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Projected Entangled Pair States at Finite Temperature: Imaginary Time Evolution with Ancillas (1209.0454v2)
Published 3 Sep 2012 in cond-mat.str-el, cond-mat.quant-gas, cond-mat.stat-mech, and quant-ph
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.