Photonic Quantum Receiver Attaining the Helstrom Bound
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866914996819066880 |
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| author | Warke, Aakash Nötzel, Janis Takase, Kan Asavanant, Warit Nagayoshi, Hironari Fukui, Kosuke Takeda, Shuntaro Furusawa, Akira van Loock, Peter |
| author_facet | Warke, Aakash Nötzel, Janis Takase, Kan Asavanant, Warit Nagayoshi, Hironari Fukui, Kosuke Takeda, Shuntaro Furusawa, Akira van Loock, Peter |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_21800 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Photonic Quantum Receiver Attaining the Helstrom Bound Warke, Aakash Nötzel, Janis Takase, Kan Asavanant, Warit Nagayoshi, Hironari Fukui, Kosuke Takeda, Shuntaro Furusawa, Akira van Loock, Peter Quantum Physics 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. |
| title | Photonic Quantum Receiver Attaining the Helstrom Bound |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2410.21800 |