Comp-phys-alps-users

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1244 discussions

histogram for observables
by Kubila 24 Apr '11

24 Apr '11

Hi all In ALPS (both 1.3 and 2.0), a simple evaluation will lead to the mean values and errors (obtained by binning) for the measured observables. Is there a way to get the measured results for each sweep? Thanks in advance! Sincerely, kubila

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Dzyaloshinsky- Moriya interaction
by kaveh edalat 23 Apr '11

23 Apr '11

Dear All Is it possible to include Dzyaloshinsky- Moriya (DM) interaction to the Hamiltonian to do classical Monte Carlo (in 3D lattice) with ALPS? Best regards Kaveh

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Brian Keith wants to stay in touch on LinkedIn
by Brian Keith 22 Apr '11

22 Apr '11

LinkedIn ------------ I'd like to add you to my professional network on LinkedIn. - Brian Keith Brian Keith Student at Clark University Greater Boston Area Confirm that you know Brian Keith https://www.linkedin.com/e/r4vp3k-gmtm0q2p-4m/isd/2747070565/LQ1tQH-T/ -- (c) 2011, LinkedIn Corporation

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Re: [ALPS-users] Comp-phys-alps-users Digest, Vol 61, Issue 10
by 孙照宇 21 Apr '11

21 Apr '11

Thank you very much for the reply ! Now I have another question about DMRG of finite version. By using infinite DMRG method, first I increase the size of the system to 2L. Then I use the finite DMRG method with 2L fixed. After finite-size sweeping for 6-10 times, the energy of the system converges very well. However, when paying attention to the correlation function, I am confused by the following results. In the infinite-method procedure, I have obtained the size-dependence of the correlation function of the two sites in the middle of the chain. which we label as G(i), i=1,2,...,2L. While in the finite procedure, after several sweep, I also obtain a position-dependence of the same two-site correlation function, which we label as P(i), i=1,2,..., 2L. P(i) is converged and the curve (or shape) does not change any more with further finite-size sweeps, just like the energy. Sometimes I find the shape of G(i) is very similar to the converged shape of P(i), which means that the ground-state wave-function can be obtained accurately by the infinite method and the finite-size sweep is not needed at all. Please see "good.png". However, sometimes the shape of G(i) is quite different from the shape of P(i), which seems that the ground-state wave-function obtained with the infinite-method is quite inaccurate. Please see "bad.png". Now my question is: The infinite-method result is the starting point of the finite-size sweep. Suppose the starting point (the results from the infinite-method ) is not reliable. Then the following finite-size sweep is still credible or not incredible at all ? I'd like to mention that the energy of the system converges very well in the finite-size sweep. Any comments are valuable to me. 2011/4/21 <comp-phys-alps-users-request(a)lists.phys.ethz.ch>: > Send Comp-phys-alps-users mailing list submissions to > comp-phys-alps-users(a)lists.phys.ethz.ch > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.phys.ethz.ch/listinfo/comp-phys-alps-users > or, via email, send a message with subject or body 'help' to > comp-phys-alps-users-request(a)lists.phys.ethz.ch > > You can reach the person managing the list at > comp-phys-alps-users-owner(a)lists.phys.ethz.ch > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Comp-phys-alps-users digest..." > > > Today's Topics: > > 1. About superposition state and DMRG (???) > 2. Re: About superposition state and DMRG (Matthias Troyer) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 20 Apr 2011 19:30:39 +0800 > From: ??? <sunzhaoyu2000(a)gmail.com> > Subject: [ALPS-users] About superposition state and DMRG > To: comp-phys-alps-users(a)lists.phys.ethz.ch > Message-ID: <BANLkTindbVsV1z8Fn5rT96x9iXSQUwyD=w(a)mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Dear ALPS users and developers: > > Suppose the ground-state of a quantum chain is twofold degenerate in > the thermodynamic limit(L is large enough), > while in a finite-size system(such as L=14,16,18), the ground state is > just a superposition of these two states, and no degeneration would > occur. > > Now my question is: Is DMRG applicable to a small size system whose > ground-state is a superposition state ? > ( I know that by imposing some special boundary conditions, one of the > two states could be projected out. > Here I need to use a standard open boundary condition. ) > > Any suggestion or comment would be valuable to me. > > > sunzhaoyu2000(a)gmail.com > > > ------------------------------ > > Message: 2 > Date: Wed, 20 Apr 2011 13:34:17 +0200 > From: Matthias Troyer <troyer(a)phys.ethz.ch> > Subject: Re: [ALPS-users] About superposition state and DMRG > To: comp-phys-alps-users(a)lists.phys.ethz.ch > Message-ID: <F267D0BA-C0EA-421B-8CEB-4743AE7C5A12(a)phys.ethz.ch> > Content-Type: text/plain; charset=utf-8 > > DMRG certainly can be applied. If the finite size gap between the two degenerate states is large enough then you should even be able to get both states individually. > > Matthias > > > On Apr 20, 2011, at 1:30 PM, ??? wrote: > >> Dear ALPS users and developers: >> >> Suppose the ground-state of a quantum chain is twofold degenerate in >> the thermodynamic limit(L is large enough), >> while in a finite-size system(such as L=14,16,18), the ground state is >> just a superposition of these two states, and no degeneration would >> occur. >> >> Now my question is: Is DMRG applicable to a small size system whose >> ground-state is a superposition state ? >> ( I know that by imposing some special boundary conditions, one of the >> two states could be projected out. >> Here I need to use a standard open boundary condition. ) >> >> Any suggestion or comment would be valuable to me. >> >> >> sunzhaoyu2000(a)gmail.com >> > > > > End of Comp-phys-alps-users Digest, Vol 61, Issue 10 > **************************************************** >

