Projected Entangled Pair States at Finite Temperature: Imaginary Time Evolution with Ancillas
arXiv:1209.0454 · doi:10.1103/PhysRevB.86.245101
Abstract
A projected entangled pair state (PEPS) with ancillas is evolved in imaginary time. This tensor network represents a thermal state of a 2D lattice quantum system. A finite temperature phase diagram of the 2D quantum Ising model in a transverse field is obtained as a benchmark application.
7 pages, 9 figures; version accepted to publication in Phys. Rev. B; added new numerical results and references
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