A simple all-microwave entangling gate for fixed-frequency superconducting qubits

Abstract

We demonstrate an all-microwave two-qubit gate on superconducting qubits which are fixed in frequency at optimal bias points. The gate requires no additional subcircuitry and is tunable via the amplitude of microwave irradiation on one qubit at the transition frequency of the other. We use the gate to generate entangled states with a maximal extracted concurrence of 0.88 and quantum process tomography reveals a gate fidelity of 81%.

References in corpus (14)

• Coupling Superconducting Qubits via a Cavity Bus
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Fault-tolerant quantum computation with high threshold in two dimensions
• Simple pulses for elimination of leakage in weakly nonlinear qubits
• Coherent quantum state storage and transfer between two phase qubits via a resonant cavity
• Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits
• Two-Qubit State Tomography using a Joint Dispersive Read-Out
• Microwave-induced coupling of superconducting qubits
• Tunable coupling in circuit quantum electrodynamics with a superconducting V-system
• Parametric coupling for superconducting qubits
• Demonstration of a Tuneable Coupler for Superconducting Qubits Using Coherent, Time Domain, Two-Qubit Operations
• High-fidelity gates in a Josephson qubit
• Selective darkening of degenerate transitions demonstrated with two superconducting quantum bits
• Wirebond crosstalk and cavity modes in large chip mounts for superconducting qubits

Cited by in corpus (276)

• Hardware-efficient Variational Quantum Eigensolver for Small Molecules and Quantum Magnets
• Circuit Quantum Electrodynamics
• A Quantum Engineer's Guide to Superconducting Qubits
• Superconducting Qubits: Current State of Play
• Microwave photonics with superconducting quantum circuits
• Evaluating analytic gradients on quantum hardware
• Quantum information processing with superconducting circuits: a review
• Extending the computational reach of a noisy superconducting quantum processor
• Quantum optimization using variational algorithms on near-term quantum devices
• Building logical qubits in a superconducting quantum computing system
• Quantum Error Mitigation
• Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
• Efficient Z-Gates for Quantum Computing
• Experimental Comparison of Two Quantum Computing Architectures
• Procedure for systematically tuning up crosstalk in the cross resonance gate
• 10-qubit entanglement and parallel logic operations with a superconducting circuit
• A tunable coupling scheme for implementing high-fidelity two-qubit gates
• qubit-ADAPT-VQE: An adaptive algorithm for constructing hardware-efficient ansatze on a quantum processor
• Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits
• Superconducting Quantum Computing: A Review
• Decoherence benchmarking of superconducting qubits
• Circuit QED lattices: towards quantum simulation with superconducting circuits
• A universal gate for fixed-frequency qubits via a tunable bus
• Implementing a strand of a scalable fault-tolerant quantum computing fabric
• Maximum Likelihood, Minimum Effort
• Quantum Information Scrambling in a Superconducting Qutrit Processor
• Software Mitigation of Crosstalk on Noisy Intermediate-Scale Quantum Computers
• Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit
• Experimental demonstration of fault-tolerant state preparation with superconducting qubits
• Process verification of two-qubit quantum gates by randomized benchmarking
• Scalable error mitigation for noisy quantum circuits produces competitive expectation values
• Laser-annealing Josephson junctions for yielding scaled-up superconducting quantum processors
• High-fidelity, high-scalability two-qubit gate scheme for superconducting qubits
• Parametrically Activated Entangling Gates Using Transmon Qubits
• Demonstration of weight-four parity measurements in the surface code architecture
• Emerging quantum computing algorithms for quantum chemistry
• Topological and subsystem codes on low-degree graphs with flag qubits
• Tunable Superconducting Qubits with Flux-Independent Coherence
• A fast, low-leakage, high-fidelity two-qubit gate for a programmable superconducting quantum computer
• Perfect quantum state transfer in a superconducting qubit chain with parametrically tunable couplings
• First-order sideband transitions with flux-driven asymmetric transmon qubits
• Demonstration of a High-Fidelity CNOT for Fixed-Frequency Transmons with Engineered ZZ Suppression
• Quantum--Classical Interface Based on Single Flux Quantum Digital Logic
• Qiskit Pulse: Programming Quantum Computers Through the Cloud with Pulses
