I tested your file after modifying this line. It works
On 07/02/2017 09:01, Julien wrote:
Hi,
there is a little problem in your python script; have a look to the line where you include the xml file for the models.
Julien
DESPRES Julien Ph.D. student
Center for Theoretical Physics Quantum Matter Theory team Ecole Polytechnique 91128 Palaiseau Cedex France, EU Office : 00.10.06 (ground floor) Phone : +33 1 64 33 42 81
Laboratoire Charles Fabry Atom Optics group Institut d'Optique Graduate School 2 Avenue Augustin Fresnel 91127 Palaiseau Cedex France, EU Office : R2.29 (1st floor) Phone: +33 1 64 53 33 49 __________________________________
On 07/02/2017 04:24, Robertson Esperanza wrote:
I tried to print the result of taking the local measurement for n_i^2 but it only shows x = [0], y = [0], instead of x = [0 1 2 3 4 5 6 7 8 9], y = [10 scalar values] (since i'm using a 10-site open chain). I attached my python script and mymodels.xml. Thank you for the help.
On Mon, Feb 6, 2017 at 4:29 PM, Julien <julien.despres@institutoptique.fr mailto:julien.despres@institutoptique.fr> wrote:
Hi, you can do it in this way but in your parameter file you have to write : model['MODEL_LIBRARY'] = 'my_own_models.xml' or you can put it wherever you want but in this case : model['MODEL_LIBRARY'] = 'path_to_the_xml_file' Julien On 06/02/2017 09:21, Robertson Esperanza wrote:When creating a new model file, is it necessary that the new model file be saved on the same folder of the default models.xml file? On Mon, Feb 6, 2017 at 3:55 PM, Michele Dolfi <dolfim@phys.ethz.ch> wrote: MEASURE_AVERAGE is compute the average among all sites, i.e. a scalar value. MEASURE_LOCAL returns a list of measurements on all sites. Best, Michele -- ETH Zurich Dr.Michele Dolfi Institute for Theoretical Physics HIT G 32.4 Wolfgang-Pauli-Str. 27 8093 Zurich Switzerland dolfim@phys.ethz.ch <mailto:dolfim@phys.ethz.ch> www.itp.phys.ethz.ch <http://www.itp.phys.ethz.ch> +41 44 633 78 56 <tel:+41%2044%20633%2078%2056> phone +41 44 633 11 15 <tel:+41%2044%20633%2011%2015> faxOn 6 Feb 2017, at 08:50, Robertson Esperanza <robbie.esperanza@gmail.com> wrote: Oh, I forgot to mention that I'm using mps_optim application. How does the result of MEASURE_AVERAGE differ from MEASURE_LOCAL, if let's say I use "n" for these parameters? Thanks On Mon, Feb 6, 2017 at 3:08 PM, Michele Dolfi <dolfim@phys.ethz.ch> wrote: Hello, Could you please be a bit more specific about the application you are running? You are right about the local measurement, but you need MEASURE_LOCAL, since you want to value at each site. Since the n_i^2 operator is not yet defined in the model library, you need to add it yourself. Basically I would do as follow: 1. Copy the file models.xml from ALPS_ROOT/lib/xml/models.xml, where ALPS_ROOT is the root location of your alps installation. 2. Add this definition to your local copy, it defines the n^2 operator <SITEOPERATOR name=“n_squared" site="x"> n(x)*n(x) </SITEOPERATOR> 3. In your input parameters you have now to link to your new model file. MODEL_LIBRARY=“path/to/models.xml” 4. And add your measurement MEASURE_LOCAL[Density^2] = “ n_squared" Hope this helps. Best, Michele -- ETH Zurich Dr.Michele Dolfi Institute for Theoretical Physics HIT G 32.4 Wolfgang-Pauli-Str. 27 8093 Zurich Switzerland dolfim@phys.ethz.ch www.itp.phys.ethz.ch +41 44 633 78 56 <tel:+41%2044%20633%2078%2056> phone +41 44 633 11 15 <tel:+41%2044%20633%2011%2015> faxOn 6 Feb 2017, at 07:26, Robertson Esperanza <robbie.esperanza@gmail.com> wrote: