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Trapped Ion Quantum Computing

Photonic Quantum Receiver Attaining the Helstrom Bound

arXiv
Authors: Aakash Warke, Janis Nötzel, Kan Takase, Warit Asavanant, Hironari Nagayoshi, Kosuke Fukui, Shuntaro Takeda, Akira Furusawa, Peter van Loock

Year

2024

Paper ID

37541

Status

Preprint

Abstract Read

~2 min

Abstract Words

106

Citations

N/A

Abstract

We propose an efficient decomposition scheme for a quantum receiver that attains the Helstrom bound in the low-photon regime for discriminating binary coherent states. Our method, which avoids feedback as used in Dolinar's case, breaks down nonlinear operations into basic gates used in continuous-variable quantum computation. We account for realistic conditions by examining the impact of photon loss and imperfect photon detection, including the presence of dark counts, while presenting squeezing as a technique to mitigate these noise sources and maintain the advantage over SQL. Our scheme motivates testing quantum advantages with cubic-phase gates and designing photonic quantum computers to optimize symbol-by-symbol measurements in optical communication.

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  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
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  • We propose an efficient decomposition scheme for a quantum receiver that attains the Helstrom bound in the low-photon regime for discriminating binary coherent states.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2410.21800 [2] arXiv https://arxiv.org/abs/2410.21800 [3] Publisher https://arxiv.org/abs/2410.21800

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