slow down when sweep from right to left site

+1 vote
asked Dec 26, 2017 by JunjieChen (490 points)

I use dmrg function and set "Quite" to false to see the detail output. And I find that sweep from left to right is quickl while the opposite direction is much slower. Here I use a self-defined site set file for spin-1 Bose Hubbard model with total number and total magnetic moment conserved. Is there any reason for this result ? Or may be I should post my code later.

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