Hello, I only started studying many-body physics, so there might be gaps in my knowledge. When using the MEASURE_CORRELATION, why does the measurement goes for only site i<j, is it because there will be "blowing up"? Alternatively, to measure for i=j, i think I could use MEASURE_AVERAGE, of let's say (n_i)^2 where n - n_up + n_down. How could I define such measurement, where you use an operator successively? Thank you for replying Robertson Esperanza ---- Comp-phys-alps-users Mailing List for the ALPS Project http://alps.comp-phys.org/ List info: https://lists.phys.ethz.ch//listinfo/comp-phys-alps-users Archive: https://lists.phys.ethz.ch//pipermail/comp-phys-alps-users Unsubscribe by writing a mail to comp-phys-alps-users-leave@lists.phys.ethz.ch <mailto:comp-phys-alps-users-leave@lists.phys.ethz.ch>.---- Comp-phys-alps-users Mailing List for the ALPS Project http://alps.comp-phys.org/ List info: https://lists.phys.ethz.ch//listinfo/comp-phys-alps-users Archive: https://lists.phys.ethz.ch//pipermail/comp-phys-alps-users Unsubscribe by writing a mail to comp-phys-alps-users-leave@lists.phys.ethz.ch <mailto:comp-phys-alps-users-leave@lists.phys.ethz.ch>. ---- Comp-phys-alps-users Mailing List for the ALPS Project http://alps.comp-phys.org/ List info: https://lists.phys.ethz.ch//listinfo/comp-phys-alps-users Archive: https://lists.phys.ethz.ch//pipermail/comp-phys-alps-users Unsubscribe by writing a mail to comp-phys-alps-users-leave@lists.phys.ethz.ch <mailto:comp-phys-alps-users-leave@lists.phys.ethz.ch>.---- Comp-phys-alps-users Mailing List for the ALPS Project http://alps.comp-phys.org/ List info: https://lists.phys.ethz.ch//listinfo/comp-phys-alps-users <https://lists.phys.ethz.ch//listinfo/comp-phys-alps-users> Archive: https://lists.phys.ethz.ch//pipermail/comp-phys-alps-users <https://lists.phys.ethz.ch//pipermail/comp-phys-alps-users> Unsubscribe by writing a mail to comp-phys-alps-users-leave@lists.phys.ethz.ch <mailto:comp-phys-alps-users-leave@lists.phys.ethz.ch>. ---- Comp-phys-alps-users Mailing List for the ALPS Project http://alps.comp-phys.org/ List info:https://lists.phys.ethz.ch//listinfo/comp-phys-alps-users <https://lists.phys.ethz.ch//listinfo/comp-phys-alps-users> Archive:https://lists.phys.ethz.ch//pipermail/comp-phys-alps-users <https://lists.phys.ethz.ch//pipermail/comp-phys-alps-users> Unsubscribe by writing a mail tocomp-phys-alps-users-leave@lists.phys.ethz.ch <mailto:comp-phys-alps-users-leave@lists.phys.ethz.ch>.-- __________________________________ DESPRES Julien Ph.D. student Center for Theoretical Physics Quantum Matter Theory team Ecole Polytechnique 91128 Palaiseau Cedex France, EU Office : 00.10.06 (ground floor) Phone :+33 1 64 33 42 81 <tel:+33%201%2064%2033%2042%2081> Laboratoire Charles Fabry Atom Optics group Institut d'Optique Graduate School 2 Avenue Augustin Fresnel 91127 Palaiseau Cedex France, EU Office : R2.29 (1st floor) Phone: +33 1 64 53 33 49 __________________________________ ---- Comp-phys-alps-users Mailing List for the ALPS Project http://alps.comp-phys.org/ List info: https://lists.phys.ethz.ch//listinfo/comp-phys-alps-users <https://lists.phys.ethz.ch//listinfo/comp-phys-alps-users> Archive: https://lists.phys.ethz.ch//pipermail/comp-phys-alps-users <https://lists.phys.ethz.ch//pipermail/comp-phys-alps-users> Unsubscribe by writing a mail to comp-phys-alps-users-leave@lists.phys.ethz.ch <mailto:comp-phys-alps-users-leave@lists.phys.ethz.ch>.
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