2024/07/18 by C. H. Chen, Kai Tang, Chen, Changling +19 · 1 citation
Computer Science · Engineering · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Control and Stability of Dynamical Systems #FOS: Physical sciences #Quantum Computing Algorithms and Architecture #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.2407.13321
openalex publication_date 2024/07/18 · openalex created_date 2025/01/04 · openalex updated_date 2026/07/28
Generation and preservation of quantum entanglement are among the primary\ntasks in quantum information processing. State stabilization via quantum bath\nengineering offers a resource-efficient approach to achieve this objective.\nHowever, current methods for engineering dissipative channels to stabilize\ntarget entangled states often require specialized hardware designs,\ncomplicating experimental realization and hindering their compatibility with\nscalable quantum computation architectures. In this work, we propose and\nexperimentally demonstrate a stabilization protocol readily implementable in\nthe mainstream integrated superconducting quantum circuits. The approach\nutilizes a Raman process involving a resonant (or nearly resonant)\nsuperconducting qubit array and their dedicated readout resonators to\neffectively emerge nonlocal dissipative channels. Leveraging individual\ncontrollability of the qubits and resonators, the protocol stabilizes two-qubit\nBell states with a fidelity of 90.7 %, marking the highest reported value in\nsolid-state platforms to date. Furthermore, by extending this strategy to\ninclude three qubits, an entangled W state is achieved with a fidelity of\n86.2 %, which has not been experimentally investigated before. Notably, the\nprotocol is of practical interest since it only utilizes existing hardware\ncommon to standard operations in the underlying superconducting circuits,\nthereby facilitating the exploration of many-body quantum entanglement with\ndissipative resources.\n