April 2006 - Comp-phys-alps-users

Re: [ALPS-users] spinmc on 3d fcc lattice
by Matthias Troyer 27 Apr '06

27 Apr '06

On Apr 27, 2006, at 10:14 AM, Aleksander Wittlin wrote: > >> Run it individually on each of the *task*.out.xml files *after* >> running spinmc >> >> Best regards >> Matthias >> > Tried but apparently I miss something like "jobfile" (see below). > Regards, > Aleksander > > [wittlin@wittlin1 classical3]$ spinmc_evaluate fcc7.task1.out.xml > Generic classical Monte Carlo program using local or cluster updates > available from http://alps.comp-phys.org/ > copyright(c) 1999-2004 by Matthias Troyer <troyer(a)comp-phys.org> > Fabian Stoeckli > Mathias Koerner <mkoerner(a)comp-phys.org> > for details see the publication: > F. Alet et al., Report cond-mat/0410407. > > using the ALPS parallelizing scheduler > copyright (c) 1994-2004 by Matthias Troyer <troyer(a)comp-phys.org>. > see Lecture Notes in Computer Science, Vol. 1505, p. 191 (1998). > > based on the ALPS libraries version 1.2.2 > available from http://alps.comp-phys.org/ > copyright (c) 1994-2004 by the ALPS collaboration. > consult the web page for license details. > for details see the publication: F. Alet et al., Report cond-mat/ > 0410407. > > Starting all processes > missing <JOB> element in jobfile Can you try using version 1.3a1 of ALPS, which we have on the web page? Matthias

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Re: [ALPS-users] spinmc on 3d fcc lattice
by Matthias Troyer 27 Apr '06

27 Apr '06

On Apr 27, 2006, at 6:50 AM, Aleksander Wittlin wrote: > Dear Dr Troyer, > > yet another question/ request for your assistance: > > there is a note at the description of spinmc, > saying that: > "To evaluate the specific heat the evaluation program > spinmc_evaluate has to > be run on the task files (*task*.xml)." > > Does it mean that one should use spinmc_evaluate *instead* of > spinmc on the > xxx.task*.in.xml parameter files, or should one run spinmc_evaluate > *after* > spinmc. Run it individually on each of the *task*.out.xml files *after* running spinmc Best regards Matthias

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Re: [ALPS-users] spinmc on 3d fcc lattice
by Matthias Troyer 24 Apr '06

24 Apr '06

On Apr 24, 2006, at 7:31 AM, Aleksander Wittlin wrote: > Dear Dr Troyer, > > I am sorry to bother you with perhaps trivial question. > I am trying to run the spinmc code with > dr's Todo fcc lattice definition. It > works, however some diagnostics seems still cryptic to me. > For example for the below enclosed parameters file > I get for some temperatures ERROR "converged"="yes" > and for somewhat higher, presumably closer to the > phase transition "converged"="no". Should I tinker with > parameters or is it OK? converge=no means that you have to run for a larger number of sweeps. This is natural close to the phase transition or at very low temperatures since there the autocorrelation times increase. The best procedure is to start from very small systems, and only increase the system size once you see that you get good convergence of the errors. As long as they are not converged, it is hard to trust the results since the error bar is most likely much larger than estimated. Best regards Matthias Troyer

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