Hi,
I have this problem that I can't enable the measurement of entropy (Von-Neumann entropy) in the MPS code. I am even using the the same code in Tutorial and adding only the line:
'MEASURE[Entropy]' : 1,
to the parameters in python code, but still the output doesn't have the measurement of entropy in it. Same is true for EnergyVariance. It would be wonderful if someone can tell me what I am doing wrong.
Regards, Amir
Dear Amir,
I think you are using an old version of ALPS, i.e. before we finalized the paper. (the binary builds online are old)
To enable these feature you should compile a recent version of the code. You can get the latest version of ALPS form the public repository: svn co https://alps.comp-phys.org/svn/alps1/trunk/alps
Regards, Michele
On 16.01.2015 02:55, Amir M.Aghaei wrote:
Dear Michele,
Thank you very much for your answer. I'll try the new code today to see if I can get the results.
By the way is there anyway to ask for the whole spectrum of entanglement instead of the entropies? This should be easy, so even if it's not implemented and if you're willing to show me which file(s) I should look into, I am happy to make the change myself.(I have to say that I am very new to the whole alps projects though)
Regards, Amir
On Fri, Jan 16, 2015 at 12:25 PM, Michele Dolfi dolfim@phys.ethz.ch wrote:
Yes, it is possible.
Just have a look at this previous topic, where I attached an example script. You can specify the sites where you want to measure the entanglement spectrum.
https://lists.phys.ethz.ch/pipermail/comp-phys-alps-users/2015/002677.html
Best regards, Michele
On 16.01.2015 21:45, Amir M.Aghaei wrote:
comp-phys-alps-users@lists.phys.ethz.ch