Entanglement witnesses with local partial ordering

• URL: http://arxiv.org/abs/2409.17689v1
• Date: Thu, 26 Sep 2024 09:55:21 GMT
• Title: Entanglement witnesses with local partial ordering
• Authors: Joshua Carlo A. Casapao, Eric A. Galapon,
• Abstract summary: We investigate a class of entanglement witnesses where each witness is formulated as a difference of two product observables. We provide a framework to construct these entanglement witnesses along with some examples.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate a class of entanglement witnesses where each witness is formulated as a difference of two product observables. These observables are decomposable into positive semidefinite local operators that obey a partial ordering rule defined over all their possible expectation values. We provide a framework to construct these entanglement witnesses along with some examples. We also discuss methods to improve them both linearly and nonlinearly.

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