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- density matrix renormalization group algorithm is presented which is only modestly slower than the density matrix renormalization group.
- Received 2 March 2009
DOI:https://doi.org/10.1103/PhysRevLett.102.190601
©2009 American Physical Society
Viewpoint
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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