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MiS Preprint

A Sufficient Entanglement Criterion Based On Quantum Fisher Information and Variance

Qing-Hua Zhang and Shao-Ming Fei


We derive criterion in the form of inequality based on quantum Fisher information and quantum variance to detect multipartite entanglement. It can be regarded as complementary of the well-established PPT criterion in the sense that it can also detect bound entangled states. The inequality is motivated by Y.Akbari-Kourbolagh $et\ al.$[Phys. Rev A. 99, 012304 (2019)] which introduced a multipartite entanglement criterion based on quantum Fisher information. Our criterion is experimentally measurable for detecting any $N$-qudit pure state mixed with white noisy. We take several examples to illustrate that our criterion has good performance for detecting certain entangled states.

May 8, 2020
May 14, 2020

Related publications

2020 Repository Open Access
Qing-Huo Zhang and Shao-Ming Fei

A sufficient entanglement criterion based on quantum Fisher information and variance

In: Laser physics letters, 17 (2020) 6, p. 065202