Comp-phys-alps-users

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Re: [ALPS-users] BONDOPERATOR measurement question
by Sebastian Huber 22 Nov '11

22 Nov '11

Didn't help. I played a bit with operator names. But the fact that MEASURE_LOCAL does perform something made me believe that it is not the cure. Thanks for the quick answer, Sebastian -- Sebastian Huber Department of Condensed Matter Physics The Weizmann Institute of Science 76100 Rehovot Web: http://www.weizmann.ac.il/~huber Tel: +972 8 934 4258 On 22.11.2011, at 01:11, Matthias Troyer wrote: > Try not to use a minus (-) in the operator name, but instead an underscore or similar > > > On 22 Nov 2011, at 00:09, Sebastian Huber wrote: > >> Dear all, >> >> I have an inhomogeneous lattice problem and I try to measure a "local" bondoperator, e.g., the current over one bond only. I get the following error from the sparsediag application >> >> Did not parse to end of string '(one-bond)/4(i)' >> >> when I try to do a "MEASURE_AVERAGE". I get no error if I use "MEASURE_LOCAL". I am a bit puzzled that "MEASURE_LOCAL" does something all together as my operator contains more than one site, which is in violation to a condition on local measurements on the alps webpage. I paste a minimal (silly) set of configuration files which produces this error below. Help would be greatly appreciated. >> >> Sebastian >> >> lanczosconf: >> >> MODEL="simple"; >> LATTICE="2x2" >> LATTICE_LIBRARY="graph.xml" >> MODEL_LIBRARY="model.xml" >> COMPLEX=true; >> t=-1; >> Nup_total=1; >> Ndown_total=1; >> CONSERVED_QUANTUMNUMBERS="N,Sz"; >> NUMBER_EIGENVALUES=2; >> TRANSLATION_SYMMETRY=false; >> MEASURE_AVERAGE[one-bond]=one-bond; >> {U=1;} >> >> >> graph.xml: >> >> <LATTICES> >> >> <GRAPH name="2x2" dimension="2" vertices="4" edges="9"> >> <VERTEX id="1" type="0"><COORDINATE>0 0</COORDINATE></VERTEX> >> <VERTEX id="2" type="0"><COORDINATE>1 0</COORDINATE></VERTEX> >> <VERTEX id="3" type="0"><COORDINATE>0 1</COORDINATE></VERTEX> >> <VERTEX id="4" type="0"><COORDINATE>1 1</COORDINATE></VERTEX> >> <EDGE source="1" target="2" id="1" type="1" vector="1 0"/> >> <EDGE source="2" target="1" id="2" type="2" vector="1 0"/> >> <EDGE source="3" target="4" id="3" type="3" vector="1 0"/> >> <EDGE source="4" target="3" id="4" type="4" vector="1 0"/> >> <EDGE source="1" target="3" id="5" type="5" vector="0 1"/> >> <EDGE source="2" target="4" id="6" type="6" vector="0 1"/> >> <EDGE source="3" target="1" id="7" type="7" vector="0 1"/> >> <EDGE source="4" target="2" id="8" type="8" vector="0 1"/> >> <EDGE source="1" target="4" id="9" type="9" vector="1 1"/> >> </GRAPH> >> >> </LATTICES> >> >> >> model.xml >> >> <MODELS> >> <SITEBASIS name="fermion"> >> <QUANTUMNUMBER name="Nup" min="0" max="1" type="fermionic"/> >> <QUANTUMNUMBER name="Ndown" min="0" max="1" type="fermionic"/> >> <OPERATOR name="Splus" matrixelement="1/2"> >> <CHANGE quantumnumber="Nup" change="1"/> >> <CHANGE quantumnumber="Ndown" change="-1"/> >> </OPERATOR> >> <OPERATOR name="Sminus" matrixelement="1/2"> >> <CHANGE quantumnumber="Nup" change="-1"/> >> <CHANGE quantumnumber="Ndown" change="+1"/> >> </OPERATOR> >> <OPERATOR name="Sz" matrixelement="(Nup-Ndown)/2"/> >> <OPERATOR name="Nup" matrixelement="Nup"/> >> <OPERATOR name="Ndown" matrixelement="Ndown"/> >> <OPERATOR name="c_down" matrixelement="1"> >> <CHANGE quantumnumber="Ndown" change="-1"/> >> </OPERATOR> >> <OPERATOR name="cdag_down" matrixelement="1"> >> <CHANGE quantumnumber="Ndown" change="1"/> >> </OPERATOR> >> <OPERATOR name="c_up" matrixelement="1"> >> <CHANGE quantumnumber="Nup" change="-1"/> >> </OPERATOR> >> <OPERATOR name="cdag_up" matrixelement="1"> >> <CHANGE quantumnumber="Nup" change="1"/> >> </OPERATOR> >> <OPERATOR name="n" matrixelement="Nup+Ndown"/> >> <OPERATOR name="n_up" matrixelement="Nup"/> >> <OPERATOR name="n_down" matrixelement="Ndown"/> >> </SITEBASIS> >> >> <BASIS name="fermion"> >> <SITEBASIS ref="fermion"/> >> <CONSTRAINT quantumnumber="Nup" value="Nup_total"/> >> <CONSTRAINT quantumnumber="Ndown" value="Ndown_total"/> >> </BASIS> >> >> <BONDOPERATOR name="one-bond" source="1" target="2"> >> I*(cdag_up(1)*c_up(2)-cdag_up(2)*c_up(1)) >> </BONDOPERATOR> >> >> <HAMILTONIAN name="simple"> >> <PARAMETER name="U" default="1"/> >> <BASIS ref="fermion"/> >> <SITETERM site="i"> >> U*n_up(i)*n_down(i) >> </SITETERM> >> </HAMILTONIAN> >> >> </MODELS> >> >> -- >> Sebastian Huber >> Department of Condensed Matter Physics >> The Weizmann Institute of Science >> 76100 Rehovot >> >> Web: http://www.weizmann.ac.il/~huber >> Tel: +972 8 934 4258 >> >