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About superposition state and DMRG
by 孙照宇 20 Apr '11

20 Apr '11

Dear ALPS users and developers: Suppose the ground-state of a quantum chain is twofold degenerate in the thermodynamic limit(L is large enough), while in a finite-size system(such as L=14,16,18), the ground state is just a superposition of these two states, and no degeneration would occur. Now my question is: Is DMRG applicable to a small size system whose ground-state is a superposition state ? ( I know that by imposing some special boundary conditions, one of the two states could be projected out. Here I need to use a standard open boundary condition. ) Any suggestion or comment would be valuable to me. sunzhaoyu2000(a)gmail.com

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TIME in looper headers causes ALPS compile to crash
by Wolfram Brenig 20 Apr '11

20 Apr '11

Hi, compiling ALPS on SuSE 11.4 crashes with errors as listed at the end of this mail. [gcc version 4.5.1 20101208 [gcc-4_5-branch revision 167585] (SUSE Linux), kernel 2.6.37.1-1.2-desktop] The err msgs seem to point to the 'TIME' typename in a bunch of header files in alps_whatever/applications/qmc/looper/looper, namely in correlation.h susceptibility.h measurement.h custom.h operator.h stiffness.h Indeed, simply changing 'TIME' in these headers into something else, say 'MyTIME', does away with the compile error. However if this fix will induce other errors at run-time, I don't know? Does anybody have a clue on this? Wolfram Brenig PS.: Actually, there seems to be a somehow similar issue with VTK, over which I stumbled while compiling it prior to vistrails, and which seems to have bugged also others: http://comments.gmane.org/gmane.comp.lib.vtk.user/55300 compile errs:-------------------------------------------- [ 49%] Building CXX object applications/qmc/looper/CMakeFiles/loop.dir/loop_custom.C.o cd /home/userxx/temporary/alpsbuilt/applications/qmc/looper && /usr/bin/c++ -O3 -march=core2 -DNDEBUG -I/usr/local/include -I/usr/lib64/python2.7/site-packages/numpy/core/include -I/usr/include/python2.7 -I/home/userxx/temporary/alpsbuilt/src -I/home/userxx/temporary/alps/src -I/home/userxx/temporary/alps/applications/qmc/looper -o CMakeFiles/loop.dir/loop_custom.C.o -c /home/userxx/temporary/alps/applications/qmc/looper/loop_custom.C In file included from /home/userxx/temporary/alps/applications/qmc/looper/looper/correlation.h:29:0, from /home/userxx/temporary/alps/applications/qmc/looper/loop_config.h:38, from /home/userxx/temporary/alps/applications/qmc/looper/loop_custom.C:26: /home/userxx/temporary/alps/applications/qmc/looper/looper/measurement.h:182:72: error: expected nested-name-specifier before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/measurement.h:182:72: error: expected ‘>’ before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/measurement.h:418:48: error: expected nested-name-specifier before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/measurement.h:418:48: error: expected ‘>’ before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/measurement.h:422:13: error: expected unqualified-id before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/measurement.h:483:48: error: expected nested-name-specifier before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/measurement.h:483:48: error: expected ‘>’ before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/measurement.h:490:13: error: expected unqualified-id before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/measurement.h:491:49: error: type/value mismatch at argument 3 in template parameter list for ‘template<class MEASUREMENT1, class MEASUREMENT2> template<class MC, class LAT, int <anonymous> > struct looper::composite_measurement<M1, M2>::estimator’ /home/userxx/temporary/alps/applications/qmc/looper/looper/measurement.h:491:49: error: expected a constant of type ‘int’, got ‘time_t’ In file included from /home/userxx/temporary/alps/applications/qmc/looper/loop_config.h:38:0, from /home/userxx/temporary/alps/applications/qmc/looper/loop_custom.C:26: /home/userxx/temporary/alps/applications/qmc/looper/looper/correlation.h:37:48: error: expected nested-name-specifier before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/correlation.h:37:48: error: expected ‘>’ before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/correlation.h:41:13: error: expected unqualified-id before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/correlation.h:136:60: error: ‘"16:54:59"’ is not a valid template argument for type ‘int’ because string literals can never be used in this context /home/userxx/temporary/alps/applications/qmc/looper/looper/correlation.h:136:61: error: ‘<declaration error>’ is not a template /home/userxx/temporary/alps/applications/qmc/looper/looper/correlation.h:139:60: error: ‘"16:54:59"’ is not a valid template argument for type ‘int’ because string literals can never be used in this context /home/userxx/temporary/alps/applications/qmc/looper/looper/correlation.h:139:61: error: ‘<declaration error>’ is not a template In file included from /home/userxx/temporary/alps/applications/qmc/looper/loop_config.h:39:0, from /home/userxx/temporary/alps/applications/qmc/looper/loop_custom.C:26: /home/userxx/temporary/alps/applications/qmc/looper/looper/custom.h:63:48: error: expected nested-name-specifier before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/custom.h:63:48: