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1244 discussions

How does python co-work with C++ in ALPS?
by Bo Li 31 May '12

31 May '12

Dear ALPS developers, It can be found that lots of ALPS tutorials are written by python codes and the ALPS essentially written by C++. As far as I know， python can co-work with C++ by SWIG or Cpython. But It seem that ALPS does not use such two tools. I want to know: How does python co-work with C++ in ALPS? Regards, Bo Li

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Archlinux compilation errors
by Dmitry Zio 30 May '12

30 May '12

Dear developers, is it possible to compile ALPS in Archlinux? I always obtain the errors like: [ 68%] Building CXX object applications/dmft/qmc/CMakeFiles/interaction_expansion_impl.dir/interaction_expansion/solver.cpp.o In file included from /home/t/alps_build/alps/applications/dmft/qmc/interaction_expansion/interaction_expansion.hpp:40:0, from /home/t/alps_build/alps/applications/dmft/qmc/interaction_expansion/solver.cpp:30: /home/t/alps_build/alps/applications/dmft/qmc/green_function.h: In instantiation of «const green_function<T>& green_function<T>::operator=(const green_function<T>&) [with T = double; green_function<T> = green_function<double>]»: /home/t/alps_build/alps/applications/dmft/qmc/interaction_expansion/solver.cpp:104:21: required from here /home/t/alps_build/alps/applications/dmft/qmc/green_function.h:75:5: error: «memcpy» was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive] In file included from /usr/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/cstring:44:0, ... from /home/t/alps_build/alps/applications/dmft/qmc/interaction_expansion/solver.cpp:30: /usr/include/string.h:44:14: warning: «void* memcpy(void*, const void*, size_t)» declared here, later in the translation unit In file included from /home/t/alps_build/alps/applications/dmft/qmc/interaction_expansion/interaction_expansion.hpp:40:0, from /home/t/alps_build/alps/applications/dmft/qmc/interaction_expansion/solver.cpp:30: /home/t/alps_build/alps/applications/dmft/qmc/green_function.h:76:5: error: «memcpy» was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive] In file included from /usr/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/cstring:44:0, ... from /home/t/alps_build/alps/applications/dmft/qmc/interaction_expansion/solver.cpp:30: /usr/include/string.h:44:14: warning: «void* memcpy(void*, const void*, size_t)» declared here, later in the translation unit make[2]: *** [applications/dmft/qmc/CMakeFiles/interaction_expansion_impl.dir/interaction_expansion/solver.cpp.o] error 1 make[1]: *** [applications/dmft/qmc/CMakeFiles/interaction_expansion_impl.dir/all] error 2 make: *** [all] error 2 Is it compiler version issue or something else? Please, see also short discussion about that https://aur.archlinux.org/packages.php?ID=55549

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ALPS 2.1.0 has been released
by Matthias Troyer 29 May '12

29 May '12

Dear ALPS users, Version 2.1.0 of ALPS has been released, with a number of bug fixes and support for VisTrails 2.0. With this release we also introduce 64-bit builds on Windows and MacOS in addition to the 32 bit builds offered with past versions of ALPS. Best regards The ALPS team

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Re: [ALPS-users] ALPS installation in ubuntu 12.04
by Matthias Troyer 28 May '12

28 May '12

Yes, they probably should. On 28 May 2012, at 18:14, Himadri Barman wrote: > There is no instruction for the Precise Pangoline. Did you mean that the instructions for the Maverick will work for it too? > Thanks. > > On Mon, May 28, 2012 at 8:36 PM, Matthias Troyer <troyer(a)phys.ethz.ch> wrote: > Just use the instructions for the latest Ubuntu version. > > On 26 May 2012, at 11:47, Himadri Barman wrote: > >> Hi, >> >> I want to install ALPS package in the Ubuntu distribution 12.04: Precise Pangoline. >> >> I can find instructions only for the Karmic, Lucid and Maverick in the website ( http://alps.comp-phys.org/mediawiki/index.php/Download_and_install_ALPS_2) . >> >> Could you tell me what I should for the version I am using and also if there is any .deb package file? >> >> Thanks and regards, >> >> - Himadri >> >> -- >> Himadri Barman, >> PhD, >> Theoretical Sciences Unit, >> Jawaharlal Nehru Centre for Advanced Scientific Research, >> Bangalore- 560 064, >> India. >> > > > > > -- > Himadri Barman > > Theoretical Sciences Unit, > Jawaharlal Nehru Centre for Advanced Scientific Research, > Bangalore- 560 064, > India. >

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ALPS installation in ubuntu 12.04
by Himadri Barman 28 May '12

28 May '12

Hi, I want to install ALPS package in the Ubuntu distribution 12.04: Precise Pangoline. I can find instructions only for the Karmic, Lucid and Maverick in the website ( http://alps.comp-phys.org/mediawiki/index.php/Download_and_install_ALPS_2) . Could you tell me what I should for the version I am using and also if there is any .deb package file? Thanks and regards, - Himadri -- Himadri Barman, PhD, Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore- 560 064, India.

