DMRG and periodic boundary conditions: a quantum information perspective
F. Verstraete, D. Porras, J. I. Cirac
Abstract
We introduce a picture to analyze the density matrix renormalization group (DMRG) numerical method from a quantum information perspective. This leads us to introduce some modifications for problems with periodic boundary conditions in which the results are dramatically improved. The picture also explains some features of the method in terms of entanglement and teleportation.
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