April 2009 - Comp-phys-alps-users

Advanced correlation functions
by zhian asadzadeh 31 May '09

31 May '09

Hi Dear, Please let me know can I change the code for measuring just two kinds of correlations? (Correlation of first site with other sites and the middle site with other sites). Thanks. On Wed, Apr 29, 2009 at 1:30 PM, <comp-phys-alps-users-request(a)phys.ethz.ch>wrote: > Send Comp-phys-alps-users mailing list submissions to > comp-phys-alps-users(a)phys.ethz.ch > > To subscribe or unsubscribe via the World Wide Web, visit > https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users > or, via email, send a message with subject or body 'help' to > comp-phys-alps-users-request(a)phys.ethz.ch > > You can reach the person managing the list at > comp-phys-alps-users-owner(a)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. Advanced correlation functions (zhian asadzadeh) > 2. Re: Advanced correlation functions (Justin David Peel) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 28 Apr 2009 16:26:47 +0430 > From: zhian asadzadeh <zhian.asadzadeh(a)gmail.com> > Subject: [ALPS-users] Advanced correlation functions > To: comp-phys-alps-users(a)phys.ethz.ch > Message-ID: > <89e5d6760904280456y43d0cd4cs665a08729a2cac1f(a)mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Hi Dear, > > Thank you for your guidance, but the mentioned definition for Sy doesn't > work. > And for the first question, how I can change the code for measuring those > two kind of correlations? I mean the correlation of first site with others > and middle site with others too. > > Thanks, > Zhian. > > > > > On Tue, Apr 28, 2009 at 2:30 PM, > <comp-phys-alps-users-request(a)phys.ethz.ch>wrote: > > > Send Comp-phys-alps-users mailing list submissions to > > comp-phys-alps-users(a)phys.ethz.ch > > > > To subscribe or unsubscribe via the World Wide Web, visit > > > https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users > > or, via email, send a message with subject or body 'help' to > > comp-phys-alps-users-request(a)phys.ethz.ch > > > > You can reach the person managing the list at > > comp-phys-alps-users-owner(a)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: lapack support in ALPS (Synge Todo) > > 2. Re: Advanced correlation functions (Justin David Peel) > > 3. Re: Comp-phys-alps-users Digest, Vol 37, Issue 18 > > (Justin David Peel) > > > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Mon, 27 Apr 2009 19:51:14 +0900 > > From: Synge Todo <wistaria(a)comp-phys.org> > > Subject: Re: [ALPS-users] lapack support in ALPS > > To: comp-phys-alps-users(a)phys.ethz.ch > > Message-ID: <04B17733-4F07-4867-8B22-4343337160BB(a)comp-phys.org> > > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes > > > > Dear Fu-Jiun Jiang, > > > > On 2009/04/23, at 23:39, Fu-Jiun Jiang ITP wrote: > > > When install the ALPS with lapack being supported, what command > > > should be used? In the instruction, it is said > > > --with-lapack-dir=/path/to/my/lapack/ --with-lapack="-l my_lapack". > > > Is it true that first one should point to where the lapack library is. > > > How about the second one? Thanks. > > > > In many cases, lapack installation will be found automatically without > > any options. If this is not the case, please your > > system administrator about the linker options to link your program > > against lapack. For example, if you are linking > > liblapack.a and libblas.a in /path/to/my/lapack, then the configure > > options should be > > > > --with-lapack-dir=/path/to/my/lapack --with-lapack="-llapack -lblas" > > > > Synge > > > > > > > > ------------------------------ > > > > Message: 2 > > Date: Mon, 27 Apr 2009 11:35:24 -0600 > > From: Justin David Peel <justin.peel(a)utah.edu> > > Subject: Re: [ALPS-users] Advanced correlation functions > > To: "comp-phys-alps-users(a)phys.ethz.ch" > > <comp-phys-alps-users(a)phys.ethz.ch> > > Message-ID: > > < > 3E5F591958142A40B693A5FC6672D4942624680106(a)C8V1.xds.umail.utah.edu > > > > > Content-Type: text/plain; charset="us-ascii" > > > > I'm not sure about only measuring those two correlations (you might have > to > > change the code for that), but, as to your last question, you should be > able > > to use Sx:Sx because the Sx operator is defined in the models.xml file in > > terms of the raising and lowering operators. If you want to measure Sy, > you > > would have to add the following