Local, nonlocal quantumness and information theoretic measures

Agrawal, Pankaj ; Sazim, Sk ; Chakrabarty, Indranil ; Pati, Arun K. (2016) Local, nonlocal quantumness and information theoretic measures International Journal of Quantum Information, 14 (06). Article ID 1640034-13 pages. ISSN 0219-7499

Full text not available from this repository.

Official URL: http://www.worldscientific.com/doi/abs/10.1142/S02...

Related URL: http://dx.doi.org/10.1142/S0219749916400347

Abstract

It has been suggested that there may exist quantum correlations that go beyond entanglement. The existence of such correlations can be revealed by information theoretic quantities such as quantum discord, but not by the conventional measures of entanglement. We argue that a state displays quantumness, that can be of local and nonlocal origin. Information theoretic measures not only characterize the nonlocal quantumness, but also the local quantumness, such as the “local superposition”. This can be a reason, why such measures are nonzero, when there is no entanglement. We consider a generalized version of the Werner state to demonstrate the interplay of local quantumness, nonlocal quantumness and classical mixedness of a state.

Item Type:Article
Source:Copyright of this article belongs to World Scientific Publishing Company.
Keywords:Quantum Discord; Entanglement and Superposition
ID Code:105536
Deposited On:09 Mar 2018 11:41
Last Modified:09 Mar 2018 11:41

Repository Staff Only: item control page