Simple pulses for elimination of leakage in weakly nonlinear qubits

Abstract

In realizations of quantum computing, a two-level system (qubit) is often singled out of the many levels of an anharmonic oscillator. In these cases, simple qubit control fails on short time scales because of coupling to leakage levels. We provide an easy to implement analytic formula that inhibits this leakage from any single-control analog or pixelated pulse. It is based on adding a second control that is proportional to the time-derivative of the first. For realistic parameters of superconducting qubits, this strategy reduces the error by an order of magnitude relative to the state of the art, all based on smooth and feasible pulse shapes. These results show that even weak anharmonicity is sufficient and in general not a limiting factor for implementing quantum gates.

4 pages, 4 figures

References in corpus (18)

• Charge insensitive qubit design derived from the Cooper pair box
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Manipulating the Quantum State of an Electrical Circuit
• Coupling Superconducting Qubits via a Cavity Bus
• Quantum Computing with Very Noisy Devices
• Decoherence in Josephson Qubits from Dielectric Loss
• Coherent quantum state storage and transfer between two phase qubits via a resonant cavity
• Demonstration of conditional gate operation using superconducting charge qubits
• Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
• Controlling the spontaneous emission of a superconducting transmon qubit
• Dephasing of a superconducting qubit induced by photon noise
• Randomized benchmarking and process tomography for gate errors in a solid-state qubit
• Double-Occupancy Errors, Adiabaticity, and Entanglement of Spin-Qubits in Quantum Dots
• Fidelity of Single Qubit Maps
• High-fidelity gates in a Josephson qubit
• Optimal control of a leaking qubit
• Optimized single-qubit gates for Josephson phase qubits
• Efficient vibrational state coupling in an optical tilted-washboard potential via multiple spatial translations and application to pulse echo

Cited by in corpus (496)

• Circuit Quantum Electrodynamics
• A Quantum Engineer's Guide to Superconducting Qubits
• Noisy intermediate-scale quantum (NISQ) algorithms
• Superconducting Qubits: Current State of Play
• Strong quantum computational advantage using a superconducting quantum processor
• Shortcuts to adiabaticity: concepts, methods, and applications
• Control of quantum phenomena: Past, present, and future
• Quantum information processing with superconducting circuits: a review
• Extending the computational reach of a noisy superconducting quantum processor
• Training Schrödinger's cat: quantum optimal control
• Quantum computing with atomic qubits and Rydberg interactions: Progress and challenges
• Building logical qubits in a superconducting quantum computing system
• Efficient Z-Gates for Quantum Computing
• Detecting arbitrary quantum errors via stabilizer measurements on a sublattice of the surface code
• A simple all-microwave entangling gate for fixed-frequency superconducting qubits
• 10-qubit entanglement and parallel logic operations with a superconducting circuit
• Efficient measurement of quantum gate error by interleaved randomized benchmarking
• Implementation of a Toffoli Gate with Superconducting Circuits
• Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits
• Rydberg atom quantum technologies
• Stabilizing entanglement autonomously between two superconducting qubits
• Experimental Realization of Non-Abelian Geometric Gates
• Realizing Rapid, High-Fidelity, Single-Shot Dispersive Readout of Superconducting Qubits
• Deterministic Quantum State Transfer and Generation of Remote Entanglement using Microwave Photons
• A Schrodinger Cat Living in Two Boxes
• Deterministic entanglement of superconducting qubits by parity measurement and feedback
• Characterization of addressability by simultaneous randomized benchmarking
• Realization of Deterministic Quantum Teleportation with Solid State Qubits
• Implementing a strand of a scalable fault-tolerant quantum computing fabric
• Detecting bit-flip errors in a logical qubit using stabilizer measurements
• Rapid high-fidelity multiplexed readout of superconducting qubits
• Analytic control methods for high fidelity unitary operations in a weakly nonlinear oscillator
• Comparing, Optimising and Benchmarking Quantum Control Algorithms in a Unifying Programming Framework
• Measuring and Suppressing Quantum State Leakage in a Superconducting Qubit
• Quantum Information Scrambling in a Superconducting Qutrit Processor
• Speeding up adiabatic quantum state transfer by using dressed states
• Digital quantum simulation of spin models with circuit quantum electrodynamics
• Microwave Quantum Link between Superconducting Circuits Housed in Spatially Separated Cryogenic Systems
• Learning-based quantum error mitigation
• Optimal quantum control using randomized benchmarking
• Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit
• Implementing optimal control pulse shaping for improved single-qubit gates