lines to the models.xml file: > > > > <SITEOPERATOR name="Sy" site="x"> > > 1/2*(Splus(x)-Sminus(x)) > > </SITEOPERATOR> > > > > because it hasn't been defined as far as I can tell. > > > > Good luck, > > Justin > > ________________________________________ > > From: comp-phys-alps-users-bounces(a)phys.ethz.ch [ > > comp-phys-alps-users-bounces(a)phys.ethz.ch] On Behalf Of zhian asadzadeh > [ > > zhian.asadzadeh(a)gmail.com] > > Sent: Sunday, April 26, 2009 1:54 AM > > To: Comp-phys-alps-users(a)phys.ethz.ch > > Subject: [ALPS-users] Advanced correlation functions > > > > Hi All, > > > > I am using DMRG for my problem and I am going to measure diagonal and > > offdiagonal correlation functions. > > I am interest to obtain the correlation of first site with other sites > and > > the middle site with other sites too. > > The output of DMRG consist of all the combinations which are possible > but > > I just want the two correlations mentioned above because the output will > be > > very large ( I am studying the ferrimagnetic chain with 100 sites). > > can I do that? how? > > And also can I use Sx:Sx for measuring off diagonal correlation > functions? > > > > Thanks, > > Zhian. > > > > > > > > ------------------------------ > > > > Message: 3 > > Date: Mon, 27 Apr 2009 11:42:56 -0600 > > From: Justin David Peel <justin.peel(a)utah.edu> > > Subject: Re: [ALPS-users] Comp-phys-alps-users Digest, Vol 37, Issue > > 18 > > To: "comp-phys-alps-users(a)phys.ethz.ch" > > <comp-phys-alps-users(a)phys.ethz.ch> > > Message-ID: > > < > 3E5F591958142A40B693A5FC6672D4942624680107(a)C8V1.xds.umail.utah.edu > > > > > Content-Type: text/plain; charset="us-ascii" > > > > Someone correct me if I'm wrong, but I believe this isn't very directly > > feasible. The ground state vector from the exact ground state will be in > a > > different basis and have a different length than the ground state vector > > from DMRG (it's a truncated basis after all). > > ________________________________________ > > From: comp-phys-alps-users-bounces(a)phys.ethz.ch [ > > comp-phys-alps-users-bounces(a)phys.ethz.ch] On Behalf Of Gang Chen [ > > chggst(a)physics.ucsb.edu] > > Sent: Saturday, April 25, 2009 9:55 AM > > To: comp-phys-alps-users(a)phys.ethz.ch > > Subject: Re: [ALPS-users] Comp-phys-alps-users Digest, Vol 37, Issue 18 > > > > Thanks, I want to compute the overlap between the exact ground state > > and the state I generated from other method. > > > > best, > > Gang > > > > On Sat, Apr 25, 2009 at 3:00 AM, < > > comp-phys-alps-users-request(a)phys.ethz.ch<mailto: > > comp-phys-alps-users-request(a)phys.ethz.ch>> wrote: > > Send Comp-phys-alps-users mailing list submissions to > > comp-phys-alps-users(a)phys.ethz.ch<mailto: > > comp-phys-alps-users(a)phys.ethz.ch> > > > > To subscribe or unsubscribe via the World Wide Web, visit > > https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users > > or, via email, send a message with subject or body 'help' to > > comp-phys-alps-users-request(a)phys.ethz.ch<mailto: > > comp-phys-alps-users-request(a)phys.ethz.ch> > > > > You can reach the person managing the list at > > comp-phys-alps-users-owner(a)phys.ethz.ch<mailto: > > comp-phys-alps-users-owner(a)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. extract the ground state from DMRG or Exact diagonalization > > (Gang Chen) > > 2. Re: extract the ground state from DMRG or Exact > > diagonalization (Justin David Peel) > > > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Fri, 24 Apr 2009 14:57:02 -0700 > > From: Gang Chen <chggst(a)physics.ucsb.edu<mailto:chggst@physics.ucsb.edu > >> > > Subject: [ALPS-users] extract the ground state from DMRG or Exact > > diagonalization > > To: comp-phys-alps-users(a)phys.ethz.ch<mailto: > > comp-phys-alps-users(a)phys.ethz.ch> > > Message-ID: > > <3924ab970904241457k17ab51b1tbd002d09ae7287e(a)mail.gmail.com > <mailto: > > 3924ab970904241457k17ab51b1tbd002d09ae7287e(a)mail.gmail.com>> > > Content-Type: text/plain; charset="iso-8859-1" > > > > Hi All, > > > > If I use DMRG or Exact diagonalization to find the ground state of my > > Hamiltonian. How can > > I extract the ground state vector (the numerical vector) from my results? > > > > best, > > > > -- > > GANG CHEN > > Department of Physics > > University of California > > Santa Barbara, CA 93106 > > Office: Broida 6216 > > Phone: 805-893-5260 > > Fax: 805-893-3378 > >