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BONDOPERATOR measurement question
by Sebastian Huber 22 Nov '11

22 Nov '11

Dear all, I have an inhomogeneous lattice problem and I try to measure a "local" bondoperator, e.g., the current over one bond only. I get the following error from the sparsediag application Did not parse to end of string '(one-bond)/4(i)' when I try to do a "MEASURE_AVERAGE". I get no error if I use "MEASURE_LOCAL". I am a bit puzzled that "MEASURE_LOCAL" does something all together as my operator contains more than one site, which is in violation to a condition on local measurements on the alps webpage. I paste a minimal (silly) set of configuration files which produces this error below. Help would be greatly appreciated. Sebastian lanczosconf: MODEL="simple"; LATTICE="2x2" LATTICE_LIBRARY="graph.xml" MODEL_LIBRARY="model.xml" COMPLEX=true; t=-1; Nup_total=1; Ndown_total=1; CONSERVED_QUANTUMNUMBERS="N,Sz"; NUMBER_EIGENVALUES=2; TRANSLATION_SYMMETRY=false; MEASURE_AVERAGE[one-bond]=one-bond; {U=1;} graph.xml: <LATTICES> <GRAPH name="2x2" dimension="2" vertices="4" edges="9"> <VERTEX id="1" type="0"><COORDINATE>0 0</COORDINATE></VERTEX> <VERTEX id="2" type="0"><COORDINATE>1 0</COORDINATE></VERTEX> <VERTEX id="3" type="0"><COORDINATE>0 1</COORDINATE></VERTEX> <VERTEX id="4" type="0"><COORDINATE>1 1</COORDINATE></VERTEX> <EDGE source="1" target="2" id="1" type="1" vector="1 0"/> <EDGE source="2" target="1" id="2" type="2" vector="1 0"/> <EDGE source="3" target="4" id="3" type="3" vector="1 0"/> <EDGE source="4" target="3" id="4" type="4" vector="1 0"/> <EDGE source="1" target="3" id="5" type="5" vector="0 1"/> <EDGE source="2" target="4" id="6" type="6" vector="0 1"/> <EDGE source="3" target="1" id="7" type="7" vector="0 1"/> <EDGE source="4" target="2" id="8" type="8" vector="0 1"/> <EDGE source="1" target="4" id="9" type="9" vector="1 1"/> </GRAPH> </LATTICES> model.xml <MODELS> <SITEBASIS name="fermion"> <QUANTUMNUMBER name="Nup" min="0" max="1" type="fermionic"/> <QUANTUMNUMBER name="Ndown" min="0" max="1" type="fermionic"/> <OPERATOR name="Splus" matrixelement="1/2"> <CHANGE quantumnumber="Nup" change="1"/> <CHANGE quantumnumber="Ndown" change="-1"/> </OPERATOR> <OPERATOR name="Sminus" matrixelement="1/2"> <CHANGE quantumnumber="Nup" change="-1"/> <CHANGE quantumnumber="Ndown" change="+1"/> </OPERATOR> <OPERATOR name="Sz" matrixelement="(Nup-Ndown)/2"/> <OPERATOR name="Nup" matrixelement="Nup"/> <OPERATOR