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Minimally Entangled Typical Quantum States at Finite Temperature

Steven R. White
Phys. Rev. Lett. 102, 190601 – Published 11 May 2009
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Abstract

We introduce a class of states, called minimally entangled typical thermal states, designed to resemble a typical state of a quantum system at finite temperature with a bias towards classical (minimally entangled) properties. These states reveal in an intuitive way properties such as short-range order which may often be hidden. A finite-T density matrix renormalization group algorithm is presented which is only modestly slower than the T=0 density matrix renormalization group.

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  • Received 2 March 2009

DOI:https://doi.org/10.1103/PhysRevLett.102.190601

©2009 American Physical Society

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A little entanglement helps

Published 11 May 2009

A new algorithm allows for the extremely efficient calculation of thermally averaged quantities in one dimension, in conjunction with the density matrix renormalization group method. The key is the judicious selection of a few representative states.

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Authors & Affiliations

Steven R. White

  • Department of Physics and Astronomy, University of California, Irvine, California 92697, USA

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Issue

Vol. 102, Iss. 19 — 15 May 2009

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