Time evolution algorithms for Matrix Product States and DMRG

Details Time evolution algorithms for Matrix Product States and DMRG Time evolution algorithms for Matrix Product States and DMRG

2006-10-08

arxiv.org/abs/cond-mat/0610210v1

New J. Phys. 8 305 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

This work, with 18 pages and 17 figures, is a continuation/extension of cond-mat/0602305

Scientific paper

10.1088/1367-2630/8/12/305

In this work we develop several new simulation algorithms for 1D many-body quantum mechanical systems combining the Matrix Product State variational ansatz with Taylor, Pad\'e and Arnoldi approximations to the evolution operator. By comparing with previous techniques based on MPS and DMRG we demonstrate that the Arnoldi method is the best one, reaching extremely good accuracy with moderate resources. Finally we apply this algorithm to studying how correlations are transferred from the atomic to the molecular cloud when crossing a Feschbach resonance with two-species hard-core bosons in a 1D optical lattice.

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