name="Ndown" matrixelement="Ndown"/> <OPERATOR name="c_down" matrixelement="1"> <CHANGE quantumnumber="Ndown" change="-1"/> </OPERATOR> <OPERATOR name="cdag_down" matrixelement="1"> <CHANGE quantumnumber="Ndown" change="1"/> </OPERATOR> <OPERATOR name="c_up" matrixelement="1"> <CHANGE quantumnumber="Nup" change="-1"/> </OPERATOR> <OPERATOR name="cdag_up" matrixelement="1"> <CHANGE quantumnumber="Nup" change="1"/> </OPERATOR> <OPERATOR name="n" matrixelement="Nup+Ndown"/> <OPERATOR name="n_up" matrixelement="Nup"/> <OPERATOR name="n_down" matrixelement="Ndown"/> </SITEBASIS> <BASIS name="fermion"> <SITEBASIS ref="fermion"/> <CONSTRAINT quantumnumber="Nup" value="Nup_total"/> <CONSTRAINT quantumnumber="Ndown" value="Ndown_total"/> </BASIS> <BONDOPERATOR name="one-bond" source="1" target="2"> I*(cdag_up(1)*c_up(2)-cdag_up(2)*c_up(1)) </BONDOPERATOR> <HAMILTONIAN name="simple"> <PARAMETER name="U" default="1"/> <BASIS ref="fermion"/> <SITETERM site="i"> U*n_up(i)*n_down(i) </SITETERM> </HAMILTONIAN> </MODELS> -- Sebastian Huber Department of Condensed Matter Physics The Weizmann Institute of Science 76100 Rehovot Web: http://www.weizmann.ac.il/~huber Tel: +972 8 934 4258

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Vector average
by Michal Maik 21 Nov '11

21 Nov '11

Hi all I was wondering how can I extract a single part of a vector average, for example a single value from the Structure Factor. I am looking along the lines of how would I write the xml file to get the results out. Below I have a simple plot file for Magnetization. How could I change it to get out one part of a vector average, such as from the structure factor? <?xml version="1.0" encoding="UTF-8"?> <plot name="Magnetization Density"> <legend show="true"/> <xaxis label="chemical potential" type="PARAMETER" name="mu"/> <yaxis label="Magnetization Density" type="SCALAR_AVERAGE"/> <set label="2D triangular lattice"/> </plot> In advance thank you for the help. Best Regards Michal Maik

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Re: [ALPS-users] Fwd: alps 2.0.2 - failed tests
by Mateusz Łącki 20 Nov '11

20 Nov '11

I am using gcc version 4.6.1 20110908 (Red Hat 4.6.1-9) (GCC) for c++ and ifort for fortran Version 12.0.0 (trief gfortran before but i got errors that some hdf5 modules are not gfortran compatible) Regards, Mateusz >This all seems to boil down to one issue "Illegal term in expression", a runtime error in the parser. Which compiler are >you using? > >Matthias

