Experimental error suppression in Cross-Resonance gates via multi-derivative pulse shaping
arXiv:2303.01427 · doi:10.1038/s41534-024-00863-4
Abstract
While quantum circuits are reaching impressive widths in the hundreds of qubits, their depths have not been able to keep pace. In particular, cloud computing gates on multi-qubit, fixed-frequency superconducting chips continue to hover around the 1% error range, contrasting with the progress seen on carefully designed two-qubit chips, where error rates have been pushed towards 0.1%. Despite the strong impetus and a plethora of research, experimental demonstration of error suppression on these multi-qubit devices remains challenging, primarily due to the wide distribution of qubit parameters and the demanding calibration process required for advanced control methods. Here, we achieve this goal, using a simple control method based on multi-derivative, multi-constraint pulse shaping, which acts simultaneously against multiple error sources. Our approach establishes a two to fourfold improvement on the default calibration scheme, demonstrated on four qubits on the IBM Quantum Platform with limited and intermittent access, enabling these large-scale fixed-frequency systems to fully take advantage of their superior coherence times. The achieved CNOT fidelities of 99.7(1)% on those publically available qubits come from both coherent control error suppression and accelerated gate time.
Published version
References in corpus (50)
- Suppressing quantum errors by scaling a surface code logical qubit
- Shortcuts to adiabaticity: concepts, methods, and applications
- Simple pulses for elimination of leakage in weakly nonlinear qubits
- Shortcut to adiabatic passage in two and three level atoms
- Procedure for systematically tuning up crosstalk in the cross resonance gate
- Transmon qubit with relaxation time exceeding 0.5 milliseconds
- Realization of an Error-Correcting Surface Code with Superconducting Qubits
- Fidelity of quantum operations
- Analytic control methods for high fidelity unitary operations in a weakly nonlinear oscillator
- Measuring and Suppressing Quantum State Leakage in a Superconducting Qubit
- Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit
- Experimental demonstration of fault-tolerant state preparation with superconducting qubits
- Laser-annealing Josephson junctions for yielding scaled-up superconducting quantum processors
- Effective Hamiltonian models of the cross-resonance gate
- Demonstration of weight-four parity measurements in the surface code architecture
- Microwave-induced coupling of superconducting qubits
- Demonstration of a High-Fidelity CNOT for Fixed-Frequency Transmons with Engineered ZZ Suppression
- Qiskit Pulse: Programming Quantum Computers Through the Cloud with Pulses
- Qutrit randomized benchmarking
- High-Fidelity Qutrit Entangling Gates for Superconducting Circuits
- Reducing unitary and spectator errors in cross resonance with optimized rotary echoes
- First-principles analysis of cross-resonance gate operation
- Removing leakage-induced correlated errors in superconducting quantum error correction
- Quantum crosstalk analysis for simultaneous gate operations on superconducting qubits
- Selective darkening of degenerate transitions demonstrated with two superconducting quantum bits
- Improving frequency selection of driven pulses using derivative-based transition suppression
- Operation and intrinsic error budget of a two-qubit cross-resonance gate
- High-fidelity three-qubit iToffoli gate for fixed-frequency superconducting qubits
- Overcoming leakage in scalable quantum error correction
- Global optimization of quantum dynamics with AlphaZero deep exploration
- Quantum crosstalk cancellation for fast entangling gates and improved multi-qubit performance
- Hardware-Efficient Microwave-Activated Tunable Coupling Between Superconducting Qubits
- Charting the circuit QED design landscape using optimal control theory
- Understanding the effects of leakage in superconducting quantum error detection circuits
- Fast logic with slow qubits: microwave-activated controlled-Z gate on low-frequency fluxoniums
- Protecting quantum entanglement from leakage and qubit errors via repetitive parity measurements
- Counteracting systems of diabaticities using DRAG controls: The status after 10 years
- Leakage detection for a transmon-based surface code
- Optimized cross-resonance gate for coupled transmon systems
- Gate-error analysis in simulations of quantum computers with transmon qubits
- All-microwave leakage reduction units for quantum error correction with superconducting transmon qubits
- Mitigation of frequency collisions in superconducting quantum processors
- Perturbation impact of spectators on a cross-resonance gate in a tunable coupling superconducting circuit
- ZZ freedom in two qubit gates
- Tunable coupling between three qubits as a building block for a superconducting quantum computer
- Optimal generation of Fock states in a weakly nonlinear oscillator
- CNOT gates for fluxonium qubits via selective darkening of transitions
- Characterizing non-Markovian Off-Resonant Errors in Quantum Gates
- An error-protected cross-resonance switch in weakly-tuneable architectures
- Non-perturbative analytical diagonalization of Hamiltonians with application to coupling suppression and enhancement in cQED
Cited by in corpus (9)
- Reducing leakage of single-qubit gates for superconducting quantum processors using analytical control pulse envelopes
- Taming quantum systems: A tutorial for using shortcuts-to-adiabaticity, quantum optimal control, and reinforcement learning
- Correction Formulas for the Mølmer-Sørensen Gate Under Strong Driving
- Universal pulses for superconducting qudit ladder gates
- Single-Qubit Gates Beyond the Rotating-Wave Approximation for Strongly Anharmonic Low-Frequency Qubits
- Suppressing spurious transitions using spectrally balanced pulse
- Correcting noisy quantum gates with shortcuts to adiabaticity
- Higher-order protection of quantum gates: Hamiltonian engineering coordinated with dynamical decoupling
- Scalable Low-overhead Superconducting Non-local Coupler with Exponentially Enhanced Connectivity