Trade off-Free Entanglement Stabilization in a Superconducting Qutrit-Qubit System

Abstract

Quantum reservoir engineering is a powerful framework for autonomous quantum state preparation and error correction. However, traditional approaches to reservoir engineering are hindered by unavoidable coherent leakage out of the target state, which imposes an inherent trade off between achievable steady-state state fidelity and stabilization rate. In this work we demonstrate a protocol that achieves trade off-free Bell state stabilization in a qutrit-qubit system realized on a circuit-QED platform. We accomplish this by creating a purely dissipative channel for population transfer into the target state, mediated by strong parametric interactions coupling the second-excited state of a superconducting transmon and the engineered bath resonator. Our scheme achieves a state preparation fidelity of 84% with a stabilization time constant of 339 ns, leading to the lowest error-time product reported in solid-state quantum information platforms to date.

19 pages, 14 figures

References in corpus (15)

• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• Surface codes: Towards practical large-scale quantum computation
• QuTiP 2: A Python framework for the dynamics of open quantum systems
• Quantum information processing with circuit quantum electrodynamics
• Confining the state of light to a quantum manifold by engineered two-photon loss
• Quantum Optics of Chiral Spin Networks
• Fast Reset and Suppressing Spontaneous Emission of a Superconducting Qubit
• Quantum harmonic oscillator state synthesis by reservoir engineering
• Coherence and Decay of Higher Energy Levels of a Superconducting Transmon Qubit
• Feedback control of a solid-state qubit using high-fidelity projective measurement
• Universal stabilization of a parametrically coupled qubit
• Coherent-State Storage and Retrieval Between Superconducting Cavities Using Parametric Frequency Conversion
• Dissipative preparation of W states in trapped ion systems
• Resource-efficient dissipative entanglement of two trapped-ion qubits
• Stabilizing two-qubit entanglement by mimicking a squeezed environment

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• Strong parametric dispersive shifts in a statically decoupled multi-qubit cavity QED system
• Exact Results for a Boundary-Driven Double Spin Chain and Resource-Efficient Remote Entanglement Stabilization
• Dilute measurement-induced cooling into many-body ground states
• Generalized Quantum Fluctuation Theorem for Energy Exchange
• Stabilizing two-qubit entanglement with dynamically decoupled active feedback
• Observation of multiple steady states with engineered dissipation
• Accelerating Dissipative State Preparation with Adaptive Open Quantum Dynamics
• Universal Time-Entanglement Trade-off in Open Quantum Systems
• Loss resilience of driven-dissipative remote entanglement in chiral waveguide quantum electrodynamics
• Adiabatic quantum trajectories in engineered reservoirs
• Experimental Extraction of Coherent Ergotropy and Its Energetic Cost in a Superconducting Qubit
• Dephasing-assisted diffusive dynamics in superconducting quantum circuits
• Parametric multi-element coupling architecture for coherent and dissipative control of superconducting qubits
• Scaling W state circuits in the qudit Clifford hierarchy
• Autonomous Stabilization of Floquet States Using Static Dissipation
• Instability of steady-state mixed-state symmetry-protected topological order to strong-to-weak spontaneous symmetry breaking
• How pure can we go with adiabatic state manipulation?
• Enhancing Nonreciprocity through Squeezing-Induced Symmetry Breaking
• Autonomous stabilization of remote entanglement in a cascaded quantum network
• Transversal AND in Quantum Codes