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Advanced correlation functions
by zhian asadzadeh 31 May '09

31 May '09

Hi Dear, Thank you for your guidance, but the mentioned definition for Sy doesn't work. And for the first question, how I can change the code for measuring those two kind of correlations? I mean the correlation of first site with others and middle site with others too. Thanks, Zhian. On Tue, Apr 28, 2009 at 2:30 PM, <comp-phys-alps-users-request(a)phys.ethz.ch>wrote: > Send Comp-phys-alps-users mailing list submissions to > comp-phys-alps-users(a)phys.ethz.ch > > To subscribe or unsubscribe via the World Wide Web, visit > https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users > or, via email, send a message with subject or body 'help' to > comp-phys-alps-users-request(a)phys.ethz.ch > > You can reach the person managing the list at > comp-phys-alps-users-owner(a)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: lapack support in ALPS (Synge Todo) > 2. Re: Advanced correlation functions (Justin David Peel) > 3. Re: Comp-phys-alps-users Digest, Vol 37, Issue 18 > (Justin David Peel) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 27 Apr 2009 19:51:14 +0900 > From: Synge Todo <wistaria(a)comp-phys.org> > Subject: Re: [ALPS-users] lapack support in ALPS > To: comp-phys-alps-users(a)phys.ethz.ch > Message-ID: <04B17733-4F07-4867-8B22-4343337160BB(a)comp-phys.org> > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes > > Dear Fu-Jiun Jiang, > > On 2009/04/23, at 23:39, Fu-Jiun Jiang ITP wrote: > > When install the ALPS with lapack being supported, what command > > should be used? In the instruction, it is said > > --with-lapack-dir=/path/to/my/lapack/ --with-lapack="-l my_lapack". > > Is it true that first one should point to where the lapack library is. > > How about the second one? Thanks. > > In many cases, lapack installation will be found automatically without > any options. If this is not the case, please your > system administrator about the linker options to link your program > against lapack. For example, if you are linking > liblapack.a and libblas.a in /path/to/my/lapack, then the configure > options should be > > --with-lapack-dir=/path/to/my/lapack --with-lapack="-llapack -lblas" > > Synge > > > > ------------------------------ > > Message: 2 > Date: Mon, 27 Apr 2009 11:35:24 -0600 > From: Justin David Peel <justin.peel(a)utah.edu> > Subject: Re: [ALPS-users] Advanced correlation functions > To: "comp-phys-alps-users(a)phys.ethz.ch" > <comp-phys-alps-users(a)phys.ethz.ch> > Message-ID: > <3E5F591958142A40B693A5FC6672D4942624680106(a)C8V1.xds.umail.utah.edu > > > Content-Type: text/plain; charset="us-ascii" > > I'm not sure about only measuring those two correlations (you might have to > change the code for that), but, as to your last question, you should be able > to use Sx:Sx because the Sx operator is defined in the models.xml file in > terms of the raising and lowering operators. If you want to measure Sy, you > would have to add the following lines to the models.xml file: > > <SITEOPERATOR name="Sy" site="x"> > 1/2*(Splus(x)-Sminus(x)) > </SITEOPERATOR> > > because it hasn't been defined as far as I can tell. > > Good luck, > Justin > ________________________________________ > From: comp-phys-alps-users-bounces(a)phys.ethz.ch [ > comp-phys-alps-users-bounces(a)phys.ethz.ch] On Behalf Of zhian asadzadeh [ > zhian.asadzadeh(a)gmail.com] > Sent: Sunday, April 26, 2009 1:54 AM > To: Comp-phys-alps-users(a)phys.ethz.ch > Subject: [ALPS-users] Advanced correlation functions > > Hi All, > > I