exploration of many-body quantum states on near-term quantum devices
• Phonon-number resolution of voltage-biased mechanical oscillators with weakly-anharmonic superconducting circuits
• Globally driven superconducting quantum computing architecture
• Accelerating multipartite entanglement generation in non-Hermitian superconducting qubits
• Realizing a class of stabilizer quantum error correction codes using a single ancilla and circular connectivity
• Dynamics of a multipartite hybrid quantum system with beamsplitter, dipole-dipole, and Ising interactions
• Magnetic flux penetration in nanoscale wedge-shaped superconducting thin films
• Learning a quantum channel from its steady-state
• A quantum algorithm for solving 0-1 Knapsack problems
• Statistical detection of Josephson, Andreev, and single quasiparticle currents in scanning tunneling microscopy
• Preparation of high fidelity entangled cat states with composite pulses
• Magnon-mediated quantum gates for superconducting qubits
• Fidelity-dissipation relations in quantum gates
• Universal Counterdiabatic Driving
• Efficient Concatenated Bosonic Code for Additive Gaussian Noise
• Subgap states in semiconductor-superconductor devices for quantum technologies: Andreev qubits and minimal Majorana chains
• Charge-parity switching effects and optimisation of transmon-qubit design parameters
• Demonstration of long-range correlations via susceptibility measurements in a one-dimensional superconducting Josephson spin chain
• Designing fast quantum gates using optimal control with a reinforcement-learning ansatz
• Floquet engineering flat bands for bosonic fractional quantum Hall in small lattices
• Floquet Analysis of Frequency Collisions
• Shortcuts to adiabaticity in superconducting circuits for fast multi-partite state generation
• 50 Ohm Transmission Lines with Extreme Wavelength Compression Based on Superconducting Nanowires on High-Permittivity Substrates
• Quantum Advantage in Cryptography with a Low-Connectivity Quantum Annealer
• Cryogenic characterization and modeling of a CMOS floating-gate device for quantum control hardware
• Efficient fault-tolerant code switching via one-way transversal CNOT gates
• Nonvolatile magneto-thermal switching driven by vortex trapping in commercial In-Sn solder
• A photonic which-path entangler based on longitudinal cavity-qubit coupling
• Implementation of single-qubit gates via parametric modulation in the Majorana transmon
• Resonance fluorescence of two asymmetrically pumped and coupled two-level systems
• Tunable compact on-chip superconducting switch
• Tuning the supercurrent distribution in parallel ballistic graphene Josephson junctions
• Systematic study on the dependence of the warm-start quantum approximate optimization algorithm on approximate solutions
• Fast ZZ-Free Entangling Gates for Superconducting Qubits Assisted by a Driven Resonator
• Quantifying multiparticle entanglement with randomized measurements
• Exploring Many-body Interactions Through Quantum Fisher Information
• Direct pulse-level compilation of arbitrary quantum logic gates on superconducting qutrits
• Linear Response for pseudo-Hermitian Hamiltonian Systems: Application to PT-Symmetric Qubits
• An engineering guide to superconducting quantum circuit shielding
• Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe
• Photon assisted tunneling of high order multiple Andreev reflections in epitaxial nanowire Josephson junctions
• Electromotive force in driven topological quantum circuits
• Many-body quantum dynamics of spin-orbit coupled Andreev states in a Zeeman field
• Zeno physics of the Ising chain with symmetry-breaking boundary dephasing
• On-Chip Detection of Electronuclear Transitions in the ${}^{155,157}$Gd Multilevel Spin System
• Conservation of Angular Momentum in the Elastic Medium with Spins