• Entanglement of two superconducting qubits in a waveguide cavity via monochromatic two-photon excitation
• Implementation of Conditional-Phase Gates based on tunable ZZ-Interactions
• Experimental demonstration of a resonator-induced phase gate in a multi-qubit circuit QED system
• Verifying Multipartite Entangled GHZ States via Multiple Quantum Coherences
• Reducing unitary and spectator errors in cross resonance with optimized rotary echoes
• Quantum computers as universal quantum simulators: state-of-art and perspectives
• First-principles analysis of cross-resonance gate operation
• Microwave-activated conditional-phase gate for superconducting qubits
• Noisy intermediate-scale quantum computers
• Quantum Simulation of Open Quantum Systems Using a Unitary Decomposition of Operators
• Characterization of a two-transmon processor with individual single-shot qubit readout
• Quantum Solver of Contracted Eigenvalue Equations for Scalable Molecular Simulations on Quantum Computing Devices
• Experimental Deep Reinforcement Learning for Error-Robust Gateset Design on a Superconducting Quantum Computer
• Tutorial: Gate-based superconducting quantum computing
• Suppression of Unwanted $ZZ$ Interactions in a Hybrid Two-Qubit System
• Tunable coupler for realizing a controlled-phase gate with dynamically decoupled regime in a superconducting circuit
• First-order sidebands in circuit QED using qubit frequency modulation
• Operation and intrinsic error budget of a two-qubit cross-resonance gate
• High-fidelity three-qubit iToffoli gate for fixed-frequency superconducting qubits
• Measuring Analytic Gradients of General Quantum Evolution with the Stochastic Parameter Shift Rule
• Improving quantum gate fidelities by using a qubit to measure microwave pulse distortions
• High-contrast ZZ interaction using superconducting qubits with opposite-sign anharmonicity
• A perspective on scaling up quantum computation with molecular spins
• Surface code with decoherence: An analysis of three superconducting architectures
• Scalable High-Performance Fluxonium Quantum Processor
• Observation of topological Uhlmann phases with superconducting qubits
• Triangular color codes on trivalent graphs with flag qubits
• High-fidelity CZ gate for resonator-based superconducting quantum computers
• Optimal control theory for a unitary operation under dissipative evolution
• Pulse-efficient circuit transpilation for quantum applications on cross-resonance-based hardware
• Nonadiabatic geometric quantum computation with parametrically tunable coupling
• Global optimization of quantum dynamics with AlphaZero deep exploration
• Quantum crosstalk cancellation for fast entangling gates and improved multi-qubit performance
• Integrated tool-set for Control, Calibration and Characterization of quantum devices applied to superconducting qubits
• Calibration of the cross-resonance two-qubit gate between directly-coupled transmons
• Steady state entanglement of two superconducting qubits engineered by dissipation
• Benchmarking the noise sensitivity of different parametric two-qubit gates in a single superconducting quantum computing platform
• Hybrid quantum linear equation algorithm and its experimental test on IBM Quantum Experience
• Charting the circuit QED design landscape using optimal control theory
• Demonstration of a Parametrically-Activated Entangling Gate Protected from Flux Noise
• Compressed sensing quantum process tomography for superconducting quantum gates
• Pulsed reset protocol for fixed-frequency superconducting qubits
• Optimized pulse shapes for a resonator-induced phase gate
• Broadband Filters for Abatement of Spontaneous Emission in Circuit Quantum Electrodynamics
• Optimized controlled Z gates for two superconducting qubits coupled through a resonator
• Error analysis in suppression of unwanted qubit interactions for a parametric gate in a tunable superconducting circuit
• Fast logic with slow qubits: microwave-activated controlled-Z gate on low-frequency fluxoniums
• Simulating the dynamics of braiding of Majorana zero modes using an IBM quantum computer
• Coupling a single electron spin to a microwave resonator: Controlling transverse and longitudinal couplings
• Quantum-classical hybrid algorithm using an error-mitigating $N$-representability condition to compute the Mott metal-insulator transition
• Leakage detection for a transmon-based surface code
• Fast parametric two-qubit gates with suppressed residual interaction using a parity-violated superconducting qubit
• Programmable Heisenberg interactions between Floquet qubits
• Microcavity controlled coupling of excitonic qubits
• Subspace Variational Quantum Simulator