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Re: [ALPS-users] alps 2.0.2 - compile error
by Mateusz Łącki 20 Nov '11

20 Nov '11

I attach the requested file (i changed the name) Regards Mateusz Lacki

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alps 2.0.2 - compile error
by Mateusz Łącki 19 Nov '11

19 Nov '11

Dear All, I am trying to compile the newest alps release. I managed to get up to 62% of the compilation (on two machines - one running Fedora, the other ubuntu 10.04) up to exactly the same stage: Scanning dependencies of target jacobidavidson2 [ 62%] Building CXX object example/ietl/CMakeFiles/jacobidavidson2.dir/jacobidavidson2.cpp.o In file included from /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/boost/numeric/bindings/lapack/computational.hpp:39:0, from /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/ietl/jd.h:51, from /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/example/ietl/jacobidavidson2.cpp:52: /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/boost/numeric/bindings/lapack/computational/getrs.hpp: In static member function ‘static std::ptrdiff_t boost::numeric::bindings::lapack::getrs_impl<Value>::invoke(const MatrixA&, const VectorIPIV&, MatrixB&) [with MatrixA = boost::numeric::ublas::matrix<double, boost::numeric::ublas::basic_column_major<>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >, VectorIPIV = std::vector<int>, MatrixB = boost::numeric::ublas::vector<double>, Value = double, std::ptrdiff_t = long int]’: /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/boost/numeric/bindings/lapack/computational/getrs.hpp:247:51: instantiated from ‘std::ptrdiff_t boost::numeric::bindings::lapack::getrs(const MatrixA&, const VectorIPIV&, MatrixB&) [with MatrixA = boost::numeric::ublas::matrix<double, boost::numeric::ublas::basic_column_major<>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >, VectorIPIV = std::vector<int>, MatrixB = boost::numeric::ublas::vector<double>, std::ptrdiff_t = long int]’ /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/ietl/jd.h:313:9: instantiated from ‘void ietl::solver::left_prec_solver<SOLV, MATRIX, VS, PREC>::operator()(ietl::solver::left_prec_solver<SOLV, MATRIX, VS, PREC>::real_type, ietl::solver::left_prec_solver<SOLV, MATRIX, VS, PREC>::vector_type&, ietl::solver::left_prec_solver<SOLV, MATRIX, VS, PREC>::vector_type&, IT&) [with IT = ietl::jd_iteration<double>, SOLV = ietl::gmres_wrapper, MATRIX = boost::numeric::ublas::symmetric_matrix<double, boost::numeric::ublas::basic_lower<> >, VS = ietl::vectorspace<boost::numeric::ublas::vector<double> >, PREC = jacobi_prec<boost::numeric::ublas::symmetric_matrix<double, boost::numeric::ublas::basic_lower<> >, double>, ietl::solver::left_prec_solver<SOLV, MATRIX, VS, PREC>::real_type = double, ietl::solver::left_prec_solver<SOLV, MATRIX, VS, PREC>::vector_type = boost::numeric::ublas::vector<double>]’ /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/ietl/jd.h:633:13: instantiated from ‘void ietl::jd<MATRIX, VS>::jdqr(SOLVER&, IT&, GEN&, ietl::jd<MATRIX, VS>::size_type, bool) [with SOLVER = ietl::solver::left_prec_solver<ietl::gmres_wrapper, boost::numeric::ublas::symmetric_matrix<double, boost::numeric::ublas::basic_lower<> >, ietl::vectorspace<boost::numeric::ublas::vector<double> >, jacobi_prec<boost::numeric::ublas::symmetric_matrix<double, boost::numeric::ublas::basic_lower<> >, double> >, IT = ietl::jd_iteration<double>, GEN = boost::random::lagged_fibonacci_01_engine<double, 48, 44497u, 21034u>, MATRIX = boost::numeric::ublas::symmetric_matrix<double, boost::numeric::ublas::basic_lower<> >, VS = ietl::vectorspace<boost::numeric::ublas::vector<double> >, ietl::jd<MATRIX, VS>::size_type = long unsigned int]’ /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/ietl/jd.h:403:17: instantiated from ‘void ietl::jd<MATRIX, VS>::eigensystem(IT&, GEN&, ietl::jd<MATRIX, VS>::size_type, PREC&, SOLV, bool) [with