• Measurement and feed-forward correction of the fast phase noise of lasers
• Superconducting Quantum Simulation for Many-Body Physics beyond Equilibrium
• Integrability breaking and bound states in Google's decorated XXZ circuits
• Dielectric Loss due to Charged-Defect Acoustic Phonon Emission
• Noise Classification in Three-Level Quantum Networks by Machine Learning
• Why Superconducting Ta Qubits Have Fewer Tunneling Two-Level Systems at the Air-Oxide Interface Than Nb Qubits
• Generalized transmon Hamiltonian for Andreev spin qubits
• Entanglement dynamics of a dc SQUID interacting with a single-mode radiation field
• Topological physics in quantum critical systems
• Observing quantum many-body scars in random quantum circuits
• Majorana Zero Modes in Nanowires with Combined Triangular and Hexagonal Geometry
• Nearly optimal time-independent reversal of a spin chain
• Two-photon Interface of Nuclear Spins Based on the Opto-Nuclear Quadrupolar Effect
• Optical Direct Write of Dolan--Niemeyer-Bridge Junctions for Transmon Qubits
• Shortcuts to Adiabaticity for Fast Qubit Readout in Circuit Quantum Electrodynamics
• Coherence of an Electronic Two-Level System under Continuous Charge Sensing by a Quantum Dot Detector
• Snakes and Ladders: Adapting the surface code to defects
• Improved superconducting qubit state readout by path interference
• Soliton versus single photon quantum dynamics in arrays of superconducting qubits
• Semiconductor-based electron flying qubits: Review on recent progress accelerated by numerical modelling
• Shallow quantum circuits for efficient preparation of Slater determinants and correlated states on a quantum computer
• Density Matrix Renormalization Group Study of Domain Wall Qubits
• Bit-flip errors in dissipative cat qubits: second-order perturbation theory
• Material matters in superconducting qubits
• The nontrivial effects of annealing on superconducting properties of Nb single crystals
• Minimal Time Robust Control for Two Superconducting Qubits
• Optimally robust shortcuts to population inversion in cat-state qubits
• Effective field theory of random quantum circuits
• Transport theory for topological Josephson junctions with a Majorana qubit
• Comparing planar quantum computing platforms at the quantum speed limit
• Richardson model with complex level structure and spin-orbit coupling for hybrid superconducting islands: stepwise suppression of pairing and magnetic pinning
• Epitaxial α-Ta (110) film on a-plane sapphire substrate for superconducting qubits on wafer scale
• Phase transitions induced by standard and predetermined measurements in transmon arrays
• Nanoscale addressing and manipulation of neutral atoms using electromagnetically induced transparency
• Fermionic quantum computation with Cooper pair splitters
• Geometry dependence of TLS noise and loss in a-SiC:H parallel plate capacitors for superconducting microwave resonators
• Heat-based circuits using quantum rectification
• A quantum logic gate for free electrons
• Strong coupling between a single-photon and a two-photon Fock state
• Flux-charge symmetric theory of superconducting circuits
• Scalable Parity Architecture With a Shuttling-Based Spin Qubit Processor
• Two-dimensional correlation propagation dynamics with a cluster discrete phase-space method
• Code Properties of the Holographic Sierpinski Triangle
• Optimal linear optical discrimination of Bell-like states
• Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums
• Non-reciprocal population dynamics in a quantum trimer
• Approximate inverse measurement channel for shallow shadows
• Nonequilibrium regimes for quasiparticles in superconducting qubits with gap-asymmetric junctions
• Artificially intelligent Maxwell's demon for optimal control of open quantum systems
• Compiling the surface code to crossbar spin qubit architectures