• Process verification of two-qubit quantum gates by randomized benchmarking
• Scalable error mitigation for noisy quantum circuits produces competitive expectation values
• Quantum Computing for High-Energy Physics: State of the Art and Challenges. Summary of the QC4HEP Working Group
• Experimentally simulating the dynamics of quantum light and matter at ultrastrong coupling
• Dipolar Exchange Quantum Logic Gate with Polar Molecules
• Quantum electrodynamics in a topological waveguide
• Scalable quantum circuit and control for a superconducting surface code
• Fast adiabatic qubit gates using only ${\sigma }_z$ control
• A positive tensor network approach for simulating open quantum many-body systems
• Plug-and-Play Approach to Non-adiabatic Geometric Quantum Gates
• Demonstration of quantum advantage in machine learning
• Gradient optimization of analytic controls: the route to high accuracy quantum optimal control
• Quantification and Characterization of Leakage Errors
• Josephson junction-embedded transmission-line resonators: from Kerr medium to in-line transmon
• Fast Universal Control of an Oscillator with Weak Dispersive Coupling to a Qubit
• Leakage reduction in fast superconducting qubit gates via optimal control
• Dissipation-based Quantum Sensing of Magnons with a Superconducting Qubit
• First-order sideband transitions with flux-driven asymmetric transmon qubits
• Control and Tomography of a Three Level Superconducting Artificial Atom
• Silicon quantum processor with robust long-distance qubit couplings
• Single-loop realization of arbitrary non-adiabatic holonomic single-qubit quantum gates in a superconducting circuit
• Quantum--Classical Interface Based on Single Flux Quantum Digital Logic
• Analytically solvable driven time-dependent two-level quantum systems
• Ultracold polar molecules as qudits
• Three Qubit Randomized Benchmarking
• Characterizing errors on qubit operations via iterative randomized benchmarking
• Fluxonium: an alternative qubit platform for high-fidelity operations
• Microwaves in Quantum Computing
• Implementation of Conditional-Phase Gates based on tunable ZZ-Interactions
• Qutrit randomized benchmarking
• Experimental demonstration of a resonator-induced phase gate in a multi-qubit circuit QED system
• High-Fidelity, Frequency-Flexible Two-Qubit Fluxonium Gates with a Transmon Coupler
• Fast readout and reset of a superconducting qubit coupled to a resonator with an intrinsic Purcell filter
• Quantum state preparation, tomography, and entanglement of mechanical oscillators
• A superconducting qubit with Purcell protection and tunable coupling
• Reduced phase error through optimized control of a superconducting qubit
• Adaptive hybrid optimal quantum control for imprecisely characterized systems
• Experimental implementation of universal nonadiabatic geometric quantum gates in a superconducting circuit
• Noisy intermediate-scale quantum computers
• High-Fidelity Single-Shot Toffoli Gate via Quantum Control
• Removing leakage-induced correlated errors in superconducting quantum error correction
• High-fidelity Rydberg quantum gate via a two-atom dark state
• High fidelity two-qubit gates on fluxoniums using a tunable coupler
• Entanglement Metrology Using a Joint Readout of Superconducting Qubits
• Experimental Deep Reinforcement Learning for Error-Robust Gateset Design on a Superconducting Quantum Computer
• Tutorial: Gate-based superconducting quantum computing
• Quantum Simulation of the Ultrastrong Coupling Dynamics in Circuit QED
• Realizing Quantum Convolutional Neural Networks on a Superconducting Quantum Processor to Recognize Quantum Phases
• Decoding Small Surface Codes with Feedforward Neural Networks
• Optimal control methods for fast time-varying Hamiltonians
• High-fidelity controlled-Z gate with maximal intermediate leakage operating at the speed limit in a superconducting quantum processor
• Suppression of Unwanted $ZZ$ Interactions in a Hybrid Two-Qubit System
• Quantum crosstalk analysis for simultaneous gate operations on superconducting qubits
• A scalable superconducting quantum simulator with long-range connectivity based on a photonic bandgap metamaterial
• Tunable coupler for realizing a controlled-phase gate with dynamically decoupled regime in a superconducting circuit
• Quantum process tomography of two-qubit controlled-Z and controlled-NOT gates using superconducting phase qubits
• High-fidelity Rydberg-blockade entangling gate using shaped, analytic pulses
• Improving frequency selection of driven pulses using derivative-based transition suppression
• Arbitrary Control of Entanglement between Two Superconducting Resonators
• Rapid Driven Reset of a Qubit Readout Resonator
• Coping with qubit leakage in topological codes
• Evolution of Nanowire Transmons and Their Quantum Coherence in Magnetic Field
• Non-Gaussian noise spectroscopy with a superconducting qubit sensor
• Surface code with decoherence: An analysis of three superconducting architectures
• Scalable High-Performance Fluxonium Quantum Processor
