Quantum illumination with asymmetrically squeezed two-mode light
Abstract
We propose Gaussian quantum illumination(QI) protocol exploiting asymmetrically squeezed two-mode(ASTM) state that is generated by applying single-mode squeezing operations on each mode of an initial two-mode squeezed vacuum(TMSV) state, in order to overcome the limited brightness of a TMSV state. We show that the performance of the optimal receiver is enhanced by local squeezing operation on a signal mode whereas the performance of a realistic receiver can be enhanced by local squeezing operations on both input modes. Under a fixed mean photon number of the signal mode, the ASTM state can be close to the TMSV state in the performance of QI while there is a threshold of beating classical illumination in the mean photon number of the initial TMSV state. We also verify that quantum discord cannot be a resource of quantum advantage in the Gaussian QI using the ASTM state, which is a counterexample of a previous claim.
Cite
@article{arxiv.2103.17006,
title = {Quantum illumination with asymmetrically squeezed two-mode light},
author = {Yonggi Jo and Taek Jeong and Junghyun Kim and Duk Y. Kim and Yong Sup Ihn and Zaeill Kim and Su-Yong Lee},
journal= {arXiv preprint arXiv:2103.17006},
year = {2021}
}
Comments
12 pages, 8 figures; Comments are welcome