Detecting Einstein-Podolsky-Rosen steering in non-Gaussian spin states from conditional spin-squeezing parameters

We present an experimentally practical method to reveal Einstein-Podolsky-Rosen steering in non-Gaussian spin states by exploiting a connection to quantum metrology. Our criterion is based on the quantum Fisher information, and uses bounds derived from generalized spin-squeezing parameters that invo...

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Bibliographic Details
Published in:arXiv.org 2021-06
Main Authors: Guo, Jiajie, Feng-Xiao, Sun, Zhu, Daoquan, Gessner, Manuel, He, Qiongyi, Fadel, Matteo
Format: Article
Language:English
Subjects:
Compressing
Parameters
Steering
Online Access:Get full text
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Summary:We present an experimentally practical method to reveal Einstein-Podolsky-Rosen steering in non-Gaussian spin states by exploiting a connection to quantum metrology. Our criterion is based on the quantum Fisher information, and uses bounds derived from generalized spin-squeezing parameters that involve measurements of higher-order moments. This leads us to introduce the concept of conditional spin-squeezing parameters, which quantify the metrological advantage provided by conditional states, as well as detect the presence of an EPR paradox.
ISSN:2331-8422
DOI:10.48550/arxiv.2106.13106