Microwave Quantum Illumination with Optical Memory and Single-Mode Phase-Conjugate Receiver

• URL: http://arxiv.org/abs/2405.14118v1
• Date: Thu, 23 May 2024 02:44:19 GMT
• Title: Microwave Quantum Illumination with Optical Memory and Single-Mode Phase-Conjugate Receiver
• Authors: Sangwoo Jeon, Jihwan Kim, Duk Y. Kim, Zaeill Kim, Taek Jeong, Su-Yong Lee,
• Abstract summary: Microwave quantum illumination with entangled pairs of microwave signal and optical idler modes, can achieve the sub-optimal performance. We first propose a testbed of microwave quantum illumination with an optical memory which is simulated with a delay line in the idler mode. We propose a single-mode phase conjugate receiver that consists of a low-reflectivity beam splitter, an electro-optomechanical phase conjugator, and a photon number resolving detector.
• Score: 5.7993016886528785
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Microwave quantum illumination with entangled pairs of microwave signal and optical idler modes, can achieve the sub-optimal performance with joint measurement of the signal and idler modes. Here, we first propose a testbed of microwave quantum illumination with an optical memory which is simulated with a delay line in the idler mode. It provides how much an input two-mode squeezing is necessary to compensate the loss of the optical memory, while maintaining quantum advantage over coherent state. When the memory is lossy, the input two-mode squeezing has to be higher through high cooperativity in the optical mode. Under the testbed, we propose a single-mode phase conjugate receiver that consists of a low-reflectivity beam splitter, an electro-optomechanical phase conjugator, and a photon number resolving detector. The performance of the newly proposed receiver approaches the maximum quantum advantage for local measurement. Furthermore, the quantum advantage is obtained even with an on-off detection while being robust against the loss of the memory.

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