[ALPS-users] Fwd: Re: diagonal correlations
julien
julien.despres at institutoptique.fr
Tue Feb 7 20:04:50 CET 2017
I forgot the corresponding python script ...
On 07/02/2017 17:04, Robertson Esperanza wrote:
> Yes, it is intended when I attached it, so it can be changed. When i
> run the script, I put the filepath, but I still get the x = [0], y =
> [0] result. Can I see what's the result when you run the script? Thank
> you for the help.
>
> On Tue, Feb 7, 2017 at 6:53 PM, Julien
> <julien.despres at institutoptique.fr
> <mailto:julien.despres at institutoptique.fr>> wrote:
>
> yes, there is no path ...
>
> Julien
>
>
> On 07/02/2017 09:53, Robertson Esperanza wrote:
>> the line where I put the file path of the xml file (i.e.
>> 'MODEL_LIBRARY':) ?
>>
>> On Tue, Feb 7, 2017 at 4:04 PM, Julien
>> <julien.despres at institutoptique.fr
>> <mailto:julien.despres at institutoptique.fr>> wrote:
>>
>> 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 <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 <tel:+33%201%2064%2053%2033%2049>
>>> __________________________________
>>> 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 at institutoptique.fr
>>>> <mailto:julien.despres at 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 at phys.ethz.ch <mailto:dolfim at 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 at phys.ethz.ch <mailto:dolfim at 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> fax
>>>>>> On 6 Feb 2017, at 08:50, Robertson Esperanza
>>>>>> <robbie.esperanza at gmail.com
>>>>>> <mailto:robbie.esperanza at 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 at phys.ethz.ch
>>>>>> <mailto:dolfim at 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 at phys.ethz.ch <mailto:dolfim at 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> fax
>>>>>>> On 6 Feb 2017, at 07:26, Robertson Esperanza
>>>>>>> <robbie.esperanza at gmail.com
>>>>>>> <mailto:robbie.esperanza at 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
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>>>>
>>>> --
>>>> __________________________________
>>>>
>>>> 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 <tel:+33%201%2064%2053%2033%2049>
>>>> __________________________________
>>>>
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>>>> Project http://alps.comp-phys.org/ List info:
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>>> -
>>>
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>> --
>> __________________________________
>>
>> 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 <tel:+33%201%2064%2053%2033%2049>
>> __________________________________
>>
>> ---- 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>
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> --
> __________________________________
>
> 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>
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--
__________________________________
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
__________________________________
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