error: expected ‘>’ before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/custom.h:127:60: error: ‘"16:54:59"’ is not a valid template argument for type ‘int’ because string literals can never be used in this context /home/userxx/temporary/alps/applications/qmc/looper/looper/custom.h:127:61: error: ‘<declaration error>’ is not a template /home/userxx/temporary/alps/applications/qmc/looper/looper/custom.h:130:60: error: ‘"16:54:59"’ is not a valid template argument for type ‘int’ because string literals can never be used in this context /home/userxx/temporary/alps/applications/qmc/looper/looper/custom.h:130:61: error: ‘<declaration error>’ is not a template In file included from /home/userxx/temporary/alps/applications/qmc/looper/loop_config.h:40:0, from /home/userxx/temporary/alps/applications/qmc/looper/loop_custom.C:26: /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h:40:48: error: expected nested-name-specifier before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h:40:48: error: expected ‘>’ before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h:45:13: error: expected unqualified-id before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h:46:49: error: type/value mismatch at argument 3 in template parameter list for ‘template<unsigned int MAX_DIM> template<class MC, class LAT, int <anonymous> > struct looper::stiffness<MAX_DIM>::estimator’ /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h:46:49: error: expected a constant of type ‘int’, got ‘time_t’ /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h: In member function ‘void looper::stiffness<MAX_DIM>::estimator<MC, LAT, <anonymous> >::estimate::begin_bs(const looper::stiffness::estimator::estimator_t&, const lattice_t&, double, int, int, int)’: /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h:98:15: error: request for member ‘bond_vector_relative’ in ‘emt’, which is of non-class type ‘const looper::stiffness::estimator::estimator_t’ /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h:98:40: error: request for member ‘real_bond’ in ‘emt’, which is of non-class type ‘const looper::stiffness::estimator::estimator_t’ /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h:99:33: error: request for member ‘dim’ in ‘emt’, which is of non-class type ‘const looper::stiffness::estimator::estimator_t’ /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h: In member function ‘void looper::stiffness<MAX_DIM>::estimator<MC, LAT, <anonymous> >::estimate::end_bs(const looper::stiffness::estimator::estimator_t&, const lattice_t&, double, int, int, int)’: /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h:105:15: error: request for member ‘bond_vector_relative’ in ‘emt’, which is of non-class type ‘const looper::stiffness::estimator::estimator_t’ /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h:105:40: error: request for member ‘real_bond’ in ‘emt’, which is of non-class type ‘const looper::stiffness::estimator::estimator_t’ /home/userxx/temporary/alps/applications/qmc/looper/looper/stiffness.h:106:33: error: request for member ‘dim’ in ‘emt’, which is of non-class type ‘const looper::stiffness::estimator::estimator_t’ In file included from /home/userxx/temporary/alps/applications/qmc/looper/loop_config.h:41:0, from /home/userxx/temporary/alps/applications/qmc/looper/loop_custom.C:26: /home/userxx/temporary/alps/applications/qmc/looper/looper/susceptibility.h: At global scope: /home/userxx/temporary/alps/applications/qmc/looper/looper/susceptibility.h:37:48: error: expected nested-name-specifier before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/susceptibility.h:37:48: error: expected ‘>’ before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/susceptibility.h:41:13: error: expected unqualified-id before string constant /home/userxx/temporary/alps/applications/qmc/looper/looper/susceptibility.h:42:49: error: type/value mismatch at argument 3 in template parameter list for ‘template<class MC, class LAT, int <anonymous> > struct looper::susceptibility::estimator’ /home/userxx/temporary/alps/applications/qmc/looper/looper/susceptibility.h:42:49: error: expected a constant of type ‘int’, got ‘time_t’ /home/userxx/temporary/alps/applications/qmc/looper/looper/susceptibility.h: In member function ‘void looper::susceptibility::estimator<MC, LAT, <anonymous> >::estimate::end_s(const looper::susceptibility::estimator::estimator_t&, const lattice_t&, double, int, int)’: /home/userxx/temporary/alps/applications/qmc/looper/looper/susceptibility.h:128:25: error: request for member ‘gauge’ in ‘emt’, which is of non-class type ‘const looper::susceptibility::estimator::estimator_t’ /home/userxx/temporary/alps/applications/qmc/looper/looper/susceptibility.h: In member function ‘void looper::susceptibility::estimator<MC, LAT, <anonymous> >::estimate::start_bottom(const looper::susceptibility::estimator::estimator_t&, const lattice_t&, double, int, int)’: /home/userxx/temporary/alps/applications/qmc/looper/looper/susceptibility.h:140:25: error: request for member ‘gauge’ in ‘emt’, which is of non-class type ‘const looper::susceptibility::estimator::estimator_t’ make[2]: *** [applications/qmc/looper/CMakeFiles/loop.dir/loop_custom.C.o] Error 1 make[2]: Leaving directory `/home/userxx/temporary/alpsbuilt' make[1]: *** [applications/qmc/looper/CMakeFiles/loop.dir/all] Error 2 make[1]: Leaving directory `/home/userxx/temporary/alpsbuilt' make: *** [all] Error 2