• Entanglement Stabilization using Parity Detection and Real-Time Feedback in Superconducting Circuits
• Parametric-resonance entangling gates with a tunable coupler
• Overcoming leakage in scalable quantum error correction
• High-fidelity CZ gate for resonator-based superconducting quantum computers
• Nonadiabatic geometric quantum computation with parametrically tunable coupling
• Transmon qubit readout fidelity at the threshold for quantum error correction without a quantum-limited amplifier
• Entanglement generation in superconducting qubits using holonomic operations
• Single qubit gates in frequency-crowded transmon systems
• Quantum dynamics of an electromagnetic mode that cannot contain N photons
• The experimental realization of high-fidelity `shortcut-to-adiabaticity' quantum gates in a superconducting Xmon qubit
• Designing High-Fidelity Single-Shot Three-Qubit Gates: A Machine Learning Approach
• Spin dynamics in a strongly driven system: very slow Rabi oscillations
• Integrated tool-set for Control, Calibration and Characterization of quantum devices applied to superconducting qubits
• Restless Tuneup of High-Fidelity Qubit Gates
• Improving the Performance of Deep Quantum Optimization Algorithms with Continuous Gate Sets
• Quantum logic and entanglement by neutral Rydberg atoms: methods and fidelity
• Benchmarking the noise sensitivity of different parametric two-qubit gates in a single superconducting quantum computing platform
• Relaxing Hardware Requirements for Surface Code Circuits using Time-dynamics
• Charting the circuit QED design landscape using optimal control theory
• Exactly solvable two-level quantum systems and Landau-Zener interferometry
• Demonstration of Controlled-Phase Gates between Two Error-Correctable Photonic Qubits
• Single-step implementation of high fidelity $n$-bit Toffoli gate
• One qubit as a Universal Approximant
• Generation and detection of NOON states in superconducting circuits
• Understanding the effects of leakage in superconducting quantum error detection circuits
• QubiC: An open source FPGA-based control and measurement system for superconducting quantum information processors
• Dual-rail encoding with superconducting cavities
• Entanglement purification and protection in a superconducting quantum network
• Low-Latency Digital Signal Processing for Feedback and Feedforward in Quantum Computing and Communication
• Error analysis in suppression of unwanted qubit interactions for a parametric gate in a tunable superconducting circuit
• Observation of Josephson Harmonics in Tunnel Junctions
• Implementation of a transmon qubit using superconducting granular aluminum
• Variational preparation of finite-temperature states on a quantum computer
• Deep Reinforcement Learning Control of Quantum Cartpoles
• Universal qudit gate synthesis for transmons
• Characterization of Leakage Errors via Randomized Benchmarking
• Fast universal quantum gates on microwave photons with all-resonance operations in circuit QED
• An Introduction to the Transmon Qubit for Electromagnetic Engineers
• Optimal Qubit Control Using Single-Flux Quantum Pulses
• Reducing leakage of single-qubit gates for superconducting quantum processors using analytical control pulse envelopes
• Counteracting systems of diabaticities using DRAG controls: The status after 10 years
• Realization of efficient quantum gates with a superconducting qubit-qutrit circuit
• Demonstration of Adiabatic Variational Quantum Computing with a Superconducting Quantum Coprocessor
• Experimental Realization of Two Qutrits Gate with Tunable Coupling in Superconducting Circuits
• Leakage detection for a transmon-based surface code
• Exact Rotating Wave Approximation
• Fast parametric two-qubit gates with suppressed residual interaction using a parity-violated superconducting qubit
• Programmable Heisenberg interactions between Floquet qubits
• Achieving High-Fidelity Single-Qubit Gates in a Strongly Driven Charge Qubit with $1/f$ Charge Noise
• Optimized electrical control of a Si/SiGe spin qubit in the presence of an induced frequency shift
• Optimized cross-resonance gate for coupled transmon systems
• Analytical approach to swift nonleaky entangling gates in superconducting qubits
• Gate-error analysis in simulations of quantum computers with transmon qubits
• Demonstration of an All-Microwave Controlled-Phase Gate between Far Detuned Qubits
• Quantum-control approach to realizing a Toffoli gate in circuit QED
• Demonstration of quantum volume 64 on a superconducting quantum computing system
• Scalable Hardware-Efficient Qubit Control with Single Flux Quantum Pulse Sequences
• Error per single-qubit gate below $10^{-4}$ in a superconducting qubit
• Error-robust quantum logic optimization using a cloud quantum computer interface
• Overcoming I/O bottleneck in superconducting quantum computing: multiplexed qubit control with ultra-low-power, base-temperature cryo-CMOS multiplexer
• Optimizing for an arbitrary perfect entangler. II. Application
• Quantum communication with time-bin encoded microwave photons
• Observation of the Crossover from Photon Ordering to Delocalization in Tunably Coupled Resonators
