Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Quantum discord for the general two-qubit case

Quantum discord for the general two-qubit case Recently, Girolami and Adesso (Phys Rev A 83: 052108, 2011) have demonstrated that the calculation of quantum discord for two-qubit case can be viewed as to solve a pair of transcendental equation. In the present work, we introduce the generalized Choi–Jamiolkowski isomorphism and apply it as a convenient tool for constructing transcendental equations. For the general two-qubit case, we show that the transcendental equations always have a finite set of universal solutions; this result can be viewed as a generalization of the one obtained by Ali et al. (Phys Rev A 81: 042105, 2010). For a subclass of $$X$$ X state, we find the analytical solutions by solving the transcendental equations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Quantum discord for the general two-qubit case

Wu, Xiaohua; Zhou, Tao
Quantum Information Processing , Volume 14 (6) – Mar 31, 2015
Download PDF
13 pages

Loading next page...
1
 
/lp/springer_journal/quantum-discord-for-the-general-two-qubit-case-ITqkW3wm50

References (30)

Publisher
Springer Journals
Copyright
Copyright © 2015 by Springer Science+Business Media New York
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
DOI
10.1007/s11128-015-0962-8
Publisher site
See Article on Publisher Site

Abstract

Recently, Girolami and Adesso (Phys Rev A 83: 052108, 2011) have demonstrated that the calculation of quantum discord for two-qubit case can be viewed as to solve a pair of transcendental equation. In the present work, we introduce the generalized Choi–Jamiolkowski isomorphism and apply it as a convenient tool for constructing transcendental equations. For the general two-qubit case, we show that the transcendental equations always have a finite set of universal solutions; this result can be viewed as a generalization of the one obtained by Ali et al. (Phys Rev A 81: 042105, 2010). For a subclass of $$X$$ X state, we find the analytical solutions by solving the transcendental equations.

Journal

Quantum Information Processing – Springer Journals

Published: Mar 31, 2015

There are no references for this article.