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Dzyaloshinsky-Moriya interaction
by kaveh edalat 19 Apr '11

19 Apr '11

Dear All It is possible to add Dzyaloshinsky- Moriya (DM) interaction to Heisenberg model to do classical Monte Carlo (in 3D lattice)? Best regards Kaveh

1 0

Re: [ALPS-users] about printgraph
by 孙照宇 16 Apr '11

16 Apr '11

Dear Rui: As I know, a .xml file would be the output file, rather than the input file, of the command "printgraph". Suppose you have the following parameter file (such as "parm1a" in ED-01): ---------------------------------------------- MODEL="spin" LATTICE="chain lattice" CONSERVED_QUANTUMNUMBERS="Sz" MEASURE_STRUCTURE_FACTOR[Structure Factor Sz]=Sz MEASURE_CORRELATIONS[Diagonal spin correlations]=Sz MEASURE_CORRELATIONS[Offdiagonal spin correlations]="Splus:Sminus" local_S=1 J=1 {L=4;} ---------------------------------------------- If you want to check its grapha, you first need to edit the above file into the following form： ---------------------TOBECHECKED------------------------- MODEL="spin" LATTICE="chain lattice" L=4 ---------------------------------------------------------------------- which is saved as a file "_tobechecked_". Then you can run the following command: printgraph _tobechecked_ And you would get a .xml file describing the grapha of the model. At present my computer is not at hand, thus I answer the question just with the help of my memory. And I hope I have not missed any important points. Good Luck sunzhaoyu2000(a)gmail.com 2011/4/15 <comp-phys-alps-users-request(a)lists.phys.ethz.ch>: > Send Comp-phys-alps-users mailing list submissions to > comp-phys-alps-users(a)lists.phys.ethz.ch > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.phys.ethz.ch/listinfo/comp-phys-alps-users > or, via email, send a message with subject or body 'help' to > comp-phys-alps-users-request(a)lists.phys.ethz.ch > > You can reach the person managing the list at > comp-phys-alps-users-owner(a)lists.phys.ethz.ch > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Comp-phys-alps-users digest..." > > > Today's Topics: > > 1. problems with "printgraph" or "lattice viewer" or "lattice > previewer" (zheng rui) > 2. boost_filesystem causes exception (Andreas Herrmann) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 14 Apr 2011 12:56:10 +0800 > From: zheng rui <rzhengphy(a)gmail.com> > Subject: [ALPS-users] problems with "printgraph" or "lattice viewer" > or "lattice previewer" > To: comp-phys-alps-users(a)lists.phys.ethz.ch > Message-ID: <BANLkTi=FTE4RZKNq0KL1wpL_uPh4SBtUKQ(a)mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Dear professors: > > Yesterday i tried many ways to print out the lattice graph from the xml > file, but still i cant make it. I install alps from synaptic of Ubuntu > Marverick 10.10. In the tutorials, it says "printgraph parameter_file" will > generate the graphy, so i made a xml file "temp.xml" like this: > > <LATTICES> > > <LATTICE name="square" dimension="2"> > <BASIS> > <VECTOR> 1 0 </VECTOR> > <VECTOR> 0 1 </VECTOR> > </BASIS> > </LATTICE> > > <FINITELATTICE