2 1

worm generated data - why so huge?
by Žiga Osolin 17 May '12

17 May '12

Dear ALPS developers, I am running worm simulations for many different parameter sets on cluster. The problem I am having is filesystem bandwidth limitation, probably mostly because other users also use the system. What I have found out when running simulation is the generated output data is quite big. I generated 72MB of data for one simulation with aprox. 20 tasks (worm simulation, 1000000 sweeps, I change t in Hubbard model from [0.03 - 0.25]). I have many different simulations, quickly generating 10GB+ of data. I am not using --write-xml option. My question is, why is the output so big? From what I understand, the only thing needed is to store all observables with their errors (+ checkpoint data). Is there any way to: minimize the output generated (so I don't contribute to bandwidth limitations of cluster) or copy only data that I need (namely averages) to my laptop? I would like to work on data not connected to cluster and copying many GBs of files seems a waste (+ is really slow on the system). Regards, Žiga Osolin

2 1

time-dependent solvers, spin-boson Hamiltonian
by Andriy Zhugayevych 10 May '12

10 May '12

My question is addressed to the developers: do you plan to implement time-dependent solvers and spin-boson/Holstein-Peierls Hamiltonian, which in typical applications requires a time-dependent solver? Adrian Feiguin's lecture gives a code for time-dependent DMRG. Is it in ALPS?

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HELP DMRG --time-limit
by User1 Alps 08 May '12

08 May '12

Hello All, I have some trouble about running dmrg program with command line options. (I am using ALPS 1.3.5 and alps-applications-1.3.5.) For example, I typed "./dmrg --time-limit 10 myjob.in.xml" for making checkpoint in 10 seconds. However, my prgram does not stop at the scheduled time. best regards Tokuro Shimokawa Kobe University, Japan

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QMC worm code and green function
by Žiga Osolin 07 May '12

07 May '12

Hi All, I have started working on my diploma project, Hubbard model with impurities. It would be really helpful if I could measure green function, but apparently MEASURE[Green Function] = True doesn't work. Looking into source code, I found the measurement code commented with a fix me comment in it. Is this feature still not implemented in ALPS worm, and what does the commented code do (and not do)? Secondly, i found out that this green function (zero output actually, with measurement commented) only generated data for (0 -> i). In inhomogeneous system, i would like all pair (i -> j). Are there any plans for this feature? Regards, Žiga Osolin

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Re: [ALPS-users] (no subject)
by Matthias Troyer 02 May '12

02 May '12

For t=0 this is just a classical Ising model and you should thus use a classical MC code, for example the ALPS spinmc code. Matthias Troyer On 2 May 2012, at 08:20, Jianming Cai wrote: > Dear Prof. Troyer, > > I use dir_loopsee to simulate the hardcore boson model on a triangular lattice as follows: > > <HAMILTONIAN name="hardcore boson"> > <PARAMETER name="V0" default="1"/> > <PARAMETER name="V1" default="1"/> > <PARAMETER name="V2" default="1"/> > <PARAMETER name="t" default="0"/> > <PARAMETER name="t0" default="t"/> > <PARAMETER name="t1" default="t"/> > <PARAMETER name="t2" default="t"/> > <PARAMETER name="mu" default="0"/> > <PARAMETER name="cm" default="mu+V0+V1+V2"/> > <BASIS ref="hardcore boson"/> > <SITETERM site="i"> > <PARAMETER name="mu#" default="cm"/> > -mu#*n(i) > </SITETERM> > <BONDTERM source="i" target="j"> > <PARAMETER name="t#" default="0"/> > <PARAMETER name="V#" default="0"/> > -t#*(bdag(i)*b(j)+bdag(j)*b(i)) + V#*n(i)*n(j) > </BONDTERM> > </HAMILTONIAN> > > What I use the parameter t=0, I got the following error message: > > Internal error: size of prob table is zero. > > How could I solve the problem and simulate the model with t equals to 0? > > Many thanks! > > Looking forward to your reply. > > Yours sincerely, > > Jianming >

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