1. Microwave Quantum Illumination with Optical Memory and Single-Mode Phase-Conjugate Receiver
- Author
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Jeon, Sangwoo, Kim, Jihwan, Kim, Duk Y., Kim, Zaeill, Jeong, Taek, and Lee, Su-Yong
- Subjects
Quantum Physics - 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., Comment: 8 pages, 7 figures
- Published
- 2024