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We have decided to discontinue the publication of preprints on our preprint server as of 1 March 2024. The publication culture within mathematics has changed so much due to the rise of repositories such as ArXiV (www.arxiv.org) that we are encouraging all institute members to make their preprints available there. An institute's repository in its previous form is, therefore, unnecessary. The preprints published to date will remain available here, but we will not add any new preprints here.

MiS Preprint
53/2020

A Sufficient Entanglement Criterion Based On Quantum Fisher Information and Variance

Qing-Hua Zhang and Shao-Ming Fei

Abstract

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.

Received:
May 8, 2020
Published:
May 14, 2020

Related publications

inJournal
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