Non-demolition fluorescence readout and high-fidelity unconditional reset of a fluxonium qubit via dissipation engineering
arXiv:2504.15901 · doi:10.1103/gcgj-srgy
Abstract
Non-demolition readout and high-fidelity unconditional reset of qubits are key requirements for practical quantum computation. For superconducting qubits, readout and reset are typically realized using resonators based on dispersive approximation. However, violations of the approximation often lead to detrimental effects on the qubit. In this work, we demonstrate non-demolition fluorescence readout and high-fidelity unconditional reset of a fluxonium qubit via dissipation engineering without employing a resonator. We design and implement a planar filter to protect the qubit from energy relaxation while enhancing the relaxation of the readout transition. By appropriately selecting the readout transition, we achieve fluorescence readout with enhanced quantum non-demolitionness. We also realize fast, high-fidelity and all-microwave unconditional reset of the fluxonium qubit. These results highlight the potential of superconducting-quantum computing architectures without relying on dispersive interaction between qubits and resonators.
11 pages, 8 figures
References in corpus (35)
- Supplementary information for "Quantum supremacy using a programmable superconducting processor"
- Charge insensitive qubit design derived from the Cooper pair box
- Circuit Quantum Electrodynamics
- Quantum error correction below the surface code threshold
- The Future of Quantum Computing with Superconducting Qubits
- Realization of high-fidelity CZ and ZZ-free iSWAP gates with a tunable coupler
- Quasiparticle relaxation of superconducting qubits in the presence of flux
- Fluxonium: an alternative qubit platform for high-fidelity operations
- Non-Poissonian Quantum Jumps of a Fluxonium Qubit due to Quasiparticle Excitations
- 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
- High fidelity two-qubit gates on fluxoniums using a tunable coupler
- Moving beyond the transmon: Noise-protected superconducting quantum circuits
- Dynamics of Transmon Ionization
- Improving the Quality Factor of Microwave Compact Resonators by Optimizing their Geometrical Parameters
- Scalable High-Performance Fluxonium Quantum Processor
- Measurement-Induced State Transitions in a Superconducting Qubit: Within the Rotating Wave Approximation
- Fast logic with slow qubits: microwave-activated controlled-Z gate on low-frequency fluxoniums
- Measurement-Induced Transmon Ionization
- Coexistence of nonequilibrium density and equilibrium energy distribution of quasiparticles in a superconducting qubit
- Enhancing Dispersive Readout of Superconducting Qubits Through Dynamic Control of the Dispersive Shift: Experiment and Theory
- Resisting high-energy impact events through gap engineering in superconducting qubit arrays
- Quantum non-demolition dispersive readout of a superconducting artificial atom using large photon numbers
- Realization of High-Fidelity CZ Gate based on a Double-Transmon Coupler
- Photon-noise-tolerant dispersive readout of a superconducting qubit using a nonlinear Purcell filter
- Efficient initialization of fluxonium qubits based on auxiliary energy levels
- High coherence fluxonium manufactured with a wafer-scale uniformity process
- Compact superconducting microwave resonators based on Al-AlOx-Al capacitor
- Broadband Bandpass Purcell Filter for Circuit Quantum Electrodynamics
- Measurement-induced state transitions in dispersive qubit readout schemes
- Enhanced Qubit Readout via Reinforcement Learning
- Characterization of Broadband Purcell Filters with Compact Footprint for Fast Multiplexed Superconducting Qubit Readout
- Flux-pulse-assisted Readout of a Fluxonium Qubit
- Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums
- Control and readout of a transmon using a compact superconducting resonator