- Comp-phys-alps-users - lists.phys.ethz.ch

3D XY model with ALPS
by Alvise Scarpa 03 Jul '12

03 Jul '12

Hi, I'd need to simulate a three-dimensional XY model, studying the helicity modulus as a function of temperature. (3D XY means that the sites are defined on a cubic lattice, while the spins are constrained on a plane) I'd have a few questions: 0) Can I do that with ALPS? (I suppose the answer will be yes...) 1) Is it possible to do that just from a parameter file, without using the Python interface? In particular, how is it possibile to measure the helicity modulus? 2) Is there any place where I could find a relevant parameter file, or one I could adapt to fit my needs? Thanks in advance (and sorry if the question is too silly, I have been playing with ALPS for a couple of days so far! I have searched for my issues in the documentation by I could not find relevant examples!) Best Regards, Alvise

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entanglement entropy in DMRG
by grover＠berkeley.edu 21 Jun '12

21 Jun '12

Hi All! I am very new to ALPS and trying to use it for DMRG of simple one-dimensional models. I would be thankful if someone can point out to me the python command in ALPS to access entanglement entropy (or better, the entanglement spectrum) that is generated at the end of DMRG convergence. Thank you, Sincerely, Tarun ps: I am assuming that the entanglement entropy in ALPS DMRG corresponds to the partition that divides the system into two-halves.

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alpspython
by Tadeusz Wasiutyński 11 Jun '12

11 Jun '12

Hello, it would be very convenient for me to analyse results on my laptop by alpspython without compiling the whole ALPS package. Is there an easy way to grub necessary files? Regards Tadeusz Wasiutynski

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fitting of experimental data
by Dmitry 09 Jun '12

09 Jun '12

Dear all, in the description of ALPS there is a note about the possibility of experimental data fitting. Unfortunately, I can't find in tutorials and documentation the way how to fit, for example, experimental susceptibility data with the simulations from ALPS. In the code I've found just fit_wrapper function. Should I use it (or another) for parameter optimization or it's need to write own optimizer? Thanks in advance.

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Which XML parser the ALPS use?
by Bo Li 01 Jun '12

01 Jun '12

Dear ALPS developers, The Hamiltonian in ALPS is defined by a XML file. Which XML parser the ALPS use, Xerces-c++-XML parser or Boost-c++-XML parser? Regards, Bo Li

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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.

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