Time-dependent variational principle for quantum lattices

Details Time-dependent variational principle for quantum lattices Time-dependent variational principle for quantum lattices

2011-03-04

arxiv.org/abs/1103.0936v2

Phys. Rev. Lett. 107, 070601 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

main text (4+ pages, 2 figures, 1 table) + supplementary material (15 pages, 2 figures). Corrections and other small changes,

Scientific paper

10.1103/PhysRevLett.107.070601

We develop a new algorithm based on the time-dependent variational principle applied to matrix product states to efficiently simulate the real- and imaginary time dynamics for infinite one-dimensional quantum lattice systems. This procedure: (1) is argued to be optimal; (2) does not rely on the Trotter decomposition and thus has no Trotter error; (3) explicitly preserves all symmetries and conservation laws; and (4) has low computational complexity. The algorithm is illustrated using both imaginary time and real-time examples.

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