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

calculate density distribution in finite temperature using "fulldiag"
by Chen Ahai 12 Feb '12

12 Feb '12

Dear all ALPS users I want to calculate the density distribution of hubbard model with external potential in finite temperature using the "fulldiag" command, the main parameters are ------------------------------------------------------------------------ ......... t=1.0 CONSERVED_QUANTUMNUMBERS="Sz,Nup,Ndown,N" MEASURE_LOCAL[n_density]=n MEASURE_LOCAL[n_up]=n_up MEASURE_LOCAL[n_down]=n_down {T=1.0} {T=10.0} ------------------------------------------------------------------------ It can get different thermodynamic quantities (e.g. free energy, specific heat) in different T, but the quantities I defined above keep the same in the two tasks. I can't find the problem in this test. Any help would be appreciated.... Thanks. Chen Ahai Department of Physics, Zhejiang Normal University Jinhua, Zhejiang Province, 321004, China e-mail: chenahaiphysics(a)gmail.com; chenahai(a)yahoo.cn

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(no subject)
by #ABDUL MALEK BIN RAZALI# 07 Feb '12

07 Feb '12

Hi, I'm currently doing a project involving honeycomb lattice involving nearest and next nearest neighbour interaction. How do i go about modifying the lattice ? Regards

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Re: [ALPS-users] S-Squared operator
by Stone, Matthew B. 04 Feb '12

04 Feb '12

Matthias, et al., Could you please post how to code this for one, two, three and four spins? From there I should be able to extend it out to N spins. I'll likely be working with N<=16. Thanks, Matt Stone >For many spins you need to code each number of spins separately, but it gets ugly pretty soon. > >Matthias > >>On 24 Jan 2012, at 19:36, Stone, Matthew B. wrote: >> >> Has anyone written an ALPS operator for the operator S^2 for a general number of spins in a system? >> >> For example, I would like to list the Sztotal and S^2 values for different energy levels calculated. >> >> The S^2 operator can be written as >> S^2 = (S_1 + S_2 + S_3 +?)^2 >> where S_1, S_2, etc. are the vector operators. >> >> for two spins one can write this as >> S^2 = (S_1 + S_2)^2 >> = (S_1)^2 + (S_2)^2 + 2 S_1 \dot S_2 >> = s(s+1) + s(s+1) + 2S_{1z}S_{2z} + S_{1+}S_{2-} + S_{1-}S_{2+} >> >> But I don?t see how to generalize this for a system of many spins >> using the ALPS ?spin? sitebasis and basis in order to have this operator value listed in the output calculations. >> >> Any help would be appreciated. >> Thanks, >> >> 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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Re: [ALPS-users] errors: installing ALPS 2.0.3 on Ubuntu 11.10
by Jin Xu 01 Feb '12

