Hi Dear,
How I can change the code for measuring those two correlation functions?
Thanks, Zhian
On Thu, Apr 30, 2009 at 1:30 PM, comp-phys-alps-users-request@phys.ethz.chwrote:
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Today's Topics:
- Advanced correlation functions (zhian asadzadeh)
- Re: Advanced correlation functions (Ryo IGARASHI)
Message: 1 Date: Thu, 30 Apr 2009 10:29:31 +0330 From: zhian asadzadeh zhian.asadzadeh@gmail.com Subject: [ALPS-users] Advanced correlation functions To: comp-phys-alps-users@phys.ethz.ch Message-ID: 89e5d6760904292359qaa8200byc8414cd745a85ff1@mail.gmail.com Content-Type: text/plain; charset="iso-8859-1"
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@phys.ethz.chwrote:
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- Re: Advanced correlation functions (Justin David Peel)
Message: 1 Date: Tue, 28 Apr 2009 16:26:47 +0430 From: zhian asadzadeh zhian.asadzadeh@gmail.com Subject: [ALPS-users] Advanced correlation functions To: comp-phys-alps-users@phys.ethz.ch Message-ID: 89e5d6760904280456y43d0cd4cs665a08729a2cac1f@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@phys.ethz.chwrote:
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Today's Topics:
- Re: lapack support in ALPS (Synge Todo)
- Re: Advanced correlation functions (Justin David Peel)
- 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@comp-phys.org Subject: Re: [ALPS-users] lapack support in ALPS To: comp-phys-alps-users@phys.ethz.ch Message-ID: 04B17733-4F07-4867-8B22-4343337160BB@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@utah.edu Subject: Re: [ALPS-users] Advanced correlation functions To: "comp-phys-alps-users@phys.ethz.ch" comp-phys-alps-users@phys.ethz.ch Message-ID: <
3E5F591958142A40B693A5FC6672D4942624680106@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@phys.ethz.ch [ comp-phys-alps-users-bounces@phys.ethz.ch] On Behalf Of zhian
asadzadeh
[
zhian.asadzadeh@gmail.com] Sent: Sunday, April 26, 2009 1:54 AM To: Comp-phys-alps-users@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@utah.edu Subject: Re: [ALPS-users] Comp-phys-alps-users Digest, Vol 37, Issue 18 To: "comp-phys-alps-users@phys.ethz.ch" comp-phys-alps-users@phys.ethz.ch Message-ID: <
3E5F591958142A40B693A5FC6672D4942624680107@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@phys.ethz.ch [ comp-phys-alps-users-bounces@phys.ethz.ch] On Behalf Of Gang Chen [ chggst@physics.ucsb.edu] Sent: Saturday, April 25, 2009 9:55 AM To: comp-phys-alps-users@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
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Today's Topics:
- extract the ground state from DMRG or Exact diagonalization (Gang Chen)
- 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@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@phys.ethz.chmailto: comp-phys-alps-users@phys.ethz.ch Message-ID: <3924ab970904241457k17ab51b1tbd002d09ae7287e@mail.gmail.com
<mailto:
3924ab970904241457k17ab51b1tbd002d09ae7287e@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