• All-Resonant Control of Superconducting Resonators
• Simultaneous gates in frequency-crowded multilevel systems using fast, robust, analytic control shapes
• Suppression of static ZZ interaction in an all-transmon quantum processor
• Floquet quantum simulation with superconducting qubits
• High-fidelity and Robust Geometric Quantum Gates that Outperform Dynamical Ones
• Quantum logic gates for superconducting resonator qudits
• High-fidelity resonator-induced phase gate with single-mode squeezing
• Robust and Fast Holonomic Quantum Gates with Encoding on Superconducting Circuits
• All-microwave leakage reduction units for quantum error correction with superconducting transmon qubits
• A programmable three-qubit superconducting processor with all-to-all connectivity
• Preparation of Subradiant States using Local Qubit Control in Circuit QED
• Characterization of Control in a Superconducting Qutrit Using Randomized Benchmarking
• Dynamics of a two-level system under strong driving: quantum gate optimization based on floquet theory
• Independent, extensible control of same-frequency superconducting qubits by selective broadcasting
• High Coherence in a Tileable 3D Integrated Superconducting Circuit Architecture
• A leakage-resilient approach to fault-tolerant quantum computing with superconducting elements
• Tunable Microwave Single-photon Source Based on Transmon Qubit with High Efficiency
• High-Fidelity Measurement of a Superconducting Qubit using an On-Chip Microwave Photon Counter
• Realization of High-Fidelity CZ Gate based on a Double-Transmon Coupler
• Resonator reset in circuit QED by optimal control for large open quantum systems
• Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings
• Ancilla-free implementation of generalized measurements for qubits embedded in a qudit space
• Number-resolved photocounter for propagating microwave mode
• Experimental benchmarking of an automated deterministic error suppression workflow for quantum algorithms
• A two-fold quantum delayed-choice experiment in a superconducting circuit
• Chip-to-chip entanglement of transmon qubits using engineered measurement fields
• Efficient Generation of the Triplet Bell State Between Coupled Spins Using Transitionless Quantum Driving and Optimal Control
• Error-transparent quantum gates for small logical qubit architectures
• Nonadiabatic Dynamics of a Dissipative Two-level System
• Simulating and mitigating crosstalk
• QuOCS: The Quantum Optimal Control Suite
• Microwave-Activated Controlled-Z Gate for Fixed-Frequency Fluxonium Qubits
• Unimon qubit
• Perturbation impact of spectators on a cross-resonance gate in a tunable coupling superconducting circuit
• Optimal superadiabatic population transfer and gates by dynamical phase corrections
• Systematic Magnus-based approach for suppressing leakage and non-adiabatic errors in quantum dynamics
• Realization of a Universal Quantum Gate Set for Itinerant Microwave Photons
• Optimal control of two qubits via a single cavity drive in circuit quantum electrodynamics
• Comparing Zeeman qubits to hyperfine qubits in the context of the surface code: ${}^{174}$Yb${}^{+}$ and ${}^{171}$Yb${}^{+}$
• Robustness of error-suppressing entangling gates in cavity-coupled transmon qubits
• Optimal control of circuit quantum electrodynamics in one and two dimensions
• Searching for quantum optimal controls in the presence of singular critical points
• Mitigating off-resonant error in the cross-resonance gate
• Geometric phases in superconducting qubits beyond the two-level-approximation
• Hessian-based optimization of constrained quantum control
• Pulse variational quantum eigensolver on cross-resonance based hardware
• Blueprint for quantum computing using electrons on helium
• Fast microwave-driven three-qubit gates for cavity-coupled superconducting qubits
• Engineering Effective Hamiltonians
• Superconducting qubits on silicon substrates for quantum device integration
• Minimum quantum run-time characterization and calibration via restless measurements with dynamic repetition rates
• Analytic Design of Accelerated Adiabatic Gates in Realistic Qubits: General Theory and Applications to Superconducting Circuits
• NMRCloudQ: A Quantum Cloud Experience on a Nuclear Magnetic Resonance Quantum Computer
• Achieving High Fidelity Single Qubit Gates in a Strongly Driven Silicon Quantum Dot Hybrid Qubit
• Recent progress on Majorana in semiconductor-superconductor heterostructures--Engineering and detection
• Suppressing ZZ Crosstalk of Quantum Computers through Pulse and Scheduling Co-Optimization
• Scalable and robust quantum computing on qubit arrays with fixed coupling
• Searching for quantum optimal controls under severe constraints
• Superrobust Geometric Control of a Superconducting Circuit
• Robust quantum gates using smooth pulses and physics-informed neural networks
• On-demand generation and characterization of a microwave time-bin qubit
• Testing quantum fault tolerance on small systems