• Observation and mitigation of microwave echoes from dielectric defects in Josephson traveling wave amplifiers
• Single-Qubit Gates Beyond the Rotating-Wave Approximation for Strongly Anharmonic Low-Frequency Qubits
• The Role of Quantum Computing in Advancing Scientific High-Performance Computing: A perspective from the ADAC Institute
• Topological states in qubit arrays induced by density-dependent coupling
• Nuclear Electric Resonance for Spatially-Resolved Spin Control via Pulsed Optical Excitation in the UV-Visible Spectrum
• Quasiparticle Dynamics in Superconducting Quantum-Classical Hybrid Circuits
• Characterization of Asymmetric Gap-Engineered Josephson Junctions and 3D Transmon Qubits
• Stable and low loss oxide layer on α-Ta (110) film for superconducting qubits
• Low barrier ZrO${}_x$-based Josephson junctions
• Tunable spectral narrowing enabling the functionality of graphene qubit circuits at room temperature
• Autonomous Quantum Processing Unit: An Autonomous Thermal Computing Machine & its Physical Limitations
• Quasiparticle spectroscopy in technologically-relevant niobium using London penetration depth measurements
• Harnessing Quantum Computing for Energy Materials: Opportunities and Challenges
• Stochastic theory of nonlinear electrical circuits in thermal equilibrium
• Multithreaded parallelism for heterogeneous clusters of QPUs
• Two-dimensional topological effect in a transmon qubit array with tunable couplings
• Above 99.9% Fidelity Single-Qubit Gates, Two-Qubit Gates, and Readout in a Single Superconducting Quantum Device
• Detecting Hidden Order in Fractional Chern Insulators
• Nonlocal Josephson diode effect in minimal Kitaev chains
• Suppressing chaos with mixed superconducting qubit devices
• Proximal quantum control of spin and spin ensemble with highly localized control field from skyrmions
• One-step implementation of nonadiabatic geometric fSim gate in superconducting circuits
• Spontaneous symmetry breaking in a $SO(3)$ non-Abelian lattice gauge theory in $2+1$D with quantum algorithms
• Frozonium: Freezing Anharmonicity in Floquet Superconducting Circuits
• Identification of soft modes in amorphous Al${}_2$O${}_3$ via first-principles
• Real-time Sign-Problem-Suppressed Quantum Monte Carlo Algorithm For Noisy Quantum Circuit Simulations
• Microwave dynamics of gated Al/InAs superconducting nanowires
• Decoupling of External and Internal Dynamics in Driven Two-level Systems
• The quartic Blochnium: an anharmonic quasicharge superconducting qubit
• Topological Phases of Many-Body Localized Systems: Beyond Eigenstate Order
• Efficient preparation of the AKLT State with Measurement-based Imaginary Time Evolution
• Tantalum thin films sputtered on silicon and on different seed layers: material characterization and coplanar waveguide resonator performance
• Anomalous Loss Reduction Below Two-Level System Saturation in Aluminum Superconducting Resonators
• Measuring multipartite quantum correlations by thermodynamic work extraction
• Quantum Sensing Using Atomic Clocks for Nuclear and Particle Physics
• Quantum noise modeling through Reinforcement Learning
• Vantablack Shielding of Superconducting Qubit Systems
• Time-optimal multi-qubit gates: Complexity, efficient heuristic and gate-time bounds
• Nonlinear response theory for lossy superconducting quantum circuits
• Variational Quantum Gate Optimization at the Pulse Level
• Thermal control across a chain of electronic nanocavities
• Quantum coherence of a long-lifetime exciton-polariton condensate
• Current Conservation in the Self-Consistent Josephson Junction
• Quantum Delocalised-Interactions
• Nonvolatile Cryogenic Phase Slip Memory with Single-Shot Readout
• Optimizing for periodicity: a model-independent approach to flux crosstalk calibration for superconducting circuits
• Quantum computing hardware in the cloud: Should a computational chemist care?