am using DMRG for my problem and I am going to measure diagonal and > offdiagonal correlation functions. > I am interest to obtain the correlation of first site with other sites and > the middle site with other sites too. > The output of DMRG consist of all the combinations which are possible but > I just want the two correlations mentioned above because the output will be > very large ( I am studying the ferrimagnetic chain with 100 sites). > can I do that? how? > And also can I use Sx:Sx for measuring off diagonal correlation functions? > > Thanks, > Zhian. > > > > ------------------------------ > > Message: 3 > Date: Mon, 27 Apr 2009 11:42:56 -0600 > From: Justin David Peel <justin.peel(a)utah.edu> > Subject: Re: [ALPS-users] Comp-phys-alps-users Digest, Vol 37, Issue > 18 > To: "comp-phys-alps-users(a)phys.ethz.ch" > <comp-phys-alps-users(a)phys.ethz.ch> > Message-ID: > <3E5F591958142A40B693A5FC6672D4942624680107(a)C8V1.xds.umail.utah.edu > > > Content-Type: text/plain; charset="us-ascii" > > Someone correct me if I'm wrong, but I believe this isn't very directly > feasible. The ground state vector from the exact ground state will be in a > different basis and have a different length than the ground state vector > from DMRG (it's a truncated basis after all). > ________________________________________ > From: comp-phys-alps-users-bounces(a)phys.ethz.ch [ > comp-phys-alps-users-bounces(a)phys.ethz.ch] On Behalf Of Gang Chen [ > chggst(a)physics.ucsb.edu] > Sent: Saturday, April 25, 2009 9:55 AM > To: comp-phys-alps-users(a)phys.ethz.ch > Subject: Re: [ALPS-users] Comp-phys-alps-users Digest, Vol 37, Issue 18 > > Thanks, I want to compute the overlap between the exact ground state > and the state I generated from other method. > > best, > Gang > > On Sat, Apr 25, 2009 at 3:00 AM, < > comp-phys-alps-users-request(a)phys.ethz.ch<mailto: > comp-phys-alps-users-request(a)phys.ethz.ch>> wrote: > Send Comp-phys-alps-users mailing list submissions to > comp-phys-alps-users(a)phys.ethz.ch<mailto: > comp-phys-alps-users(a)phys.ethz.ch> > > To subscribe or unsubscribe via the World Wide Web, visit > https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users > or, via email, send a message with subject or body 'help' to > comp-phys-alps-users-request(a)phys.ethz.ch<mailto: > comp-phys-alps-users-request(a)phys.ethz.ch> > > You can reach the person managing the list at > comp-phys-alps-users-owner(a)phys.ethz.ch<mailto: > comp-phys-alps-users-owner(a)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. extract the ground state from DMRG or Exact diagonalization > (Gang Chen) > 2. Re: extract the ground state from DMRG or Exact > diagonalization (Justin David Peel) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 24 Apr 2009 14:57:02 -0700 > From: Gang Chen <chggst(a)physics.ucsb.edu<mailto:chggst@physics.ucsb.edu>> > Subject: [ALPS-users] extract the ground state from DMRG or Exact > diagonalization > To: comp-phys-alps-users(a)phys.ethz.ch<mailto: > comp-phys-alps-users(a)phys.ethz.ch> > Message-ID: > <3924ab970904241457k17ab51b1tbd002d09ae7287e(a)mail.gmail.com<mailto: > 3924ab970904241457k17ab51b1tbd002d09ae7287e(a)mail.gmail.com>> > Content-Type: text/plain; charset="iso-8859-1" > > Hi All, > > If I use DMRG or Exact diagonalization to find the ground state of my > Hamiltonian. How can > I extract the ground state vector (the numerical vector) from my results? > > best, > > -- > GANG CHEN > Department of Physics > University of California > Santa Barbara, CA 93106 > Office: Broida 6216 > Phone: 805-893-5260 > Fax: 805-893-3378 >