01 Feb '12

CMake Error at cmake_install.cmake:54 (FILE): file cannot create directory: /usr/bin/vistrails/packages. Maybe need administrative privileges. Oh, by the way, do I have to install Vistrails if I just wanna use python? On Wed, Feb 1, 2012 at 6:34 PM, Matthias Troyer <troyer(a)phys.ethz.ch> wrote: > > On Feb 1, 2012, at 3:45 AM, Jin Xu wrote: > > *Hello Matthias, > > Thanks for your reply. > > 1. After "./test/fixed_capacity/test_* > *vector" > terminate called after throwing an instance of 'std::logic_error' > what(): non_pod > Aborted > * > > > Synge, is that a known problem? > > * > 2. I did try "sudo make install" but the errors were still there. > * > > > which errors? > > * > 3. Since I am not so experienced in Linux, I don't quite understand " add > the ALPS installation to your path". Could you tell me more detailed > technical things?* > > > Just type > > export PATH=/opt/alps/bin:$PATH > > or call the ALPS programs with the /opt/alps/bin prefix, > e.g. /opt/alps/bin/dmrg > > Matthias > > > > On Wed, Feb 1, 2012 at 6:13 AM, Matthias Troyer <troyer(a)phys.ethz.ch>wrote: > >> Hi Jin Xu, >> >> >> On 31 Jan 2012, at 16:35, Jin Xu wrote: >> >> Dear Madam/Sir, >> >> I am a senior undergraduate student from Department of Physics, Zhejiang >> University, China. >> >> I've been trying many times to install ALPS 2.0.3 on my Ubuntu 11.10 >> Desktop but I failed. I will appreciate if you could help me fix the >> problems so that I can use python to run ALPS. >> >> 7. After make test, there come some errors: >> 98% tests passed, 2 tests failed out of 99 >> >> Total Test time (real) = 16.81 sec >> >> The following tests FAILED: >> 23 - test_vector (Failed) >> 40 - lattice_constant_test (Failed) >> >> >> The lattice_constant_test can be ignored, but please run the test_vector >> executable (./test/fixed_capacity/test_vector from the build directory) and >> send us the output. >> >> >> Errors while running CTest >> make: *** [test] Error 8 >> >> >> >> 8. After make install, there are also some errors: >> CMake Error at cmake_install.cmake:54 (FILE): >> file cannot create directory: /usr/bin/vistrails/packages. Maybe need >> administrative privileges. >> >> >> Yes, you need to use >> >> sudo make install >> >> >> 9. Now I still cannot run ALPS on my laptop (dmft-02-hybridization): >> alpspython tutorial2a.py >> alpspython: command not found >> >> >> You need to add the ALPS installation to your path. >> >> >> python tutorial2a.py >> Traceback (most recent call last): >> File "tutorial2a.py", line 27, in <module> >> import pyalps >> ImportError: No module named pyalps >> >> >> You need to use either alpspython, or install pyalps into your system >> python directory. >> >> >> dmft hybrid.param >> No command 'dmft' found, did you mean: >> Command 'mft' from package 'texlive-binaries' (main) >> dmft: command not found >> >> >> You need to add the ALPS installation to your path. >> >> >> >> >> Best regards >> >> Matthias Troyer >> >> > > > -- > *Jin Xu* > > *Undergraduate Student* > > *Department of Physics, Zhejiang University, Hangzhou, 310027, China* > > *Email: jin.xu(a)ualberta.ca* > > *Skype Handle: trivial19891016* > > > -- *Jin Xu* *Undergraduate Student* *Department of Physics, Zhejiang University, Hangzhou, 310027, China* *Email: jin.xu(a)ualberta.ca* *Skype Handle: trivial19891016*

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Re: [ALPS-users] errors: installing ALPS 2.0.3 on Ubuntu 11.10
by Jin Xu 01 Feb '12

01 Feb '12

*Hello Matthias, Thanks for your reply. 1. After "./test/fixed_capacity/test_* *vector" terminate called after throwing an instance of 'std::logic_error' what(): non_pod Aborted 2. I did try "sudo make install" but the errors were still there. 3. Since I am not so experienced in Linux, I don't quite understand " add the ALPS installation to your path". Could you tell me more detailed technical things?* On Wed, Feb 1, 2012 at 6:13 AM, Matthias Troyer <troyer(a)phys.ethz.ch> wrote: > Hi Jin Xu, > > > On 31 Jan 2012, at 16:35, Jin Xu wrote: > > Dear Madam/Sir, > > I am a senior undergraduate student from Department of Physics, Zhejiang > University, China. > > I've been trying many times to install ALPS 2.0.3 on my Ubuntu 11.10 > Desktop but I failed. I will appreciate if you could help me fix the > problems so that I can use python to run ALPS. > > 7. After make test, there come some errors: > 98% tests passed, 2 tests failed out of 99 > > Total Test time (real) = 16.81 sec > > The following tests FAILED: > 23 - test_vector (Failed) > 40 - lattice_constant_test (Failed) > > > The lattice_constant_test can be ignored, but please run the test_vector > executable (./test/fixed_capacity/test_vector from the build directory) and > send us the output. > > > Errors while running CTest > make: *** [test] Error 8 > > > > 8. After make install, there are also some errors: > CMake Error at cmake_install.cmake:54 (FILE): > file cannot create directory: /usr/bin/vistrails/packages. Maybe need > administrative privileges. > > > Yes, you need to use > > sudo make install > > > 9. Now I still cannot run ALPS on my laptop (dmft-02-hybridization): > alpspython tutorial2a.py > alpspython: command not found > > > You need to add the ALPS installation to your path. > > > python tutorial2a.py > Traceback (most recent call last): > File "tutorial2a.py", line 27, in <module> > import pyalps > ImportError: No module named pyalps > > > You need to use either alpspython, or install pyalps into your system > python directory. > > > dmft hybrid.param > No command 'dmft' found, did you mean: > Command 'mft' from package 'texlive-binaries' (main) > dmft: command not found > > > You need to add the ALPS installation to your path. > > > > > Best regards > > Matthias Troyer > > -- *Jin Xu* *Undergraduate Student* *Department of Physics, Zhejiang University, Hangzhou, 310027, China* *Email: jin.xu(a)ualberta.ca* *Skype Handle: trivial19891016*