• Performance of superadiabatic stimulated Raman adiabatic passage in the presence of dissipation and Ornstein-Uhlenbeck dephasing
• Selective darkening of degenerate transitions for implementing quantum controlled-NOT gates
• Controlled-Controlled-Phase Gates for Superconducting Qubits Mediated by a Shared Tunable Coupler
• Path-optimized nonadiabatic geometric quantum computation on superconducting qubits
• Single Shot i-Toffoli Gate in Dispersively Coupled Superconducting Qubits
• Experimental Quantum Randomness Processing
• Implementation of a generalized CNOT gate between fixed-frequency transmons
• Intrinsic leakage of the Josephson flux qubit and breakdown of the two-level approximation for strong driving
• Accelerating geometric quantum gates through non-cyclic evolution and shortcut to adiabaticity
• Single electron relativistic clock interferometer
• Resonant shortcuts for adiabatic rapid passage with only $z$-field control
• Entanglement and Quantum Error Correction with Superconducting Qubits
• Fast Flux-Activated Leakage Reduction for Superconducting Quantum Circuits
• Quantum state preparation by adiabatic evolution with customized gates
• 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
• Crosstalk-insensitive method for simultaneously coupling multiple pairs of resonators
• State leakage during fast decay and control of a superconducting transmon qubit
• Evaluation of Parameterized Quantum Circuits with Cross-Resonance Pulse-Driven Entanglers
• Quantum logic with weakly coupled qubits
• ICARUS-Q: Integrated Control and Readout Unit for Scalable Quantum Processors
• Interplay between disorder and topology in Thouless pumping on a superconducting quantum processor
• Realizing time crystals in discrete quantum few-body systems
• Pulse sequences for suppressing leakage in single-qubit gate operations
• Protocol for high fidelity readout in the photon blockade regime of circuit QED
• Coherent control of population transfer between vibrational states in an optical lattice via two-path quantum interference
• Robust Quantum Gates against Correlated Noise in Integrated Quantum Chips
• Controlled-NOT gate with weakly coupled qubits: Dependence of fidelity on the form of interaction
• Fault-Tolerant Quantum Computation for Singlet-Triplet Qubits with Leakage Errors
• Robust Quantum Control against Clock Noises in Multi-Qubit Systems
• Supervised learning for robust quantum control in composite-pulse systems
• Controllable high-fidelity quantum state transfer and entanglement generation in circuit QED
• All-microwave manipulation of superconducting qubits with a fixed-frequency transmon coupler
• Time-optimal rotation of a spin 1/2: application to the NV center spin in diamond
• PANSATZ: Pulse-based Ansatz for Variational Quantum Algorithms
• Rabi oscillations in a superconducting nanowire circuit
• Pulse sequence designed for robust C-phase gates in SiMOS and Si/SiGe double quantum dots
• Optimal generation of Fock states in a weakly nonlinear oscillator
• Reducing the error rate of a superconducting logical qubit using analog readout information
• Nonadiabatic geometric quantum gates that are insensitive to qubit-frequency drifts
• Characterizing non-Markovian Off-Resonant Errors in Quantum Gates
• Speed limits for two-qubit gates with weakly anharmonic qubits
• Measuring effective temperatures of qubits using correlations
• Optimizing quantum control pulses with complex constraints and few variables through Tensorflow
• Optimization of the resonator-induced phase gate for superconducting qubits
• Coupler-Assisted Leakage Reduction for Scalable Quantum Error Correction with Superconducting Qubits
• Improved Quantum Computing with the Higher-order Trotter Decomposition
• High-Fidelity Entangling Gates for Quantum-Dot Hybrid Qubits Based on Exchange Interactions
• Noncyclic Geometric Quantum Gates with Smooth Paths via Invariant-based Shortcuts
• High Fidelity Quantum Gates in the Presence of Dispersion
• Experimental error suppression in Cross-Resonance gates via multi-derivative pulse shaping
• Speeding up adiabatic passage with an optimal modified Roland-Cerf protocol
• Control and mitigation of microwave crosstalk effect with superconducting qubits
• Behavior of the maximum likelihood in quantum state tomography
• Approximate Dynamics Lead to More Optimal Control: Efficient Exact Derivatives
• Single-photon switch controlled by a qubit embedded in an engineered electromagnetic environment
• Qubit gates using hyperbolic secant pulses
• Crosstalk-Robust Quantum Control in Multimode Bosonic Systems
• A Silicon Surface Code Architecture Resilient Against Leakage Errors
• Quantum computer-aided design: digital quantum simulation of quantum processors
• Engineering adiabaticity at an avoided crossing with optimal control
• Quantum leakage detection using a model-independent dimension witness
• Model predictive control for robust quantum state preparation
• Compact 3D quantum memory
• Avoiding leakage and errors caused by unwanted transitions in Lambda systems
• High fidelity ac gate operations of the quantum dot hybrid qubit
• Qibolab: an open-source hybrid quantum operating system
