July 2020 - Comp-phys-alps-users

J1-J2-model in Alps
by Rasmus Tang 09 Aug '20

09 Aug '20

Dear Alps users I am trying to do a QMC simulation of the J1-J2-model on the s=1 rectangular lattice using the "dirloop_sse" app. I am fairly new to using Alps, so I was wondering if someone would verify that my input parameters are correct. My parameter files contains: <?xml version="1.0" encoding="UTF-8"?> <?xml-stylesheet type="text/xsl" href="ALPS.xsl"?> <SIMULATION xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://xml.comp-phys.org/2003/8/QMCXML.xsd"> <PARAMETERS> <PARAMETER name="local_S">1</PARAMETER> <PARAMETER name="L">20</PARAMETER> <PARAMETER name="SWEEPS">10000</PARAMETER> <PARAMETER name="LATTICE">anisotropic square lattice</PARAMETER> <PARAMETER name="SEED">1261183832</PARAMETER> <PARAMETER name="T">2</PARAMETER> <PARAMETER name="W">6</PARAMETER> <PARAMETER name="MODEL">spin</PARAMETER> <PARAMETER name="a">1</PARAMETER> <PARAMETER name="b">1.7446285117511835</PARAMETER> <PARAMETER name="THERMALIZATION">100000</PARAMETER> <PARAMETER name="J0">1</PARAMETER> <PARAMETER name="J1">0.25</PARAMETER> <PARAMETER name="h">0</PARAMETER> </PARAMETERS> </SIMULATION> Kind regards, Rasmus Tang

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Installation of ALPS in Windows
by PROBAL NAG 25 Jul '20

25 Jul '20

Hi, I am Probal Nag, a research scholar from IISER-Thiruvananthapuram. I am currently trying to install ALPS on Windows system by following the document on installing the binary releases on Windows. I have downloaded alps-2.2.b3 for windows followed by the required aps-vistrails module from the download page and also Vistrails 2.1.2. However, after installation, while trying to activate the ALPS module from the preference, I face an error while enabling alps. I get the error Critical message: Module Tools|MplXYPlotCell in package org.comp-phys.alps (version 2.2.0) is out-of-date. Please check with the package developer for a new version. I will be extremely grateful to you if you could help me out.

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Fwd: Problems with empty output files
by Rasmus Tang 23 Jul '20

23 Jul '20

Dear Alps users I am completely new to using Alps; I have just tried to run some tutorials from the wiki page using python. However, even that proved to be more difficult than expected. My problem is that the output file(s) from the simulation seem to be empty. I succeed in setting up the tutorial and it starts running, but crashes quickly. The problem comes when running tutorial-full.py. See error message below: ### Checking if it is finished: not yet, next check in 5 seconds ( 26% done). Checking if it is finished: not yet, next check in 5 seconds ( 0% done). Halted Simulation 1 HDF5 error: -1 #0 C:\bld\hdf5_1519266479706\work\hdf5-1.10.1\src\H5D.c line 145 in H5Dcreate2(): unable to create dataset #1 C:\bld\hdf5_1519266479706\work\hdf5-1.10.1\src\H5Dint.c line 490 in H5D__create_named(): unable to create and link to dataset #2 C:\bld\hdf5_1519266479706\work\hdf5-1.10.1\src\H5L.c line 1695 in H5L_link_object(): unable to create new link to object #3 C:\bld\hdf5_1519266479706\work\hdf5-1.10.1\src\H5L.c line 1939 in H5L_create_real(): can't insert link #4 C:\bld\hdf5_1519266479706\work\hdf5-1.10.1\src\H5Gtraverse.c line 867 in H5G_traverse(): internal path traversal failed #5 C:\bld\hdf5_1519266479706\work\hdf5-1.10.1\src\H5Gtraverse.c line 639 in H5G_traverse_real(): traversal operator failed #6 C:\bld\hdf5_1519266479706\work\hdf5-1.10.1\src\H5L.c line 1731 in H5L_link_cb(): name already exists In ..\..\..\src\alps\hdf5\archive.cpp on 133 in alps::hdf5::detail::resource<&int __cdecl alps::hdf5::detail::noop(__int64)>::resource Loading results from the files: ['.\\parm1.task1.out.h5'] The files contain the following mesurements: [['(beta * Energy)^2 / N', 'Bond-type Energy']] Traceback (most recent call last): File "tutorial-full.py", line 66, in <module> plotdata = pyalps.collectXY(data,'T','|Magnetization|') File "C:\Users\gogog\anaconda3\envs\py2\lib\site-packages\pyalps\tools.py", line 604, in collectXY if iset.props['observable'] != y and not y in iset.props: AttributeError: 'list' object has no attribute 'props' ### I also tried running tutorial2c.py, a simulation of the susceptibility of a quantum spin chain. The program runs (very quickly) and then plots an empty graph - again the problem is that the output file "parm2c.out.xml" is completely empty. I hope some of you can pinpoint the problem and help me run these tutorials successfully. Kind regards, Rasmus Tang University of Copenhagen

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A new way to build ALPS under Linux and MacOS
by sinan bulut 01 Jul '20

01 Jul '20

Hi all, I've recently created an ALPS package within Spack, an HPC package manager. Spack enables building ALPS and all its dependencies from scratch with a single line of command. Furthermore, Spack automatically optimizes the build (vectorisation etc) for the CPU architectures of interest. I thought some of you might be interested to check it out, also it might be useful to list it under the installation methods page of ALPS wiki. $ git clone https://github.com/spack/spack.git $ cd spack/bin $ ./spack install alps $ ./spack load alps Alps doesn't build with gcc =>7, so if the default compiler on your system satisfies that, you might also want to install an older version of gcc in your system or just build it from scratch with Spack (which might take up to a few hours) $ ./spack install gcc(a)6.5.0 $ ./spack load gcc(a)6.5.0 $ ./spack compiler find $ ./spack install alps%gcc(a)6.5.0 Hope some of you will find this useful.

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