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Density Matrix Renormalization Group and Periodic Boundary Conditions: A Quantum Information Perspective

2004; American Physical Society; Volume: 93; Issue: 22 Linguagem: Inglês

10.1103/physrevlett.93.227205

1092-0145

Frank Verstraete, Diego Porras, J. I. Cirac,

Quantum and electron transport phenomena

We introduce a picture to analyze the density matrix renormalization group (DMRG) numerical method from a quantum information perspective. This leads to a variational formulation of DMRG which allows for dramatic improvements in the case of problems with periodic boundary conditions. The picture also explains some features of the method in terms of entanglement and teleportation.