Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 2054
Articles: 1'873'957
Articles rated: 2568

26 May 2019
 
  » » arxiv » 241539

  Article forum


Quantum Phase Transitions and Bipartite Entanglement
Lian-Ao Wu ; Marcelo S. Sarandy ; Daniel A. Lidar ;
Rating Members: 5/5 (1 reader) | Visitors: 5/5 (1 visitor)
Date 7 Jul 2004
Journal Phys. Rev. Lett. 93, 250404 (2004)
Subject Quantum Physics; Statistical Mechanics | quant-ph cond-mat.stat-mech
AffiliationCenter for Quantum Information and Quantum Control, University of Toronto
AbstractWe develop a general theory of the relation between quantum phase transitions (QPTs) characterized by nonanalyticities in the energy and bipartite entanglement. We derive a functional relation between the matrix elements of two-particle reduced density matrices and the eigenvalues of general two-body Hamiltonians of $d$-level systems. The ground state energy eigenvalue and its derivatives, whose non-analyticity characterizes a QPT, are directly tied to bipartite entanglement measures. We show that first-order QPTs are signalled by density matrix elements themselves and second-order QPTs by the first derivative of density matrix elements. Our general conclusions are illustrated via several quantum spin models.
Source arXiv, quant-ph/0407056
Other source [GID 794622] pmid15697878
Services Forum | Review | PDF | Favorites   
 

No message found in this article forum.  You have a question or message about this article? Ask the community and write a message in the forum.
If you want to rate this article, please use the review section..

Subject of your forum message:
Write your forum message below (min 50, max 2000 characters)

2000 characters left.
Please, read carefully your message since you cannot modify it after submitting.

  To add a message in the forum, you need to login or register first. (free): registration page






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2019 - Scimetrica