SOLV = ietl::gmres_wrapper, IT = ietl::jd_iteration<double>, GEN = boost::random::lagged_fibonacci_01_engine<double, 48, 44497u, 21034u>, PREC = jacobi_prec<boost::numeric::ublas::symmetric_matrix<double, boost::numeric::ublas::basic_lower<> >, double>, MATRIX = boost::numeric::ublas::symmetric_matrix<double, boost::numeric::ublas::basic_lower<> >, VS = ietl::vectorspace<boost::numeric::ublas::vector<double> >, ietl::jd<MATRIX, VS>::size_type = long unsigned int]’ /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/example/ietl/jacobidavidson2.cpp:136:54: instantiated from here /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/boost/numeric/bindings/lapack/computational/getrs.hpp:225:69: error: no matching function for call to ‘getrs(order, trans, boost::numeric::bindings::result_of::size_row_op<const boost::numeric::ublas::matrix<double, boost::numeric::ublas::basic_column_major<>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >, boost::numeric::bindings::tag::no_transpose>::type, boost::numeric::bindings::result_of::size_column<boost::numeric::ublas::vector<double> >::type, boost::numeric::bindings::result_of::begin_value<const boost::numeric::ublas::matrix<double, boost::numeric::ublas::basic_column_major<>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >::type, boost::numeric::bindings::result_of::stride_major<const boost::numeric::ublas::matrix<double, boost::numeric::ublas::basic_column_major<>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >::type, boost::numeric::bindings::result_of::begin_value<const std::vector<int> >::type, boost::numeric::bindings::result_of::begin_value<boost::numeric::ublas::vector<double> >::type, boost::numeric::bindings::result_of::stride_major<boost::numeric::ublas::vector<double> >::type)’ /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/boost/numeric/bindings/lapack/computational/getrs.hpp:225:69: note: candidates are: /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/boost/numeric/bindings/lapack/computational/getrs.hpp:120:23: note: template<class Order, class Trans> std::ptrdiff_t boost::numeric::bindings::lapack::detail::getrs(Order, Trans, fortran_int_t, fortran_int_t, const float*, fortran_int_t, const fortran_int_t*, float*, fortran_int_t) /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/boost/numeric/bindings/lapack/computational/getrs.hpp:136:23: note: template<class Order, class Trans> std::ptrdiff_t boost::numeric::bindings::lapack::detail::getrs(Order, Trans, fortran_int_t, fortran_int_t, const double*, fortran_int_t, const fortran_int_t*, double*, fortran_int_t) /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/boost/numeric/bindings/lapack/computational/getrs.hpp:152:23: note: template<class Order, class Trans> std::ptrdiff_t boost::numeric::bindings::lapack::detail::getrs(Order, Trans, fortran_int_t, fortran_int_t, const std::complex<float>*, fortran_int_t, const fortran_int_t*, std::complex<float>*, fortran_int_t) /home/stefan/alps/alps-2.0.2-r5790-src-with-boost/alps/src/boost/numeric/bindings/lapack/computational/getrs.hpp:169:23: note: template<class Order, class Trans> std::ptrdiff_t boost::numeric::bindings::lapack::detail::getrs(Order, Trans, fortran_int_t, fortran_int_t, const std::complex<double>*, fortran_int_t, const fortran_int_t*, std::complex<double>*, fortran_int_t) make[2]: *** [example/ietl/CMakeFiles/jacobidavidson2.dir/jacobidavidson2.cpp.o] Error 1 make[1]: *** [example/ietl/CMakeFiles/jacobidavidson2.dir/all] Error 2 it looks like a typical compile error. Am I doing something wrong? Is it missing dependency? I did not do anything nonstandard - I followed instructions from the webpage. Regards, Mateusz Lacki

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Re: [ALPS-users] Comp-phys-alps-users Digest, Vol 68, Issue 2
by A. Giovanni Ramirez Garcia 18 Nov '11