name="rectangular periodic" dimension="2"> > <LATTICE ref="square"/> > <EXTENT dimension="1" size="5"/> > <EXTENT dimension="2" size="6"/> > <BOUNDARY type="periodic"/> > </FINITELATTICE> > > <UNITCELL name="complex example" dimension="2" vertices="2"> > <VERTEX id="1" type="0"><COORDINATE> 0.3 0.7 </COORDINATE></VERTEX> > <VERTEX id="2" type="1"><COORDINATE> 0.6 0.3 </COORDINATE></VERTEX> > <EDGE><SOURCE vertex="1"/><TARGET vertex="1" offset="1 0"/></EDGE> > <EDGE><SOURCE vertex="1"/><TARGET vertex="1" offset="0 1"/></EDGE> > <EDGE><SOURCE vertex="1"/><TARGET vertex="2"/></EDGE> > </UNITCELL> > > <LATTICEGRAPH> > <FINITELATTICE ref="rectangular periodic"/> > <UNITCELL ref="complex example"/> > </LATTICEGRAPH> > > </LATTICES> > > then i type "printgraph temp.xml", and it returns error: Caught exception: > parameter parse error at "<LATTICES> <LATTICE name="squa" > i also tried the parm1.in.xml and parm1.task.in.xml but got the same error > msg, i dont know how to make printgraph work normally, can anyone show me an > example? > > In this posting: > > https://lists.phys.ethz.ch/pipermail/comp-phys-alps-users/2009/000676.html > > someone had already asked exactly the same question, and i have installed > all the stuff as Synge Todo said, and it did show a 3 dimensional cone after > i type "wxVTKRenderWindowInteractorConeExample()" but after this i still > dont know how to move on. In the pdf > > http://alps.comp-phys.org/mediawiki/images/c/cb/Alps-gui.pdf > > Synge Todo had showed a simple gui of making lattice and parameters, i dont > know how to get the gui like that, i found the "preview.py. > lattice-preview.in, printgraph.c" files in the > "alps-2.0.0-r5363-src-with-boost/alps/tool/" documentary after i unzip the > alps-2.0.0-r5363-src-with-boost.tar.gz<http://alps.comp-phys.org/static/software/releases/alps-2.0.0-r5363-src-wit…>, > so i think there must be ways to print the lattice graph, i tried to > compile the "preview.py", but it says "no module named config", so i > download a config softpackage from this website: > > http://www.red-dove.com/config-doc/ > > and install the package so i could import config module in python, then i > try to compile preview.py again, it says config module has no attribute > version, i guess the config module in alps should be connected with the file > "config.py.in" in the tool documentary, but not the config softpackage i > download, but i dont know how to use the "config.py.in" file, so i get > stucked again. > > In another posting: > > https://lists.phys.ethz.ch/pipermail/comp-phys-alps-users/2007/000106.html > > someone also asked a similar question, and Matthias suggested " To visualize > it please use the lattice viewer that i send in a separate mail and > copy&paste above text into it ", so i wonder whether the lattice previewer > tool is only for private use, but those postings were years ago, i m > confused. > > Hope someone could tell me how to print out the lattice graph when i want to > make my own lattice. > > > Thanks and Best Wishes! > > Rui >

