Work

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

Year: 2020

Type: article

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 Schrödinger 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.

Source: Journal of the Optical Society of America B

DOI: 10.1364/josab.393200

Authors: Seung-Woo Lee, Su-Yong Lee, Jaewan Kim

Institutions: Korea Institute for Advanced Study, Agency for Defense Development

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funder: Agency for Defense Development

OpenAlex ID: W3036831230

FWCI: 0.758

Cites: 43

Cited by: 10

Related to: 10