• Optimized cross-resonance gate for coupled transmon systems
• Gate-error analysis in simulations of quantum computers with transmon qubits
• Fast multi-qubit gates through simultaneous two-qubit gates
• Analytic gradients in variational quantum algorithms: Algebraic extensions of the parameter-shift rule to general unitary transformations
• Entangling superconducting qubits in a multi-cavity system
• Generalized quantum circuit differentiation rules
• Realizing a Circuit Analog of an Optomechanical System with Longitudinally Coupled Superconducting Resonators
• Optimizing resource efficiencies for scalable full-stack quantum computers
• Demonstration of quantum volume 64 on a superconducting quantum computing system
• Overlap junctions for high coherence superconducting qubits
• Approaching the theoretical limit in quantum gate decomposition
• Proposal for a nanomechanical qubit
• High-fidelity resonator-induced phase gate with single-mode squeezing
• Floquet engineering in superconducting circuits: from arbitrary spin-spin interactions to the Kitaev honeycomb model
• A programmable three-qubit superconducting processor with all-to-all connectivity
• Preparation of Subradiant States using Local Qubit Control in Circuit QED
• Resolving Correlated States of Benzyne on a Quantum Computer with an Error-Mitigated Quantum Contracted Eigenvalue Solver
• Coupler-Assisted Controlled-Phase Gate with Enhanced Adiabaticity
• Realization of High-Fidelity CZ Gate based on a Double-Transmon Coupler
• Two-qubit controlled-PHASE Rydberg blockade gate protocol for neutral atoms via off-resonant modulated driving within a single pulse
• Calibration of flux crosstalk in large-scale flux-tunable superconducting quantum circuits
• Simulating and mitigating crosstalk
• Decoherence control: Universal protection of two-qubit states and two-qubit gates using continuous driving fields
• Perturbation impact of spectators on a cross-resonance gate in a tunable coupling superconducting circuit
• Resource-Efficient Quantum Computing by Breaking Abstractions
• Strengthening weak measurements of qubit out-of-time-order correlators
• Microwave-Activated Controlled-Z Gate for Fixed-Frequency Fluxonium Qubits
• Extendibility limits the performance of quantum processors
• Absolutely Stable Spatiotemporal Order in Noisy Quantum Systems
• High Coherence Plane Breaking Packaging for Superconducting Qubits
• Preparation of an Exciton Condensate of Photons on a 53-Qubit Quantum Computer
• Dynamical decoupling and dephasing in interacting two-level systems
• Engineered thermalization and cooling of quantum many-body systems
• Engineering dissipation with resistive elements in circuit quantum electrodynamics
• Modeling Noisy Quantum Circuits Using Experimental Characterization
• Local Sensing with the Multi-Level AC Stark Effect
• Accurate methods for the analysis of strong-drive effects in parametric gates
• Long-range connectivity in a superconducting quantum processor using a ring resonator
• Randomized compiling for scalable quantum computing on a noisy superconducting quantum processor
• Optimal control of two qubits via a single cavity drive in circuit quantum electrodynamics
• Robustness of error-suppressing entangling gates in cavity-coupled transmon qubits
• Bath-induced collective phenomena on superconducting qubits: synchronization, subradiance, and entanglement generation
• Hessian-based optimization of constrained quantum control
• Realizing the Nishimori transition across the error threshold for constant-depth quantum circuits
• Quantum advantage for computations with limited space
• Bootstrapping quantum process tomography via a perturbative ansatz
• Suppressing ZZ Crosstalk of Quantum Computers through Pulse and Scheduling Co-Optimization
• Optimal control for fast and high-fidelity quantum gates in coupled superconducting flux qubits
• Experimental implementation of non-Clifford interleaved randomized benchmarking with a controlled-S gate
• Enhancing quantum utility: simulating large-scale quantum spin chains on superconducting quantum computers
• Native two-qubit gates in fixed-coupling, fixed-frequency transmons beyond cross-resonance interaction
• Selective darkening of degenerate transitions for implementing quantum controlled-NOT gates
• Analytically parameterized solutions for robust quantum control using smooth pulses
• Single Shot i-Toffoli Gate in Dispersively Coupled Superconducting Qubits
• Entanglement and Quantum Error Correction with Superconducting Qubits
• Implementation of a generalized CNOT gate between fixed-frequency transmons
• Cross cross resonance gate
• Experimental Data from a Quantum Computer Verifies the Generalized Pauli Exclusion Principle
