First order phase transition in the anisotropic quantum orbital compass model

Orus, Roman, Doherty, Andrew C. and Vidal, Guifre (2009) First order phase transition in the anisotropic quantum orbital compass model. Physical Review Letters, 102 7: 077203.1-077203.4. doi:10.1103/PhysRevLett.102.077203

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Author Orus, Roman
Doherty, Andrew C.
Vidal, Guifre
Title First order phase transition in the anisotropic quantum orbital compass model
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 2009-02-19
Year available 2009
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.102.077203
Open Access Status File (Publisher version)
Volume 102
Issue 7
Start page 077203.1
End page 077203.4
Total pages 4
Editor George Basbas
Jack Sandweiss
Reinhardt B. Schuhmann
Stanley G. Brown
Place of publication College Park, MD, United States
Publisher American Physical Sociey
Collection year 2010
Language eng
Subject C1
970102 Expanding Knowledge in the Physical Sciences
020603 Quantum Information, Computation and Communication
Abstract We investigate the anisotropic quantum orbital compass model on an infinite square lattice by means of the infinite projected entangled-pair state algorithm. For varying values of the Jx and Jz coupling constants of the model, we approximate the ground state and evaluate quantities such as its expected energy and local order parameters. We also compute adiabatic continuations of the ground state, and show that several ground states with different local properties coexist at Jx=Jz. All our calculations are fully consistent with a first order quantum phase transition at this point, thus corroborating previous numerical evidence. Our results also suggest that tensor network algorithms are particularly fitted to characterize first order quantum phase transitions.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
2010 Higher Education Research Data Collection
ERA 2012 Admin Only
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Citation counts: TR Web of Science Citation Count  Cited 60 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 58 times in Scopus Article | Citations
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Created: Thu, 03 Sep 2009, 08:35:02 EST by Mr Andrew Martlew on behalf of School of Mathematics & Physics