search

issp-center-dev / dsqss

DSQSS -- Discrete Space Quantum System Solver
http://www.pasums.issp.u-tokyo.ac.jp/dsqss/
GNU General Public License v3.0
11 stars 3 forks source link

Transverse field four times smaller? #22

Closed ryuikaneko closed 4 years ago

ryuikaneko commented 4 years ago

Hi,

The transverse field "Gamma" given in the XXZ model seems four times smaller in PMWA (ver.2.0.2). I attach std.in for the 1D FM TFIsing model (L=8,beta=8) and comparison of Mx vs. Gamma with that in the thermodynamic limit at T=0 (fig_L8_beta8.png, fig_L8_beta8_Gamma_rescaled.png).

std.in

original: fig_L8_beta8

Gamma rescaled: fig_L8_beta8_Gamma_rescaled

Ryui

yomichi commented 4 years ago

@ryuikaneko I'm sorry for the late reply and thank you for reporting. I found that we had a mistake in the transformation of Hamiltonian from the spin system to the bosonic system. (the factor of 4 came from division by 2 instead of multiplication by 2)

I will release a new bug-fixed release v2.0.3 in a couple of days.

ryuikaneko commented 4 years ago

Great!