An introduction to quantum discord and non-classical correlations beyond entanglement
Quantum Physics
2016-11-08 v1 Statistical Mechanics
Mathematical Physics
math.MP
Data Analysis, Statistics and Probability
Abstract
In this didactic article we explore the concept of quantum correlations beyond entanglement. We begin by introducing and motivating the classically correlated states and then showing how to quantify the quantum correlations using an entropic approach, arriving at a well known measure called the quantum discord. Quantum correlations and discord are then operationally linked with the task of local broadcasting. We conclude by providing some alternative perspectives on quantum correlations and how to measure them.
Keywords
Cite
@article{arxiv.1611.01959,
title = {An introduction to quantum discord and non-classical correlations beyond entanglement},
author = {Gerardo Adesso and Marco Cianciaruso and Thomas R. Bromley},
journal= {arXiv preprint arXiv:1611.01959},
year = {2016}
}
Comments
16 pages, 1 figure. This is an entry-level introduction to the topic, for a more advanced and comprehensive review see arXiv:1605.00806