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

• URL: http://arxiv.org/abs/2106.13106v1
• Date: Thu, 24 Jun 2021 15:41:50 GMT
• Title: Detecting Einstein-Podolsky-Rosen steering in non-Gaussian spin states from conditional spin-squeezing parameters
• Authors: Jiajie Guo, Feng-Xiao Sun, Daoquan Zhu, Manuel Gessner, Qiongyi He, Matteo Fadel
• Abstract summary: We present an experimentally practical method to reveal Einstein-Podolsky-Rosen steering in non-Gaussian spin states. Our criterion is based on the quantum Fisher information, and uses bounds derived from generalized spin-squeezing parameters.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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.

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