Enhancement of quantum correlations in qubit–qutrit system under decoherence of finite temperature

Enhancement of quantum correlations in qubit–qutrit system under decoherence of finite temperature We investigate the dynamics and protection of quantum correlations of a qubit–qutrit system under local amplitude damping channels with finite temperature. The comparison between entanglement and geometric measure of quantum discord (GMQD) is analyzed. It is found that the GMQD is more robust than the entanglement against the decoherence induced by the channels. Special attention is paid to how to protect the quantum correlations from decoherence by weak measurement and measurement reversal. We find that the weak measurement is not necessary when the initial state is maximally entangled. But for other initial states, a successful protection of quantum correlations requires combined weak measurement and measurement reversal. Under certain conditions, we also notice that we can realize the protection at finite temperature for GMQD, but not for entanglement. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Enhancement of quantum correlations in qubit–qutrit system under decoherence of finite temperature

Loading next page...
 
/lp/springer_journal/enhancement-of-quantum-correlations-in-qubit-qutrit-system-under-1LRFrSJ3wO
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
D.O.I.
10.1007/s11128-015-0939-7
Publisher site
See Article on Publisher Site

Abstract

We investigate the dynamics and protection of quantum correlations of a qubit–qutrit system under local amplitude damping channels with finite temperature. The comparison between entanglement and geometric measure of quantum discord (GMQD) is analyzed. It is found that the GMQD is more robust than the entanglement against the decoherence induced by the channels. Special attention is paid to how to protect the quantum correlations from decoherence by weak measurement and measurement reversal. We find that the weak measurement is not necessary when the initial state is maximally entangled. But for other initial states, a successful protection of quantum correlations requires combined weak measurement and measurement reversal. Under certain conditions, we also notice that we can realize the protection at finite temperature for GMQD, but not for entanglement.

Journal

Quantum Information ProcessingSpringer Journals

Published: Feb 4, 2015

References

  • Quantum information and computation
    Bennett, CH; Sicincenzo, DP
  • Geometric measure of quantum discord
    Luo, SL; Fu, SS
  • Protecting entanglement from decoherence using weak measurement and quantum measurement reversal
    Kim, YS; Lee, JC; Kwon, O; Kim, YH

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off