18 Nov '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello all, I'm following the tutorial to build a bond operator, then checking the models library (in the liveALPS version) I found this <BONDOPERATOR name="biquadratic" source="x" target="y"> (exchange_xy(i,j)+Sz(i)*Sz(j))*(exchange_xy(i,j)+Sz(i)*Sz(j)) </BONDOPERATOR> Now my question: Should we change the source/target pair from "x,y" to be "i,j" since we use "i,j" in the definition? Thanks Giovanni Ramirez Instituto de Física Teórica UAM/CSICt On Sun, 13 Nov 2011, comp-phys-alps-users-request(a)lists.phys.ethz.ch wrote: > Date: Sun, 13 Nov 2011 12:00:06 +0100 > From: comp-phys-alps-users-request(a)lists.phys.ethz.ch > Reply-To: comp-phys-alps-users(a)lists.phys.ethz.ch > To: comp-phys-alps-users(a)lists.phys.ethz.ch > Subject: Comp-phys-alps-users Digest, Vol 68, 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. Re: running alps programs using python (Matthias Troyer) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 12 Nov 2011 12:20:21 +0100 > From: Matthias Troyer <troyer(a)phys.ethz.ch> > To: comp-phys-alps-users(a)lists.phys.ethz.ch > Subject: Re: [ALPS-users] running alps programs using python > Message-ID: <9D43033D-EE01-4806-84D5-F403CC7B229F(a)phys.ethz.ch> > Content-Type: text/plain; charset=utf-8 > > Hi Tadeusz, > > Thank you very much. I fixed it now > > Matthias > > On 11 Nov 2011, at 21:10, Tadeusz Wasiuty?ski wrote: > >> In tutorial on the web page 'running alps programs using python' line: >> print convertToText(plotdata) >> and the next two lines should read: >> print pyalps.plot.convertToText(plotdata) >> just like it is in the file tutorial-text.py >> Best regards >> Tadeusz > > > > End of Comp-phys-alps-users Digest, Vol 68, Issue 2 > *************************************************** > -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) iEUEARECAAYFAk7Gd1cACgkQRDNhYOBIzlhVYwCggG/8AtMMC05N9fLC36IKiQ2I BA4AmM900hSprK/kNu6AueGjHM1clQA= =DmFV -----END PGP SIGNATURE-----

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running alps programs using python
by Tadeusz Wasiutyński 12 Nov '11

12 Nov '11

In tutorial on the web page 'running alps programs using python' line: print convertToText(plotdata) and the next two lines should read: print pyalps.plot.convertToText(plotdata) just like it is in the file tutorial-text.py Best regards Tadeusz

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(no subject)
by Stone, Matthew B. 11 Nov '11

11 Nov '11

I am using ALPS to examine the excitations, temperature and magnetic field dependence of a coupled dimer system. I would like to use the fulldiag code. Are there ways to implement the use of multiprocessors for this code? currently I am using the commands input_file=pyalps.writeInputFiles('parm', parms) res = pylaps.runApplication('fulldiag', input_file) data = pyalps.evaluateFulldiagVersusT(pyalps.getResultFiles(prefix='parm'),Delta_T=1.0, T_min=1.0, T_max=51) as described in the tutorial pages. Thank you, Matthew B. Stone Neutron Scattering Science Division Oak Ridge National Laboratory PO box 2008 MS6475 Oak Ridge, TN 37831-6475 Phone: 1-865-202-6898 Fax: 1-865-574-6080

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ALPS2.0 problem about the usage of CPU
by 潘丽华 24 Oct '11

24 Oct '11

Dear all, I've installed ALPS2.0 on a 12-core Linux Server Computer. When running programs using DMRG, one program usually uses more than one CPU, e.g., even 390% CPU. I'd like to know if there're some places we should pay attention to in the installation or the using process. I doubt whether the ALPS2.0 version has applied the Parallel Programming Algorithm. Does the usage of 390% CPU mean the speeding up of the computation? What I have to do if I'd like one DMRG program uses just one CPU? Yours sincerely, L. H. Pan

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