• Protocol for generating an arbitrary quantum state of the magnetization in cavity magnonics
• Cavity-mediated entanglement of parametrically driven spin qubits via sidebands
• Realization of a binary-outcome projection measurement of a three-level superconducting quantum system
• Calibration of Drive Non-Linearity for Arbitrary-Angle Single-Qubit Gates Using Error Amplification
• Modeling low- and high-frequency noise in transmon qubits with resource-efficient measurement
• Majorana bound state engineering via efficient real-space parameter optimization
• Risk-sensitive Optimization for Robust Quantum Controls
• Entangling Schrödinger's cat states by bridging discrete- and continuous-variable encoding
• Combating fluctuations in relaxation times of fixed-frequency transmon qubits with microwave-dressed states
• Taming quantum systems: A tutorial for using shortcuts-to-adiabaticity, quantum optimal control, and reinforcement learning
• Quantum computing with superconducting circuits in the picosecond regime
• Speeding up qubit control with bipolar single-flux-quantum pulse sequences
• Characterizing a Four-Qubit Planar Lattice for Arbitrary Error Detection
• A Projection Operator-based Newton Method for the Trajectory Optimization of Closed Quantum Systems
• Multi-frequency control pulses for multi-level superconducting quantum circuits
• Decoherence predictions in a superconductive quantum device using the steepest-entropy-ascent quantum thermodynamics framework
• SimuQ: A Framework for Programming Quantum Hamiltonian Simulation with Analog Compilation
• Accelerated super-robust nonadiabatic holonomic quantum gates
• Closing a quantum feedback loop inside a cryostat: Autonomous state preparation and long-time memory of a superconducting qubit
• Controlling NMR spin systems for quantum computation
• A controllable two-qubit swapping gate using superconducting circuits
• Multi-mode superconducting circuits for realizing strongly coupled multi-qubit processor units
• Binary Control Pulse Optimization for Quantum Systems
• Benchmarking quantum gates and circuits
• Multi-frequency control and measurement of a spin-7/2 system encoded in a transmon qudit
• Reinforcement learning pulses for transmon qubit entangling gates
• Continuous quantum gate sets and pulse class meta-optimization
• Extended two-body Rydberg blockade interaction with off-resonant modulated driving
• Leakage Suppression for Holonomic Quantum Gates
• Experimentally Realizable C-NOT Gate in a Flux Qubit/Resonator System
• Robust and optimal control of open quantum systems
• Fast and differentiable simulation of driven quantum systems
• Microwave-based Arbitrary CPHASE Gates for Transmon Qubits
• Searching for an optimal control in the presence of saddles on the quantum mechanical observable landscape
• Exploiting dynamic quantum circuits in a quantum algorithm with superconducting qubits
• Conservation-law-based global bounds to quantum optimal control
• Nonadiabatic corrections to fast dispersive multiqubit gates involving Z control
• Fast and robust quantum computation with ionic Wigner crystals
• Direct digital synthesis of microwave waveforms for quantum computing
• Optimal control in large open quantum systems: the case of transmon readout and reset
• Anneal-path correction in flux qubits
• Non-perturbative analytical diagonalization of Hamiltonians with application to coupling suppression and enhancement in cQED
• Optimal control of hybrid qubits: implementing the quantum permutation algorithm
• Lecture Notes on Quantum Electrical Circuits
• Experimental demonstration of a high-fidelity virtual two-qubit gate
• Quantum Control via Stimulated Raman User-defined Passage
• Optical control protocols for high-fidelity spin rotations of single SiV${}^{-}$ and SnV${}^{-}$ centers in diamond
• Real-time simulation of flux qubits used for quantum annealing
• One Gate Scheme to Rule Them All: Introducing a Complex Yet Reduced Instruction Set for Quantum Computing
• Nonadiabatic geometric quantum computation with shortened path on superconducting circuits
• Baseband control of superconducting qubits with shared microwave drives
• Superadiabatic Control of Quantum Operations
• Thermometry Based on a Superconducting Qubit
• Designing globally optimal entangling gates using geometric space curves
• A cryogenic SRAM based arbitrary waveform generator in 14 nm for spin qubit control
• Reverse engineering of one-qubit filter functions with dynamical invariants
• Nonadiabatic geometric quantum gates with on-demand trajectories
• Universal Robust Geometric Quantum Control via Geometric Trajectory Correction
• Approximations in transmon simulation
• A universal quantum gate set for transmon qubits with strong ZZ interactions
• Quantum SWAP gate realized with CZ and iSWAP gates in a superconducting architecture
• High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Register
• Quasiparticle effects in magnetic-field-resilient 3D transmons
• Coherent Control with User-Defined Passage
• Characterizing Coherent Errors using Matrix-Element Amplification
