Rapid and Unconditional Parametric Reset Protocol for Tunable Superconducting Qubits

Abstract

Qubit initialization is a critical task in quantum computation and communication. Extensive efforts have been made to achieve this with high speed, efficiency and scalability. However, previous approaches have either been measurement-based and required fast feedback, suffered from crosstalk or required sophisticated calibration. Here, we report a fast and high-fidelity reset scheme, avoiding the issues above without any additional chip architecture. By modulating the flux through a transmon qubit, we realize a swap between the qubit and its readout resonator that suppresses the excited state population to 0.08% $\pm$ 0.08% within 34 ns (284 ns if photon depletion of the resonator is required). Furthermore, our approach (i) can achieve effective second excited state depletion, (ii) has negligible effects on neighbouring qubits, and (iii) offers a way to entangle the qubit with an itinerant single photon, useful in quantum communication applications.

arXiv comment38 pages, 15 figures

References in corpus (57)

• Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
• Charge insensitive qubit design derived from the Cooper pair box
• Surface codes: Towards practical large-scale quantum computation
• Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
• The Physical Implementation of Quantum Computation
• Circuit Quantum Electrodynamics
• A Quantum Engineer's Guide to Superconducting Qubits
• Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing
• Coherent Josephson qubit suitable for scalable quantum integrated circuits
• Realization of Three-Qubit Quantum Error Correction with Superconducting Circuits
• Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
• New material platform for superconducting transmon qubits with coherence times exceeding 0.3 milliseconds
• Fast Scalable State Measurement with Superconducting Qubits
• A Dissipatively Stabilized Mott Insulator of Photons
• Deterministic Quantum State Transfer and Generation of Remote Entanglement using Microwave Photons
• A universal gate for fixed-frequency qubits via a tunable bus
• Demonstration of Universal Parametric Entangling Gates on a Multi-Qubit Lattice
• Observation of measurement-induced entanglement and quantum trajectories of remote superconducting qubits
• Fast Reset and Suppressing Spontaneous Emission of a Superconducting Qubit
• Rapid high-fidelity multiplexed readout of superconducting qubits
• Quantum harmonic oscillator state synthesis by reservoir engineering
• Optimal quantum control using randomized benchmarking
• Demonstrating a Driven Reset Protocol of a Superconducting Qubit
• Fast and Unconditional All-Microwave Reset of a Superconducting Qubit
• Coherence and Decay of Higher Energy Levels of a Superconducting Transmon Qubit
• Measurement-induced state transitions in a superconducting qubit: Beyond the rotating wave approximation
• Deterministic multi-qubit entanglement in a quantum network
• Parametrically Activated Entangling Gates Using Transmon Qubits
• Feedback control of a solid-state qubit using high-fidelity projective measurement
• Heralded state preparation in a superconducting qubit
• Thermal and Residual Excited-State Population in a 3D Transmon Qubit
• Initialization by measurement of a two-qubit superconducting circuit
• Microwave-controlled generation of shaped single photons in circuit quantum electrodynamics
• Perfect quantum state transfer in a superconducting qubit chain with parametrically tunable couplings
• First-order sideband transitions with flux-driven asymmetric transmon qubits
• Motional Averaging in a Superconducting Qubit
• Universal stabilization of a parametrically coupled qubit
• Using a qubit to measure photon number statistics of a driven, thermal oscillator
• Removing leakage-induced correlated errors in superconducting quantum error correction
• Persistent control of a superconducting qubit by stroboscopic measurement feedback
• Measurement-induced qubit state mixing in circuit QED from up-converted dephasing noise
• First-order sidebands in circuit QED using qubit frequency modulation
• Microwave-Induced Amplitude and Phase Tunable Qubit-Resonator Coupling in Circuit Quantum Electrodynamics
• Rapid Driven Reset of a Qubit Readout Resonator
• Analytical modeling of parametrically-modulated transmon qubits
• Time-domain characterization and correction of on-chip distortion of control pulses in a quantum processor
• Active resonator reset in the nonlinear dispersive regime of circuit QED
• Demonstration of a Parametrically-Activated Entangling Gate Protected from Flux Noise
• Pulsed reset protocol for fixed-frequency superconducting qubits
• Low-Latency Digital Signal Processing for Feedback and Feedforward in Quantum Computing and Communication
• Protecting quantum entanglement from leakage and qubit errors via repetitive parity measurements
• Realization of Superadiabatic Two-qubit Gates Using Parametric Modulation in Superconducting Circuits
• Quantum communication with time-bin encoded microwave photons
• Optimization of infrared and magnetic shielding of superconducting TiN and Al coplanar microwave resonators
• Qubit Parity Measurement by Parametric Driving in Circuit QED
• High speed flux sampling for tunable superconducting qubits with an embedded cryogenic transducer
• Exploiting dynamic quantum circuits in a quantum algorithm with superconducting qubits

Cited by in corpus (14)

• Overcoming leakage in scalable quantum error correction
• Measurement-Induced State Transitions in a Superconducting Qubit: Within the Rotating Wave Approximation
• Thermally driven quantum refrigerator autonomously resets superconducting qubit
• Exceptional entanglement phenomena: non-Hermiticity meeting non-classicality
• Coupler-Assisted Controlled-Phase Gate with Enhanced Adiabaticity
• Shortcuts to Adiabaticity for Open Systems in Circuit Quantum Electrodynamics
• Universal KPZ scaling in noisy hybrid quantum circuits
• Recent Developments in Quantum-Circuit Refrigeration
• A quantum collisional classifier driven by information reservoir
• Exceptional-point-assisted entanglement, squeezing, and reset in a chain of three superconducting resonators
• Shortcuts to Adiabaticity for Fast Qubit Readout in Circuit Quantum Electrodynamics
• Exploiting Different Levels of Parallelism in the Quantum Control Microarchitecture for Superconducting Qubits
• Spontaneous decay of artificial atoms in a three-qubit system
• Ergotropy Activation and Coherence in Dissipatively Charged Quantum Batteries