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Fwd: [Pitp-cmt] Summer School on "New trends in computational approaches for many-body systems"
by Matthias Troyer 31 Jan '12

31 Jan '12

Begin forwarded message: > From: "Swarn Rai" <pitpoffice(a)phas.ubc.ca> > Subject: [Pitp-cmt] Summer School on "New trends in computational approaches for many-body systems" > Date: 11 January 2012 19:42:14 CET > To: <pitp-cmt(a)phas.ubc.ca> > > Dear Colleague, > > We would appreciate if you could bring to the attention of your PhD > students, the following Summer School on "New trends in computational > approaches for many-body systems" > <http://pitp.phas.ubc.ca/confs/sherbrooke2012/index.html> > http://pitp.phas.ubc.ca/confs/sherbrooke2012/index.html It follows the > pedagogical model of a successful school held in 2008 on a similar topic. > > Approaches based on both model Hamiltonians and ab initio methods will be > treated. Many of the numerical methods that will be discussed in this School > are still in development, or so recent that one may expect dramatic > improvements and breakthroughs in the near future. Projected Entangled > States and Multi-scale Entanglement Renormalization Ansatz, Worm algorithms > and Quantum Cluster Methods are prime examples. This methodology is > essential for treating cold atoms, pnictides, heavy fermions, > high-Temperature Superconductivity, interfaces of complex oxides and many > more problems. > > Hands-on training on Abinit ( <http://www.abinit.org/> > http://www.abinit.org/ ) and ALPS ( <http://alps.comp-phys.org/> > http://alps.comp-phys.org/ ) codes will be an integral part of the School. > > There is no registration fee. Room and board for two weeks ranges from > $1,000 CND to $1,400$ CND ($1_CND ~$1USD). Financial support is available > for exceptional students that cannot be supported by research grants. > > Students can obtain the equivalent of a 3 credit graduate course (45 h) from > Sherbrooke University. It can applied to their degree at their home > institution if transfer of credit is allowed. > > Best regards, > > The organizing committee: > > André-Marie Tremblay (Sherbrooke) > Massimo Boninsegni (Alberta) > Michel Côté (Montreal) > Roger Melko (Waterloo) > David Sénéchal ((Sherbrooke) > Matthias Troyer (ETH) > Guifre Vidal (Perimeter) > > > _______________________________________________ > Pitp-cmt mailing list > Pitp-cmt(a)phas.ubc.ca > http://mailman.phas.ubc.ca/mailman/listinfo/pitp-cmt

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spin-1 with effective magnetic field at edges
by Javad Vahedi 31 Jan '12

31 Jan '12

Dear M. Troyer Thanks for your immediate comments, I have prepared the following input file, but I am not very sure that it is correct or not. I would be grateful If you check and find my mistakes. ######################################### LATTICE_LIBRARY="my_lattices.xml" LATTICE="open chain lattice with especial edges 32" MODEL="spin" local_S=1 SWEEPS=6 MAXSTATES=40 Jz=-1 Jxy=0 %h0=boundary field h0=0.5 Gamma=1 D=1 NUMBER_EIGENVALUES=2 MEASURE_AVERAGE[Magnetization]=Sz MEASURE_LOCAL[Local magnetization]=Sz %h1=bulk field { h1=0 } { h1=0.1 } { h1=0.2 } { h1=0 .3} { h1=0 4} { h1=0.5} ... %and so on ###################################### -- Best Regards Javad Vahedi, Dept. of Physics, Sari Branch of Islamic Azad University, P.O.Box 48164-194, Sari, Iran. Tel: (+98) 911 1554504 Fax: (+98)151 2256679 E-mail: javahedi(a)gmail.com javahedi(a)iausari.ac.ir