• Efficient decoupling of a non-linear qubit mode from its environment
• Pymablock: an algorithm and a package for quasi-degenerate perturbation theory
• Error-Tolerant Geometric Quantum Control for Logical Qubits with Minimal Resource
• Complete physical characterization of QND measurements via tomography
• Evaluating the Resilience of Variational Quantum Algorithms to Leakage Noise
• Gate Operations for Superconducting Qubits and Non-Markovianity
• Mitigating Errors on Superconducting Quantum Processors through Fuzzy Clustering
• High-performance multiqubit system with double-transmon couplers: Toward scalable superconducting quantum computers
• Temporally correlated quantum noise in driven quantum systems
• Efficient characterization of qudit logical gates with gate set tomography using an error-free Virtual-Z-gate model
• Numerical Engineering of Robust Adiabatic Operations
• Practical implications of SFQ-based two-qubit gates
• Dynamically corrected gates for qubits with always-on Ising couplings: Error model and fault-tolerance with the toric code
• Parameterized Two-Qubit Gates for Enhanced Variational Quantum Eigensolver
• Active Leakage Cancellation in Single Qubit Gates
• Nonlinear Signal Distortion Corrections Through Quantum Sensing
• Charge-parity switching effects and optimisation of transmon-qubit design parameters
• Coherent transfer of singlet-triplet qubit states in an architecture of triple quantum dots
• Robust quantum control by smooth quasi-square pulses
• Remote Cross-resonance Gate between Superconducting Fixed-frequency Qubits
• Realizing Lattice Surgery on Two Distance-Three Repetition Codes with Superconducting Qubits
• Hybrid cat-transmon architecture for scalable, hardware-efficient quantum error correction
• Heralded entangled coherent states between spatially separated massive resonators
• Superfluid-Mott-insulator transition in superconducting circuits with weak anharmonicity
• Phonon-induced decoherence of a charge quadrupole qubit
• Parameterized Hamiltonian simulation using quantum optimal control
• Shortcuts to adiabaticity in superconducting circuits for fast multi-partite state generation
• Flux-pulse-assisted Readout of a Fluxonium Qubit
• Cryogenic photonic link using an extended-InGaAs photodiode and short pulse illumination towards high-fidelity drive of superconducting qubits
• Parametric multi-element coupling architecture for coherent and dissipative control of superconducting qubits
• Local control theory for superconducting qubits
• Universal pulses for superconducting qudit ladder gates
• The Role of Bases in Quantum Optimal Control
• Realizing a Continuous Set of Two-Qubit Gates Parameterized by an Idle Time
• Fast ZZ-Free Entangling Gates for Superconducting Qubits Assisted by a Driven Resonator
• Robust gates with spin-locked superconducting qubits
• Neural-network-designed three-qubit gates robust against charge noise and crosstalk in silicon
• Geometric correspondence of noisy quantum dynamics and universal robust quantum gates
• Robust and efficient algorithms for high-dimensional black-box quantum optimization
• Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe
• The superconducting circuit companion -- an introduction with worked examples
• Minimizing state preparation times in pulse-level variational molecular simulations
• Saturable Purcell filter for circuit quantum electrodynamics
• Quantum geometric protocols for fast high-fidelity adiabatic state transfer
• Leakage suppression by ultrafast pulse shaping
• Realization of Constant-Depth Fan-Out with Real-Time Feedforward on a Superconducting Quantum Processor
• Quantum Control of d-Dimensional Quantum Systems with Application to Alkali Atomic Spins
• Dual-Capability Machine Learning Models for Quantum Hamiltonian Parameter Estimation and Dynamics Prediction
• Directional emission of a readout resonator for qubit measurement
• Minimal Time Robust Control for Two Superconducting Qubits
• Suppressing spurious transitions using spectrally balanced pulse
• Improved autonomous error correction using variable dissipation in small logical qubit architectures
• Comparing planar quantum computing platforms at the quantum speed limit
• Optimization of Junction and Bias Parameters in readout of Phase Qubit
• Fast quantum gate design with deep reinforcement learning using real-time feedback on readout signals
• Controlling nonergodicity in quantum many-body systems by reinforcement learning
• Deterministic generation of frequency-bin-encoded microwave photons
• Single-Qubit Gates Beyond the Rotating-Wave Approximation for Strongly Anharmonic Low-Frequency Qubits
• Supercomputer simulations of transmon quantum computers
• Generally noise-resilient quantum gates for trapped-ions
• Effect of Ohmic environment on optimally controlled flux-biased phase qubit
• Qubit dynamics driven by smooth pulses of finite duration
• On-demand shaped photon emission based on a parametrically modulated qubit
• Magic State Injection with Erasure Qubits
• Fast microwave-driven two-qubit gates between fluxonium qubits with a transmon coupler
