[ALPS-users] Fwd: Re: diagonal correlations
Julien
julien.despres at institutoptique.fr
Wed Feb 8 09:50:41 CET 2017
The operator defined in the 'sitebasis' of a Hamiltonian is only valid
for this Hamiltonian which is not the case when you define it as a
'siteoperator'. You can use it for different models at the condition
that the operators that you use inside this function are defined in the
corresponding 'sitebasis'. And one more thing, your function for the
magnetization 'diag_mag_correct' is not correct from what has been said
previously.
Julien
On 08/02/2017 00:56, Robertson Esperanza wrote:
> I see, so you defined the operator under the SITEBASIS. I thought it
> would work if you define it, as suggested on the earlier replies, as a
> site operator. I don't know the difference though, thank you for the help.
>
> On Wed, Feb 8, 2017 at 3:04 AM, julien
> <julien.despres at institutoptique.fr
> <mailto:julien.despres at institutoptique.fr>> wrote:
>
> 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>
>>>>> __________________________________
>>>>>
>>>>> ---- Comp-phys-alps-users Mailing List for the
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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>
>>> __________________________________
>>>
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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:
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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:
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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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