Coherent Phonon-Photon Coupling in Hybrid Superconducting-Optomechanical Networks for Long-Lived Quantum Memories
Kazakhstan Kazakhstan Kazakhstan 
Abstract
Hybrid quantum architectures require memories that unite rapid superconducting processing, durable mechanical storage, and low-loss optical communication, yet interfacial dissipation and thermal noise continue to constrain coherent state preservation. This study aimed to determine whether coherent phonon–photon coupling in superconducting–optomechanical networks could support long-lived quantum memories and to identify the physical conditions governing reliable operation. A theoretical-computational design combined an effective three-mode Hamiltonian with Lindblad master equations, quantum Langevin analysis, covariance-matrix simulations, and parameter sweeps across 12,000 stable configurations. Memory performance was assessed through efficiency, process fidelity, added noise, coherence lifetime, detuning tolerance, and coupling asymmetry. The simulations yielded mean efficiency of 78.24%, mean process fidelity of 0.86, and mean coherence lifetime of 8.63 ms. Adiabatic dark-mode transfer achieved higher median fidelity than resonant swapping (0.91 versus 0.83) and remained more resistant to thermal loading and frequency mismatch. An optimized configuration preserved 0.93 fidelity after 10 ms and attained 92.4% optical retrieval efficiency with 0.06 added-noise quanta. Coherent phonon–photon coupling can therefore reliably provide millisecond-scale quantum storage when high mechanical quality, low temperature, balanced cooperativity, and properly timed control pulses are jointly maintained. Experimental validation remains essential before scalability can be established under realistic device imperfections and non-Markovian noise conditions.
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Authors
Copyright (c) 2026 Gulnaz Kudaibergenova, Ilyas Nurmakhanov, Zhanar Tuleshova
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