• Above 99.9% Fidelity Single-Qubit Gates, Two-Qubit Gates, and Readout in a Single Superconducting Quantum Device
• Quantum Property Preservation
• Switching Time Optimization for Binary Quantum Optimal Control
• An introduction into optimal control for quantum technologies
• Critical slowing down of multi-atom entanglement by Rydberg blockade
• A system design approach toward integrated cryogenic quantum control systems
• Quantum Optimal Control Theory for the Shaping of Flying Qubits
• Leakage in restless quantum gate calibration
• On the fragility of gate-error metrics in simulation models of flux-tunable transmon quantum computers
• Observation of Emergent ${\mathbb{Z}}_2$ Gauge Invariance in a Superconducting Circuit
• Quantum Shortcut to Adiabaticity for State Preparation in a Finite-Sized Jaynes-Cummings Lattice
• Quantum Software Ecosystem Design
• Dynamics of observables and exactly solvable quantum problems: Using time-dependent density functional theory to control quantum systems
• Characteristics, Implementation and Applications of Special Perfect Entangler Circuits
• Error metric for non-trace-preserving quantum operations
• A practical guide for building superconducting quantum devices
• Parameter optimization for the unimon qubit
• Fast spin-valley-based quantum gates in Si with micromagnets
• Selective Excitation of Superconducting Qubits with a Shared Control Line through Pulse Shaping
• Spectrum analysis with parametrically modulated transmon qubits
• Controlled-NOT logic gate for phase qubits based on conditional spectroscopy
• Practical quantum error correction with the XZZX code and Kerr-cat qubits
• Gate-Based Initialization and Fidelity in Correlated Open Quantum Systems
• Decoherence-free propagation and ramification of a solitary pulse
• Mitigating Measurement Crosstalk via Pulse Shaping
• Simulating a Topological Transition in a Superconducting Phase Qubit by Fast Adiabatic Trajectories
• Ultrastrong Coupling of a Qubit with a Nonlinear Optical Resonator
• Accurate Leakage Speculation for Quantum Error Correction
• Pareto-optimality of pulses for robust population transfer in a ladder-type qutrit
• Accurate Qubit Control with Single Flux Quantum Pulses
• Violation of no-signaling on a public quantum computer
• Sparse Non-Markovian Noise Modeling of Transmon-Based Multi-Qubit Operations
• Binary Quantum Control Optimization with Uncertain Hamiltonians
• Microwave-activated high-fidelity three-qubit gate scheme for fixed-frequency superconducting qubits
• Refuting a Proposed Axiom for Defining the Exact Rotating Wave Approximation
• Pulse-controlled quantum gate sequences on a strongly coupled qubit chain
• Characterization of multi-level dynamics and decoherence in a high-anharmonicity capacitively shunted flux circuit
• Achieving fast and robust perfect entangling gates via reinforcement learning
• Generation of time-frequency entangled photon pairs propagating in separate waveguides in circuit QED setup
• Time-optimal single-scalar control on a qubit of unitary dynamics
• Protected phase gate for the $0$-$\pi$ qubit using its internal modes
• Quantum Optimal Control via Magnus Expansion and Non-Commutative Polynomial Optimization
• Engineering Precise and Robust Effective Hamiltonians
• Robustness Enhancement of Universal Noncyclic Geometric Gates via Evolution Optimization
• Proposal for erasure conversion in integer fluxonium qubits
• Quasiparticle-induced decoherence of a driven superconducting qubit
• Purity benchmarking study of error coherence in a single Xmon qubit
• Circuit QED: Implementation of the three-qubit refined Deutsch-Jozsa quantum algorithm
• Robust multi-mode superconducting circuit optimized for quantum information processing
• Quantum Process Tomography with Digital Twins of Error Matrices
• Effective non-local parity-dependent couplings in qubit chains
• Quantum Computation
• Simulated Randomized Benchmarking of a Dynamically Corrected Cross-Resonance Gate
• Incoherent Approximation of Leakage in Quantum Error Correction
• Robust shaped pulses for arrays of superconducting or semiconductor spin qubits with fixed Ising coupling
• Iterative Linear Quadratic Regulator for Quantum Optimal Control
• Passive leakage removal unit based on a disordered transmon array
• Geometric and holonomic quantum computation
• Globally optimal control of quantum dynamics
• Time-frequency-correlated Native CCZ Gate in Superconducting Circuits
• A Time Optimization Framework for the Implementation of Robust and Low-latency Quantum Circuits
• Device-independent dimension leakage null test on qubits at low operational cost
• Fast magnetic field manipulations and nonadiabatic geometric phases of nitrogen-vacancy center spin in diamond
• Approximate quantum gates compiling with self-navigation algorithm
• Designing gate operations for single ion quantum computing in rare-earth-ion-doped crystals
• Measurement-and Feedback-Driven Non-Equilibrium Phase Transitions on a Quantum Processor
• Measuring and correcting nanosecond pulse distortions in quantum-dot spin qubits