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errors: installing ALPS 2.0.3 on Ubuntu 11.10
by Jin Xu 31 Jan '12

31 Jan '12

Dear Madam/Sir, I am a senior undergraduate student from Department of Physics, Zhejiang University, China. I've been trying many times to install ALPS 2.0.3 on my Ubuntu 11.10 Desktop but I failed. I will appreciate if you could help me fix the problems so that I can use python to run ALPS. The installation steps and the errors are listed below: 1. I used Ubuntu Software Center to install the dependent libraries and tools: cmake-curses-gui libboost-all-dev libhdf5-serial-dev libfftw3-dev gfortran python-matplotlib python-scipy python-h5py liblapack-dev python-qt4-gl python-qt4-sql python-vtk 2. I downloaded the Vistrails (Debian package) <http://pkgs.org/debian-wheezy/debian-main-amd64/vistrails_2.0.alpha%7E1-2_a…>and installed it. 3. I downloaded the source package (with boost) and untared it in the directory ~/Downloads. I also created a directory named build in ~/Downloads then cd /build 4. I executed: cmake -D Boost_ROOT_DIR:PATH=~/Downloads/alps-2.0.3-src-with-boost/boost ~/Downloads/alps-2.0.3-src-with-boost/alps 5. I turned ALPS_INSTALL_VISTRAILS_PACKAGES on in the file CMakeCache.txt 6. I excuted: make 7. After make test, there come some errors: 98% tests passed, 2 tests failed out of 99 Total Test time (real) = 16.81 sec The following tests FAILED: 23 - test_vector (Failed) 40 - lattice_constant_test (Failed) Errors while running CTest make: *** [test] Error 8 8. After make install, there are also some errors: CMake Error at cmake_install.cmake:54 (FILE): file cannot create directory: /usr/bin/vistrails/packages. Maybe need administrative privileges. 9. Now I still cannot run ALPS on my laptop (dmft-02-hybridization): alpspython tutorial2a.py alpspython: command not found python tutorial2a.py Traceback (most recent call last): File "tutorial2a.py", line 27, in <module> import pyalps ImportError: No module named pyalps dmft hybrid.param No command 'dmft' found, did you mean: Command 'mft' from package 'texlive-binaries' (main) dmft: command not found Cheers, Jin -- *Jin Xu* *Undergraduate Student* *Department of Physics, Zhejiang University, Hangzhou, 310027, China* *Email: jin.xu(a)ualberta.ca* *Skype Handle: trivial19891016*

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spin-1 with effective magnetic field at edges
by Javad Vahedi 30 Jan '12

30 Jan '12

Dear all ALPS users I am going to run a DMRG simulation on the following one dimensional spin-1 Hamiltonian with open boundary conditions, but with effective magnetic field at both edges : H=-\sum_{j}^{N-1}S^z_{j}S^z_{j}S^z_{j+1} + D\sum_{j}^{N}(S^z_{j})^2 - h\sum_{j}^{N}S^z_{j} -B\sum_{j}^{N}S^x_{j} + h_{eff}(S_1+S_N), Indeed in the absence of the effective magnetic field the procedure is straightforward, but I don't see how to modified the lattice or any other requirements to go further Any help would be appreciated. Thanks, Javad Vahedi, Dept. of Physics, Sari Branch of Islamic Azad University, P.O.Box 48164-194, Sari, Iran. Tel: (+98) 911 1554504 Fax: (+98)151 2256679 E-mail: javahedi(a)gmail.com javahedi(a)iausari.ac.ir

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DMRG to Heisenberg Chain with Periodic Boundary Conditiion
by 潘丽华 28 Jan '12

28 Jan '12

Dear Matthias or all users community, I am wondering if the ALPS DMRG code in the version 1.3.2 can be applied to quasi-one dimensional Heisenberg chain with Periodic Boundary condition. Best Regards For You! Sincerely, Lihua Pan

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