Force Sensing in a Recoverable Bosonic Quantum Memory
Abstract
In continuous-variable quantum information, sensing and quantum error correction in the same mode face an intrinsic trade-off: sensors must accumulate weak external displacements, whereas bosonic codes typically suppress such shifts as errors. Here, we establish compatibility by constructing finite-energy bosonic codes that enable a single oscillator to sense an external force while actively protecting an unknown logical qubit. By encoding logical amplitudes across discrete wave-packet sites and capturing the force signal in a shared internal coordinate, we achieve an endpoint probe readout that is independent of the logical state under continuous photon loss γ. Crucially, binomial site recovery cancels packet-dependent probe distortions alongside logical errors: for a (2r+2)-packet code, memory infidelity is suppressed to O(γr+1) while residual memory-probe correlations scale as O(γr+2). Finally, superconducting quantum circuit benchmarks under competing photon-number dephasing and Kerr nonlinearity identify preferred encoding regimes for hardware implementation.
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BibTeX
@misc{bai2026force,
title = {{Force Sensing in a Recoverable Bosonic Quantum Memory}},
author = {Tairong Bai and Wen Zheng and Haoyang Cai and Xianke Li and Yangyang Ge and Kun Zhou and Xiangmin Yu and Yu Zhang and Shaoxiong Li and Xinsheng Tan and Jie Zhao and Yang Yu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.39208},
eprint = {2610.39208},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.39208},
}
RIS
TY - UNPB
TI - Force Sensing in a Recoverable Bosonic Quantum Memory
AU - Tairong Bai
AU - Wen Zheng
AU - Haoyang Cai
AU - Xianke Li
AU - Yangyang Ge
AU - Kun Zhou
AU - Xiangmin Yu
AU - Yu Zhang
AU - Shaoxiong Li
AU - Xinsheng Tan
AU - Jie Zhao
AU - Yang Yu
PY - 2026
DA - 2026/10/29
PB - arXiv
DO - 10.48550/arxiv.2610.39208
UR - https://arxiv.org/abs/2610.39208
AB - In continuous-variable quantum information, sensing and quantum error correction in the same mode face an intrinsic trade-off: sensors must accumulate weak external displacements, whereas bosonic codes typically suppress such shifts as errors. Here, we establish compatibility by constructing finite-energy bosonic codes that enable a single oscillator to sense an external force while actively protecting an unknown logical qubit. By encoding logical amplitudes across discrete wave-packet sites and capturing the force signal in a shared internal coordinate, we achieve an endpoint probe readout that is independent of the logical state under continuous photon loss γ. Crucially, binomial site recovery cancels packet-dependent probe distortions alongside logical errors: for a (2r+2)-packet code, memory infidelity is suppressed to O(γ^r+1) while residual memory-probe correlations scale as O(γ^r+2). Finally, superconducting quantum circuit benchmarks under competing photon-number dephasing and Kerr nonlinearity identify preferred encoding regimes for hardware implementation.
ER -