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problems with "printgraph" or "lattice viewer" or "lattice previewer"
by zheng rui 14 Apr '11

14 Apr '11

Dear professors: Yesterday i tried many ways to print out the lattice graph from the xml file, but still i cant make it. I install alps from synaptic of Ubuntu Marverick 10.10. In the tutorials, it says "printgraph parameter_file" will generate the graphy, so i made a xml file "temp.xml" like this: <LATTICES> <LATTICE name="square" dimension="2"> <BASIS> <VECTOR> 1 0 </VECTOR> <VECTOR> 0 1 </VECTOR> </BASIS> </LATTICE> <FINITELATTICE name="rectangular periodic" dimension="2"> <LATTICE ref="square"/> <EXTENT dimension="1" size="5"/> <EXTENT dimension="2" size="6"/> <BOUNDARY type="periodic"/> </FINITELATTICE> <UNITCELL name="complex example" dimension="2" vertices="2"> <VERTEX id="1" type="0"><COORDINATE> 0.3 0.7 </COORDINATE></VERTEX> <VERTEX id="2" type="1"><COORDINATE> 0.6 0.3 </COORDINATE></VERTEX> <EDGE><SOURCE vertex="1"/><TARGET vertex="1" offset="1 0"/></EDGE> <EDGE><SOURCE vertex="1"/><TARGET vertex="1" offset="0 1"/></EDGE> <EDGE><SOURCE vertex="1"/><TARGET vertex="2"/></EDGE> </UNITCELL> <LATTICEGRAPH> <FINITELATTICE ref="rectangular periodic"/> <UNITCELL ref="complex example"/> </LATTICEGRAPH> </LATTICES> then i type "printgraph temp.xml", and it returns error: Caught exception: parameter parse error at "<LATTICES> <LATTICE name="squa" i also tried the parm1.in.xml and parm1.task.in.xml but got the same error msg, i dont know how to make printgraph work normally, can anyone show me an example? In this posting: https://lists.phys.ethz.ch/pipermail/comp-phys-alps-users/2009/000676.html someone had already asked exactly the same question, and i have installed all the stuff as Synge Todo said, and it did show a 3 dimensional cone after i type "wxVTKRenderWindowInteractorConeExample()" but after this i still dont know how to move on. In the pdf http://alps.comp-phys.org/mediawiki/images/c/cb/Alps-gui.pdf Synge Todo had showed a simple gui of making lattice and parameters, i dont know how to get the gui like that, i found the "preview.py. lattice-preview.in, printgraph.c" files in the "alps-2.0.0-r5363-src-with-boost/alps/tool/" documentary after i unzip the alps-2.0.0-r5363-src-with-boost.tar.gz<http://alps.comp-phys.org/static/software/releases/alps-2.0.0-r5363-src-wit…>, so i think there must be ways to print the lattice graph, i tried to compile the "preview.py", but it says "no module named config", so i download a config softpackage from this website: http://www.red-dove.com/config-doc/ and install the package so i could import config module in python, then i try to compile preview.py again, it says config module has no attribute version, i guess the config module in alps should be connected with the file "config.py.in" in the tool documentary, but not the config softpackage i download, but i dont know how to use the "config.py.in" file, so i get stucked again. In another posting: https://lists.phys.ethz.ch/pipermail/comp-phys-alps-users/2007/000106.html someone also asked a similar question, and Matthias suggested " To visualize it please use the lattice viewer that i send in a separate mail and copy&paste above text into it ", so i wonder whether the lattice previewer tool is only for private use, but those postings were years ago, i m confused. Hope someone could tell me how to print out the lattice graph when i want to make my own lattice. Thanks and Best Wishes! Rui