• Learning interactions between Rydberg atoms
• Extended Josephson junction qubit system
• A superconductor free of quasiparticles for seconds
• An Energy Estimation Benchmark for Quantum Computers
• Scalable low-latency entanglement distribution for distributed quantum computing
• Manipulation of magnetic systems by quantized surface acoustic wave via piezomagnetic effect
• Quantum Simulation of the Dissipative Anderson Model
• Optical and Raman selection rules for odd-parity clean superconductors
• Observation of the Josephson effect in superhydrides: DC SQUID based on (La,Ce)H${}_{10+x}$ with operating temperature of 179 K
• Preparing spin-squeezed states in Rydberg atom arrays via quantum optimal control
• Model for 1/f Flux noise in Superconducting Aluminum Devices: Impact of External Magnetic Fields
• Quantum hyperspins: Highly nonclassical collective behavior in quantum optical parametric oscillators
• Scalable quantum simulator with an extended gate set in giant atoms
• Quantum simulations of complex systems
• Low-loss Nb on Si superconducting resonators from a dual-use spintronics deposition chamber and with acid-free post-processing
• Flexible Readout and Unconditional Reset for Superconducting Multi-Qubit Processors with Tunable Purcell Filters
• Quantum dynamics of semiconductor quantum dot Josephson junctions
• Dielectric microwave resonator with large optical apertures for spin-based quantum devices
• Nonclassical radiation from a nonlinear oscillator driven solely by classical $1/f$ noise
• Absorbing state phase transitions beyond directed percolation in dissipative quantum state preparation
• Tutorial on Superconducting Quantum Circuits: From Basics to Applications
• Assessment of valley coherence in a high-quality monolayer molybdenum diselenide
• Building Bridges in Quantum Information Science Education: Expert Insights to Guide Framework Development for Interdisciplinary Teaching and Evolution of Common Language
• Benchmarking the performance of a high-Q cavity qudit using random unitaries
• Single-photon scattering on a two-qubit system. Spatio-temporal structure of the scattered field
• Do we have a quantum computer? Expert perspectives on current status and future prospects
• Out-of-equilibrium nonlinear model of thermoelectricity in superconducting tunnel junctions
• Qubit dephasing by spectrally diffusing quantum two-level systems
• High temporal stability of niobium superconducting resonators by surface passivation with organophosphonate self-assembled monolayers
• Parameter optimization for the unimon qubit
• Current dependence of the low bias resistance of small capacitance Josephson junctions
• Systematic Schrieffer-Wolff-transformation approach to Josephson junctions: quasiparticle effects and Josephson harmonics
• On-Demand Microwave Single-Photon Source Based on Tantalum Thin Film
• Practical quantum error correction with the XZZX code and Kerr-cat qubits
• Open-loop quantum control of small-size networks for high-order cumulants and cross-correlations sensing
• Quantum Computing Beyond Ground State Electronic Structure: A Review of Progress Toward Quantum Chemistry Out of the Ground State
• Improving quantum state detection with adaptive sequential observations
• Intermodulation spectroscopy and the nonlinear response of two-level systems in superconducting coplanar waveguide resonators
• Quantum Coherence in Superconducting Vortex States
• Critical Exponent of Dynamical Quantum Phase Transition in One-Dimensional Bose-Hubbard Model in the Strong Interacting Limit
• In-situ Investigation of the Phase Formation and Superconductivity in V${}_3$Si Thin Films at High Temperatures
• Dynamics of measurement-induced state transitions in superconducting qubits
• Comparative Study of Quantum Transpilers: Evaluating the Performance of qiskit-braket-provider, qBraid-SDK, and Pytket Extensions
• Proposal for realizing quantum-spin systems on a two-dimensional square lattice with Dzyaloshinskii-Moriya interaction by Floquet engineering using Rydberg atoms
• Determining the ability for universal quantum computing: Testing controllability via dimensional expressivity
• Theory of quasiparticle generation by microwave drives in superconducting qubits
• Operation of a high-frequency, phase-slip qubit
• Generation of time-frequency entangled photon pairs propagating in separate waveguides in circuit QED setup
• Synthetic fractional flux quanta in a ring of superconducting qubits
