Sharma-Mittal Quantum Discord

Understand

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.