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energy fluctuation
by muzi352 14 Apr '11

14 Apr '11

Dear ALPS developers： thank you for your reply, my question is that sweeps=20 and 30,the ground energy is unequal .I try it sever times . I think that the energy is converged in case.strangly ,for example : Jxy1-0.5,Jz1=-1.0,Jz2and Jxy2 vary ,the ground energy is:(sweeps=30,a=J2/Jz1) ,when a<0.4,the energy fluctuation. thank you At 2011-04-13，comp-phys-alps-users-request(a)lists.phys.ethz.ch wrote: >Send Comp-phys-alps-users mailing list submissions to > comp-phys-alps-users(a)lists.phys.ethz.ch > >To subscribe or unsubscribe via the World Wide Web, visit > https://lists.phys.ethz.ch/listinfo/comp-phys-alps-users >or, via email, send a message with subject or body 'help' to > comp-phys-alps-users-request(a)lists.phys.ethz.ch > >You can reach the person managing the list at > comp-phys-alps-users-owner(a)lists.phys.ethz.ch > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of Comp-phys-alps-users digest..." > > >Today's Topics: > > 1. Re: Comp-phys-alps-users Digest, Vol 61, Issue 2 ( sunzhaoyu2000 ) > 2. Re: Comp-phys-alps-users Digest, Vol 61, Issue 2 (???) > 3. Re: Comp-phys-alps-users Digest, Vol 61, Issue 2 (Matthias Troyer) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Tue, 12 Apr 2011 21:12:01 +0800 >From: " sunzhaoyu2000 " <sunzhaoyu2000(a)qq.com> >Subject: Re: [ALPS-users] Comp-phys-alps-users Digest, Vol 61, Issue 2 >To: " comp-phys-alps-users " <comp-phys-alps-users(a)lists.phys.ethz.ch> >Message-ID: <tencent_08AFFA496BBAE9F666EFF7C4(a)qq.com> >Content-Type: text/plain; charset="iso-8859-1" > >Dear Matthias: > >Thank you very much for your reply. > >This random result is obtained by my DMRG code rather than ALPS. > >Do you mean that as parts of the Hamiltonian (H), all terms should be converged ? >In fact, the term included in H is S1S2, thus S1S2=(SxSx+SySy+SzSz) acts as a whole in H. >What I find is that: SxSx, SySy and SzSz are random, >however, I think S1S2(=SxSx+SySy+SzSz) as a whole should have already be converged. >I will check whether or not S1S2 is converged and present the result as soon as possible. > >Thank you again ! > > > > >------------------ Original ------------------ >From: "comp-phys-alps-users-request"<comp-phys-alps-users-request(a)lists.phys.ethz.ch>; >Date: Tue, Apr 12, 2011 06:00 PM >To: "comp-phys-alps-users"<comp-phys-alps-users(a)lists.phys.ethz.ch>; > >Subject: Comp-phys-alps-users Digest, Vol 61, Issue 2 > > > Send Comp-phys-alps-users mailing list submissions to > comp-phys-alps-users(a)lists.phys.ethz.ch > >To subscribe or unsubscribe via the World Wide Web, visit > https://lists.phys.ethz.ch/listinfo/comp-phys-alps-users >or, via email, send a message with subject or body 'help' to > comp-phys-alps-users-request(a)lists.phys.ethz.ch > >You can reach the person managing the list at > comp-phys-alps-users-owner(a)lists.phys.ethz.ch > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of Comp-phys-alps-users digest..." > > >Today's Topics: > > 1. Would all the pairwise correlations be converged after the > gound-state energy converges ? (???) > 2. Re: Would all the pairwise correlations be converged after > the gound-state energy converges ? (Matthias Troyer) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Tue, 12 Apr 2011 09:40:50 +0800 >From: ??? <sunzhaoyu2000(a)gmail.com> >Subject: [ALPS-users] Would all the pairwise correlations be converged > after the gound-state energy converges ? >To: comp-phys-alps-users(a)lists.phys.ethz.ch >Message-ID: <BANLkTi=5kxfMAFzVhTNYK5i67CT=znarrQ(a)mail.gmail.com> >Content-Type: text/plain; charset=ISO-8859-1 > >Dear ALPS users and developers: > >I want to study a spin ladder