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Sharma-Mittal Quantum Discord

Quantum Physics 2019-05-16 v2 Information Theory math.IT

Abstract

We demonstrate a generalization of quantum discord using a generalized definition of von-Neumann entropy, which is Sharma-Mittal entropy; and the new definition of discord is called Sharma-Mittal quantum discord. Its analytic expressions are worked out for two qubit quantum states as well as Werner, isotropic, and pointer states as special cases. The R{\'e}nyi, Tsallis, and von-Neumann entropy based quantum discords can be expressed as limiting cases for of Sharma-Mittal quantum discord. We also numerically compare all these discords and entanglement negativity.

Keywords

Cite

@article{arxiv.1812.00752,
  title  = {Sharma-Mittal Quantum Discord},
  author = {Souma Mazumdar and Supriyo Dutta and Partha Guha},
  journal= {arXiv preprint arXiv:1812.00752},
  year   = {2019}
}

Comments

This article is similar to the one published in Quantum Information Processing (2019) 18 (6), 169

R2 v1 2026-06-23T06:29:17.898Z