• Epitaxial titanium nitride microwave resonators: Structural, chemical, electrical, and microwave properties
• Clock Transitions Generated by Defects in Silica Glass
• Post-measurement Quantum Monte Carlo
• Electron-phonon heat transfer in giant vortex states
• Qubit based on spin-singlet Yu-Shiba-Rusinov states
• Mesoscopic theory of the Josephson junction
• Theory-independent monitoring of the decoherence of a superconducting qubit with generalized contextuality
• Leakage Mobility in Superconducting Qubits as a Leakage Reduction Unit
• Sparse Non-Markovian Noise Modeling of Transmon-Based Multi-Qubit Operations
• Digital Quantum Simulations of the Non-Resonant Open Tavis-Cummings Model
• Utilizing Quantum Processor for the Analysis of Strongly Correlated Materials
• Partial thermalisation of a two-state system coupled to a finite quantum bath
• Highly efficient microwave storage and retrieval using a superconducting chiral $\Lambda$-type molecule
• Quantum Rabi interferometry of motion and radiation
• Hybrid quantum surface acoustic wave with skyrmion qubit for quantum information processing
• Probing the topology of the two-photon bands via time-dependent quantum walks
• Optimal quantum resource generation in coupled transmons immersed in Markovian baths
• Tight-Binding Energy-Phase Calculation for Topological Josephson Junction Nanowire Architecture
• ScarFinder: a detector of optimal scar trajectories in quantum many-body dynamics
• Probing Complex Decoherence Processes in Materials for Quantum Applications
• Non-demolition fluorescence readout and high-fidelity unconditional reset of a fluxonium qubit via dissipation engineering
• Robustness Enhancement of Universal Noncyclic Geometric Gates via Evolution Optimization
• Environmental Quantum States Trigger Emission in Nonlinear Photonics
• Tuning the the fundamental periodicity of the current-phase relation in multiterminal diffusive Josephson junctions
• Fourier-style Quantum State Tomography and Purity Measurement of a Multi-qubit System from Bloch Rotations
• Adaptive random compiler for Hamiltonian simulation
• Quantum state tomography as a numerical optimization problem
• Quantum-to-Classical Transition via Single-Shot Generalized Measurements
• Enhancing Coherence with a Clock Transition and Dynamical Decoupling in the Cr${}_7$Mn Molecular Nanomagnet
• The Josephson effect in Fibonacci superconductors
• Building globally controlled quantum processors with ZZ interactions
• Overcoming disorder in superconducting globally driven quantum computing
• Optimal sampling of tensor networks targeting wave function's fast decaying tails
• State-insensitive wavelengths for light shifts and photon scattering from Zeeman states
• A Fractional Calculus Framework for Open Quantum Dynamics: From Liouville to Lindblad to Memory Kernels
• Noise-Assisted Metastability: From Lévy Flights to Memristors, Quantum Escape, and Josephson-based Axion Searches
• Loss-induced quantum nonreciprocity and entanglement in superconducting qubits
• Skyrmionic qubits stabilized by Dzyaloshinskii-Moriya interaction as platforms for qubits and quantum gates
• Integration of topological insulator Josephson junctions in superconducting qubit circuits
• Quantum simulation of entanglement dynamics in a quantum processor
• Colossal Cryogenic Electro-Optic Response Through Metastability in Strained BaTiO${}_3$ Thin Films
• Quantum correlation generation capability of experimental processes
• Resilient superconducting-element design with genetic algorithms
• Topological phases in interacting spin-1 systems
• Cooper-pair splitters as circuit elements for realizing topological superconductors
• Systematic Characterization of Transmon Qubit Stability with Thermal Cycling
• Protocol for Purifying Noisy Preparation and Measurements of Qubits
• Temperature-Dependent Dielectric Function of Tantalum Nitride Formed by Atomic Layer Deposition for Tunnel Barriers in Josephson Junctions
• Efficient electron transfer in quantum dot chains controlled by a cubic detuning profile via shortcuts to adiabaticity
• Novel permanent magnet array geometries for scalable trapped-ion quantum computing in a laser-free entanglement architecture
• Engineering Strong Beamsplitter Interaction between Bosonic Modes via Quantum Optimal Control Theory
• Orbital-Angular-Momentum Entangled Photon Emission from Circular Currents in Semiconductor-Superconductor Structures
• Toward quantum interconnects featuring nanometer-to-picometer bandwidth compression and THz-range quantum frequency conversion
