Optimal quantum phase estimation with generalized multi-component Schrodinger cat states

• URL: http://arxiv.org/abs/2003.06302v2
• Date: Wed, 29 Jul 2020 08:10:53 GMT
• Title: Optimal quantum phase estimation with generalized multi-component Schrodinger cat states
• Authors: Seung-Woo Lee, Su-Yong Lee, Jaewan Kim
• Abstract summary: We investigate the optimal quantum phase estimation with generalized multi-component Schrodinger cat states. We show 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. We propose a generation scheme of the entangled multi-component cat states with current or near-term optical technologies.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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