| TITLE |
Optimal quantum phase estimation with generalized multi-component Schrodinger cat states |
| KIAS AUTHORS |
Kim, Jaewan,Lee, Seung-Woo |
| JOURNAL |
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 2020 |
| ARCHIVE |
arXiv:2003.06302 [quant-ph]
|
| ABSTRACT |
In this paper, we are interested in detecting the presence of a nearby phase-sensitive object, where traveling light works out under a low-photon loss rate. Here we investigate the optimal quantum phase estimation with generalized multi-component Schrodinger cat states. In addition, we show the optimal conditions of the generalized multi-component cat states for the phase estimation in a lossless scenario. We then demonstrate that the generalized multi-component cat states can beat the performances of the NOON and two-mode squeezed vacuum states in the presence of small loss, while maintaining the quantum advantage over the standard quantum limit, attainable by coherent states. Finally, we propose a generation scheme of the entangled multi-component cat states with current or near-term optical technologies. (C) 2020 Optical Society of America |