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current correlation function for fermionic hubbard model
by khalid hassan 30 May '09

30 May '09

Can alps can calculate the current correlation function for the fermionic hubbard model model for say two site. I have been using alps to calculate cahrge coorelation function the charge correlation function is < n_i n_j > = < c_i^+ c_i c_i^+ c_i > where as the current correlation function is < j_i j_j > = < c_i^+ c_j c_k^+ c_l > see the changing indexes. If it is possible then send me the program statement Best regards Khalid Loane

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Kondo lattice in ALPS
by Fu-Jiun Jiang ITP 20 May '09

20 May '09

Hello all, I got 2 questions for the Kondo lattice in the ALPS. The Hamiltonian in the models.xml for Kondo lattice reads -t*fermion_hop(i,j) + J*exchange(i,j) 1. Does the code only work at half-filling? 2. The second term in the Hamiltonian does not look like the original one, namely, the original Hamiltonian of the Kondo model contains a term \sum_{i} s_i \cdot S_i, here the s (S) are the spin of the conducting (local) electrons. I wonder what's going on. Thank you very much for your attention. Sincerely, Fu-Jiun

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problem with DMRG of ALPS
by Gang Chen 13 May '09

13 May '09

Hi all, I installed alps-1.3.4 with the latest boost 1.38 on my local Laptop. All the functions (e.g classical MC, fulldiag) all work fine except DMRG. When I try to run dmrg parm file in the tutorial, the job got aborted right after it started. Has anyone had similar problem with DMRG? best, -- GANG CHEN Department of Physics University of California Santa Barbara, CA 93106 Office: Broida 6216 Phone: 805-893-5260 Fax: 805-893-3378

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ground state wave functions by alps
by khalid hassan 30 Apr '09

30 Apr '09

dear alps team alps gives the energies correlation functions etc. I want to know is it gives the wavefunction of lowest ground state or any other states. because I calculated the ground state wavefunction for simple system e.g 2 site fermion hubbard half filling. Now I want to check it. If alps do not tell the wavefunction then there is any other way that I find it using alps. best regards khalid Loane

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Re: [ALPS-users] Comp-phys-alps-users Digest, Vol 37, Issue 18
by Gang Chen 27 Apr '09

27 Apr '09

Thanks, I want to compute the overlap between the exact ground state and the state I generated from other method. best, Gang On Sat, Apr 25, 2009 at 3:00 AM, <comp-phys-alps-users-request(a)phys.ethz.ch>wrote: > Send Comp-phys-alps-users mailing list submissions to > comp-phys-alps-users(a)phys.ethz.ch > > To subscribe or unsubscribe via the World Wide Web, visit > https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users > or, via email, send a message with subject or body 'help' to > comp-phys-alps-users-request(a)phys.ethz.ch > > You can reach the person managing the list at > comp-phys-alps-users-owner(a)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. extract the ground state from DMRG or Exact diagonalization > (Gang Chen) > 2. Re: extract the ground state from DMRG or Exact > diagonalization (Justin David Peel) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 24 Apr 2009 14:57:02 -0700 > From: Gang Chen <chggst(a)physics.ucsb.edu> > Subject: [ALPS-users] extract the ground state from DMRG or Exact > diagonalization > To: comp-phys-alps-users(a)phys.ethz.ch > Message-ID: > <3924ab970904241457k17ab51b1tbd002d09ae7287e(a)mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Hi All, > > If I use DMRG or Exact diagonalization to find the ground state of my > Hamiltonian. How can > I extract the ground state vector (the numerical vector) from my results? > > best, > > -- > GANG CHEN > Department of Physics > University of California > Santa Barbara, CA 93106 > Office: Broida 6216 > Phone: 805-893-5260 > Fax: 805-893-3378 >

2 1

Advanced correlation functions
by zhian asadzadeh 27 Apr '09

27 Apr '09

Hi All, I am using DMRG for my problem and I am going to measure diagonal and offdiagonal correlation functions. I am interest to obtain the correlation of first site with other sites and the middle site with other sites too. The output of DMRG consist of all the combinations which are possible but I just want the two correlations mentioned above because the output will be very large ( I am studying the ferrimagnetic chain with 100 sites). can I do that? how? And also can I use Sx:Sx for measuring off diagonal correlation functions? Thanks, Zhian.

2 1

lapack support in ALPS
by Fu-Jiun Jiang ITP 27 Apr '09

27 Apr '09

Hello all When install the ALPS with lapack being supported, what command should be used? In the instruction, it is said --with-lapack-dir=/path/to/my/lapack/ --with-lapack="-l my_lapack". Is it true that first one should point to where the lapack library is. How about the second one? Thanks. FJ

2 1

extract the ground state from DMRG or Exact diagonalization
by Gang Chen 25 Apr '09

25 Apr '09

Hi All, If I use DMRG or Exact diagonalization to find the ground state of my Hamiltonian. How can I extract the ground state vector (the numerical vector) from my results? best, -- GANG CHEN Department of Physics University of California Santa Barbara, CA 93106 Office: Broida 6216 Phone: 805-893-5260 Fax: 805-893-3378

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