Dear Alps users,
I am totally new to ALPS code using quantum monte carlo. I have started to use this code for few small purpose like magnetic suceptibility vs temperature for various spin lattice models.
Currently I have used ALPS code for calculating susceptibility for ising type S=3/2 Kagome lattice. I found in the lattice library that Kagome lattice is defined. So in the tutorial mc-02-susceptibilities/ I changed tutorial2d.py by editing
#prepare the input parameters parms = [] for t in [0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.25, 1.5, 1.75, 2.0]: parms.append( { 'LATTICE' : "Kagome lattice", 'MODEL' : "spin", 'local_S' : 1.5, 'T' : t, 'J' : 4.2 , 'THERMALIZATION' : 5000, 'SWEEPS' : 50000, 'L' : 60, 'ALGORITHM' : "loop" } )
Then I changed the same way param2d file and ran the alpspython tutorial2d.py and I got strange error
/usr/local/lib/python2.7/dist-packages/matplotlib/style/core.py:203: UserWarning: In /usr/share/matplotlib/stylelib/classic.mplstyle: text.dvipnghack is obsolete. Please remove it from your matplotlibrc and/or style files. warnings.warn(message) loop parm2d.in.xml ALPS/looper version 3.2b12-20100128 (2010/01/28) multi-cluster quantum Monte Carlo algorithms for spin systems available from http://wistaria.comp-phys.org/alps-looper/ copyright (c) 1997-2010 by Synge Todo wistaria@comp-phys.org
using ALPS/parapack scheduler a Monte Carlo scheduler for multiple-level parallelization copyright (c) 1997-2016 by Synge Todo wistaria@comp-phys.org
based on the ALPS libraries version 2.3.0 available from http://alps.comp-phys.org/ copyright (c) 1994-2016 by the ALPS collaboration. Consult the web page for license details. For details see the publication: B. Bauer et al., J. Stat. Mech. (2011) P05001.
[2018-Aug-03 14:02:51]: starting scheduler on cces-System-Product-Name master input file = /home/cces/kagome-alps/mc-02/parm2d.in.xml master output file = /home/cces/kagome-alps/mc-02/parm2d.out.xml termination file = [disabled] total number of thread(s) = 1 thread(s) per clone = 1 number of thread group(s) = 1 auto evaluation = yes time limit = unlimited interval between checkpointing = 3600 seconds interval between progress report = 600 seconds interval between vmusage report = infinity task range = all worker dump format = hdf5 worker dump policy = running workers only [2018-Aug-03 14:02:51]: task status: total number of tasks = 15 new = 15, running = 0, continuing = 0, suspended = 0, finished = 0, completed = 0, skipped = 0 [2018-Aug-03 14:02:51]: starting 1 threadgroup(s) [2018-Aug-03 14:02:51]: dispatching a new clone[1,1] on threadgroup[1] WARNING: model is classically frustrated WARNING: model has negative signs
I donot understand the actual reason and how to solve this situation. I used this tutorial before and it worked for ladder spin lattice.
Can anyone please tell me what should I do to solve this situation.
Thanking you,
Santu Baidya