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