• Digital-Analog Quantum Simulations Using The Cross-Resonance Effect
• A steady state quantum classifier
• Proposal for entangling gates on fluxonium qubits via a two-photon transition
• Two-qubit gate operations in superconducting circuits with strong coupling and weak anharmonicity
• High-Fidelity Control of Superconducting Qubits Using Direct Microwave Synthesis in Higher Nyquist Zones
• Quantum Circuit Engineering for Correcting Coherent Noise
• Correcting non-independent and non-identically distributed errors with surface codes
• Multi-frequency modes in superconducting resonators: Bridging frequency gaps in off-resonant couplings
• Evaluation of Parameterized Quantum Circuits with Cross-Resonance Pulse-Driven Entanglers
• Single-Shot Quantum Process Tomography
• The Basics of Quantum Computing for Chemists
• Finite-size criticality in fully connected spin models on superconducting quantum hardware
• The scattering coefficients of superconducting microwave resonators: I. Transfer-matrix approach
• Implementing general measurements on linear optical and solid-state qubits
• Simultaneously exciting two atoms with photon-mediated Raman interaction
• Extensible 3D architecture for superconducting quantum computing
• Comparison of Cloud-Based Ion Trap and Superconducting Quantum Computer Architectures
• Pulse-efficient quantum machine learning
• CNOT gates for fluxonium qubits via selective darkening of transitions
• Quantum control of frequency tunable transmon superconducting qubits
• All-microwave manipulation of superconducting qubits with a fixed-frequency transmon coupler
• Characterizing non-Markovian Off-Resonant Errors in Quantum Gates
• PANSATZ: Pulse-based Ansatz for Variational Quantum Algorithms
• Tunable coupling of widely separated superconducting qubits: A possible application towards a modular quantum device
• Cooper-Pair Condensates with Non-Classical Long-Range Order on Quantum Devices
• Soft Decoding of a Qubit Readout Apparatus
• Controlled-Z gate for transmon qubits coupled by semiconductor junctions
• Realisation of adiabatic and diabatic CZ gates in superconducting qubits coupled with a tunable coupler
• Symmetry breaking in geometric quantum machine learning in the presence of noise
• Efficient Two-Electron Ansatz for Benchmarking Quantum Chemistry on a Quantum Computer
• Complete characterization of the directly implementable quantum gates used in the IBM quantum processors
• Weakly Flux-Tunable Superconducting Qubit
• Cavity-mediated entanglement of parametrically driven spin qubits via sidebands
• Relaxation of a Stationary State on a Quantum Computer Yields Unique Spectroscopic Fingerprint of the Computer's Noise
• Optimal quantum control via genetic algorithms for quantum state engineering in driven-resonator mediated networks
• Simulation and performance analysis of quantum error correction with a rotated surface code under a realistic noise model
• Environmentally mediated coherent control of a spin qubit in diamond
• Conditional Born machine for Monte Carlo event generation
• Transferring arbitrary d-dimensional quantum states of a superconducting qudit in circuit QED
• Steady-state entanglement generation for non-degenerate qubits
• Always-On Quantum Error Tracking with Continuous Parity Measurements
• Lowering Tomography Costs in Quantum Simulation with a Symmetry Projected Operator Basis
• Optimization of Controlled-Z Gate with Data-Driven Gradient Ascent Pulse Engineering in a Superconducting Qubit System
• Realization of a quantum neural network using repeat-until-success circuits in a superconducting quantum processor
• Decoherence predictions in a superconductive quantum device using the steepest-entropy-ascent quantum thermodynamics framework
• Characterizing a Four-Qubit Planar Lattice for Arbitrary Error Detection
• Implementing generalized measurements with superconducting qubits
• Inverted Singlet-Triplet Qubit Coded on a Two-Electron Double Quantum Dot
• Quantum error mitigation for Fourier moment computation
• Improved qubit bifurcation readout in the straddling regime of circuit QED
• Fast Flux Entangling Gate for Fluxonium Circuits
• A controllable two-qubit swapping gate using superconducting circuits
• Active Learning of Quantum System Hamiltonians yields Query Advantage
• A Toffoli Gate Decomposition via Echoed Cross-Resonance Gates
• Multi-mode superconducting circuits for realizing strongly coupled multi-qubit processor units
• Comparative study of quantum error correction strategies for the heavy-hexagonal lattice
• Development of transmon qubits solely from optical lithography on 300mm wafers
• Fast and differentiable simulation of driven quantum systems