• Drastic effect of weak interaction near special points in semiclassical multiterminal superconducting nanostructures
• A fluxonium qubit-based hybrid electromechanical system
• Universally Robust Control of Open Quantum Systems
• Automated Graph-Based Detection of Quantum Control Schemes: Application to Molecular Laser Cooling
• Submicrometer tunnel ferromagnetic Josephson junctions with transmon energy scale
• Andreev molecules at distance
• Mediated interactions beyond the nearest neighbor in an array of superconducting qubits
• Ultimate quantum limit for amplification: a single atom in front of a mirror
• Two-Polariton Blockade via Ultrastrong Light-Matter Coupling
• Designing gate operations for single ion quantum computing in rare-earth-ion-doped crystals
• Peratic Phase Transition by Bulk-to-Surface Response
• Learning mixed quantum states in large-scale experiments
• POPQC: Parallel Optimization for Quantum Circuits (Extended Version)
• Quantum-Classical Computing for Time-Dependent Ion-Atom Collision Dynamics: Applications to Charge Transfer Cross Section Simulations
• Computed models of natural radiation backgrounds in qubits and superconducting detectors
• Ptychographic estimation of pure multiqubit states in a quantum device
• Bi-Josephson Effect in a Driven-Dissipative Supersolid
• Digital quantum simulation of squeezed states via enhanced bosonic encoding in a superconducting quantum processor
• Broadband and high-precision two-level system loss measurement using superconducting multi-wave resonators
• Phonon- and magnon-mediated decoherence of a magnonic qubit
• Persistent-current states originating from the Hilbert space fragmentation in momentum space
• Quantum Routing and Entanglement Dynamics Through Bottlenecks
• Aluminum air bridges for superconducting quantum devices realized using a single step electron-beam lithography process
• A hybrid ferromagnetic transmon qubit: circuit design, feasibility and detection protocols for magnetic fluctuations
• Towards a $\cos (2\phi )$ Josephson element using aluminum junctions with well-transmitted channels
• Neural Network Based Qubit Environment Characterization
• Feedforward suppression of readout-induced faults in quantum error correction
• Effects of the thin-film thickness on superconducting NbTi microwave resonators for on-chip cryogenic thermometry
• The Virtual Quantum Device (VQD): A tool for detailed emulation of quantum computers
• Benchmarking quantum devices beyond classical capabilities
• Supercorrelated decay in a quasiperiodic nonlinear waveguide: From Markovian to non-Markovian transitions
• Quantum fingerprints of self-organization in spin chains coupled to a Kuramoto model
• Simulated Randomized Benchmarking of a Dynamically Corrected Cross-Resonance Gate
• Quantum memory assisted observable estimation
• Entropy exchange and thermal fluctuations in the Jaynes-Cummings model
• Low Overhead Quantum Bus with Coupling beyond the Nearest Neighbor via Mediated Effective Capacitance
• Inverse Superconductor-Insulator Transition in Weakly Monitored Josephson Junction Arrays
• Principle of learning sign rules by neural networks in qubit lattice models
• Tunneling Hamiltonian analysis of DC Josephson currents in a weakly-interacting Bose-Einstein condensate
• Magnetic anisotropy effect on stabilizing magnetization plateaus of kagome strip chain Heisenberg antiferromagnets
• Spin squeezing from bilinear spin-spin interactions: two simple theorems
• Interacting Defects Generate Stochastic Fluctuations in Superconducting Qubits
• Equilibration of Non-interacting Photons and Quantum Signatures of Chaos
• Non-abelian Geometric Quantum Energy Pump
• Engineered Robustness for Nonadiabatic Geometric Quantum Gates
• Kramers-protected hardware-efficient error correction with Andreev spin qubits
• Spontaneous emission of a three-level artificial atom in a one-dimensional open waveguide
• Spin-spiral instability of the Nagaoka ferromagnet in the crossover between square and triangular lattices
• Fluctuation-guided adaptive random compiler for Hamiltonian simulation
• Sub-Bath Cooling in Bosonic Systems: Gaussian Constraints and Non-Gaussian Enhancements
• Refrigeration of a 1D gas of microwave photons
• Generation of Volume-Law Entanglement by Local-Measurement-Only Quantum Dynamics
• Robust and Parallel Control of Many Qubits
• Determination of the current-phase relation of an InAs 2DEG Josephson junction with a microwave resonator
• Spontaneous decay of artificial atoms in a three-qubit system