Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevLett.109.070501
Title: Quantum discord bounds the amount of distributed entanglement
Authors: Chuan, T.K.
Maillard, J.
Modi, K. 
Paterek, T. 
Paternostro, M.
Piani, M.
Issue Date: 16-Aug-2012
Citation: Chuan, T.K., Maillard, J., Modi, K., Paterek, T., Paternostro, M., Piani, M. (2012-08-16). Quantum discord bounds the amount of distributed entanglement. Physical Review Letters 109 (7) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevLett.109.070501
Abstract: The ability to distribute quantum entanglement is a prerequisite for many fundamental tests of quantum theory and numerous quantum information protocols. Two distant parties can increase the amount of entanglement between them by means of quantum communication encoded in a carrier that is sent from one party to the other. Intriguingly, entanglement can be increased even when the exchanged carrier is not entangled with the parties. However, in light of the defining property of entanglement stating that it cannot increase under classical communication, the carrier must be quantum. Here we show that, in general, the increase of relative entropy of entanglement between two remote parties is bounded by the amount of nonclassical correlations of the carrier with the parties as quantified by the relative entropy of discord. We study implications of this bound, provide new examples of entanglement distribution via unentangled states, and put further limits on this phenomenon. © 2012 American Physical Society.
Source Title: Physical Review Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/116548
ISSN: 00319007
DOI: 10.1103/PhysRevLett.109.070501
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

92
checked on May 18, 2018

WEB OF SCIENCETM
Citations

91
checked on Mar 27, 2018

Page view(s)

13
checked on Apr 19, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.