• Exploiting dynamic quantum circuits in a quantum algorithm with superconducting qubits
• Microwave-based Arbitrary CPHASE Gates for Transmon Qubits
• Baseband control of superconducting qubits with shared microwave drives
• Engineering Cross Resonance Interaction in Multi-modal Quantum Circuits
• Benchmarks of Nonclassicality for Qubit Arrays
• Non-perturbative analytical diagonalization of Hamiltonians with application to coupling suppression and enhancement in cQED
• Optimal realization of Yang-Baxter gate on quantum computers
• Role of parasitic interactions and microwave crosstalk in dispersive control of two superconducting artificial atoms
• Classical-Quantum Noise Mitigation for NISQ Hardware
• Co-Designed Architectures for Modular Superconducting Quantum Computers
• High-accuracy Hamiltonian learning via delocalized quantum state evolutions
• Entangled phase of simultaneous fermion and exciton condensations realized
• Entangling interactions between artificial atoms mediated by a multimode left-handed superconducting ring resonator
• Analogue Quantum Simulation with Fixed-Frequency Transmon Qubits
• Parameterized Two-Qubit Gates for Enhanced Variational Quantum Eigensolver
• Probing Quantum Telecloning on Superconducting Quantum Processors
• Remote Cross-resonance Gate between Superconducting Fixed-frequency Qubits
• Quantum process inference for a single qubit Maxwell's demon
• Fast ZZ-Free Entangling Gates for Superconducting Qubits Assisted by a Driven Resonator
• Ultrastrong coupling in a scalable design for circuit QED with superconducting flux qubits
• Minimal Time Robust Control for Two Superconducting Qubits
• Inverted-circuit zero-noise extrapolation for quantum gate error mitigation
• Robustness of longitudinal transmon readout to ionization
• MIRAGE: Quantum Circuit Decomposition and Routing Collaborative Design using Mirror Gates
• Supercomputer simulations of transmon quantum computers
• Capacitively Shunted Double-Transmon Coupler Realizing Bias-Free Idling and High-Fidelity CZ Gate
• Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums
• Cross-platform hardware benchmark of style-based quantum GANs for data augmentation on superconducting and trapped-ion processors
• Quantum compiling with a variational instruction set for accurate and fast quantum computing
• Multi-qubit DC gates over an inhomogeneous array of quantum dots
• Accurate and Honest Approximation of Correlated Qubit Noise
• Measuring NISQ Gate-Based Qubit Stability Using a 1+1 Field Theory and Cycle Benchmarking
• Noise tailoring for Robust Amplitude Estimation
• Generic eigenstate preparation via measurement-based purification
• The resource cost of large scale quantum computing
• Fast microwave-driven two-qubit gates between fluxonium qubits with a transmon coupler
• Correcting noisy quantum gates with shortcuts to adiabaticity
• Variational Quantum Gate Optimization at the Pulse Level
• Cross-resonance control of an oscillator with an auxiliary fluxonium qubit
• Asymmetry of CNOT gate operation in superconducting transmon quantum processors using cross-resonance entangling
• Parallel Driving for Fast Quantum Computing Under Speed Limits
• Tuning and Amplifying the Interactions in Superconducting Quantum Circuits with Subradiant Qubits
• Characteristics, Implementation and Applications of Special Perfect Entangler Circuits
• Evaluating the Limits of QAOA Parameter Transfer at High-Rounds on Sparse Ising Models With Geometrically Local Cubic Terms
• Microwave-activated high-fidelity three-qubit gate scheme for fixed-frequency superconducting qubits
• Overhead in Quantum Circuits with Time-Multiplexed Qubit Control
• Gravitational-wave matched filtering on a quantum computer
• Concurrent Fermionic Simulation Gate
• Incoherent Approximation of Leakage in Quantum Error Correction
• Simulated Randomized Benchmarking of a Dynamically Corrected Cross-Resonance Gate
• Iterative Linear Quadratic Regulator for Quantum Optimal Control
• Nonlocal characteristics and argand diagram of two-qubit gates
• Construction of controlled-NOT gate based on microwave-activated phase (MAP) gate in two transmon system
• Current biased gradiometric flux qubit in a circuit-QED architecture
• Review of Superconducting Qubit Devices and Their Large-Scale Integration
• Topological Properties and Characterizations
• Synchronizing two superconducting qubits through a dissipating resonator
• Special-Purpose Quantum Processor Design
• Systematic Construction of Time-Dependent Hamiltonians for Microwave-Driven Josephson Circuits
• Time-frequency-correlated Native CCZ Gate in Superconducting Circuits
• Parity Cross-Resonance: A Multiqubit Gate