with four-site interaction. >[ ? ?Phys. Rev. B 67, 100409(R) (2003), >http://prb.aps.org/abstract/PRB/v67/i10/e100409 ? ? ] > >As ALPS 2.0 do not support 4-site terms, I code DMRG myself. >For small size system(L=2,4,6,8,10) and the four-site interaction is zero, >I have checked my DMRG code by comparing the obtained ground-state >energy with that obtained by ED in ALPS. >The two are fairly consistent. > >Then I move on to larger systems and four-body term are included. >However, I am confused by the DMRG results: >in the staggered dimer state of the system(see Phys. Rev. B 67, >100409(R) (2003), Fig. 2), >when the ground-state of the ladder has converged, >I check the two-site correlations, and find that >the correlation function [ G_leg ] between nearest-neighboring two >sites on the leg converges very well, >meanwhile the correlation function [ G_rung ] between the two sites on >the same rung does not converge at all >( G_rung seems to be random with the increase of size L, L = 100 ). > >I wonder is this a reasonable result ( is it possible that G_rung >becomes undefined or because of some other physical reason, >leading to a random average value for G_rung ) ? >Or all the pairwise correlations in the system should always be >converged after the gound-state energy converges ? >Any suggestion would be appreciated. > >sunzhaoyu2000(a)gmail.com > > >------------------------------ > >Message: 2 >Date: Tue, 12 Apr 2011 06:58:27 +0200 >From: Matthias Troyer <troyer(a)phys.ethz.ch> >Subject: Re: [ALPS-users] Would all the pairwise correlations be > converged after the gound-state energy converges ? >To: comp-phys-alps-users(a)lists.phys.ethz.ch >Message-ID: <639622C3-988E-44CB-9E33-7329CC65A19F(a)phys.ethz.ch> >Content-Type: text/plain; charset=utf-8 > >Hi, > >was this random result obtained by ALPS or by your code? Could you please send us the input files if it was with ALPS? Since the rung correlation function is actually part of the Hamiltonian I don't think that the energy is converged in your case. > >Matthias > >On 12 Apr 2011, at 03:40, ??? wrote: > >> Dear ALPS users and developers: >> >> I want to study a spin ladder with four-site interaction. >> [ Phys. Rev. B 67, 100409(R) (2003), >> http://prb.aps.org/abstract/PRB/v67/i10/e100409 ] >> >> As ALPS 2.0 do not support 4-site terms, I code DMRG myself. >> For small size system(L=2,4,6,8,10) and the four-site interaction is zero, >> I have checked my DMRG code by comparing the obtained ground-state >> energy with that obtained by ED in ALPS. >> The two are fairly consistent. >> >> Then I move on to larger systems and four-body term are included. >> However, I am confused by the DMRG results: >> in the staggered dimer state of the system(see Phys. Rev. B 67, >> 100409(R) (2003), Fig. 2), >> when the ground-state of the ladder has converged, >> I check the two-site correlations, and find that >> the correlation function [ G_leg ] between nearest-neighboring two >> sites on the leg converges very well, >> meanwhile the correlation function [ G_rung ] between the two sites on >> the same rung does not converge at all >> ( G_rung seems to be random with the increase of size L, L = 100 ). >> >> I wonder is this a reasonable result ( is it possible that G_rung >> becomes undefined or because of some other physical reason, >> leading to a random average value for G_rung ) ? >> Or all the pairwise correlations in the system should always be >> converged after the gound-state energy converges ? >> Any suggestion would be appreciated. >> >> sunzhaoyu2000(a)gmail.com >> > > > >End of Comp-phys-alps-users Digest, Vol 61, Issue 2 >*************************************************** >

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