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arXiv:2409.17689

Entanglement witnesses with local partial ordering

Joshua Carlo A. Casapao, Eric A. Galapon

Published Sep 26, 2024• 0 citations
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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.

DOI
10.48550/arxiv.2409.17689

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