Jared Bland

Is there any reason that a symmetry generator would make an otherwise properly working operator not injective? I've attached an attempt to add the discrete symmetry generator alla Daniel's method in the Bose Hubbard model linked in my previous reply. The only other example I found is in a two flavored model here: https://sourceforge.net/p/openmps/discussion/tech/thread/134fa04f/?limit=25#903a There Rafael has a two species Fermi Hubbard model, which seems to not be functioning correction from the...

In using the Kitaev Wire Model to explore the features of the OSMPS tools, I was hoping to learn a little more about the quantum information tools available while waiting to see what's going on for the discrete symmetries and multi-flavor Fermionic MPS. For the bond entropy, is this defined as the entanglement entropy between the left and right hand sides of the bond? From printing the array, it seems that the bond entropy gives an L+1 array with index 0 being the bond entropy between site zero and...

Small Typos in Python Module obsterms Documentation

Thank you for the help, Matt! I don't mind it at all. A new discussion with a different header will also make it easier for others to search.

Thank you, Daniel. When I try that, by adding Operators['symm_gen'] = np.fmod(Operators['nftotal'],2) before the generating the parameters and just 'Discrete_generators' : ['symm_gen'], inside the parameters definition, I get an error that the chemical potential term that I defined is not injective. I get the same error when I try to specify Discrete_quantum_numbers : [0] for the initial state inside the parameters definition. Should I try the if-then method you implemented in the openBH_correct_initial_state.py...

Thank you. That post I referenced had code using Discrete_generators was from 2016 - I thought it had been implemented - so I thought perhaps we should use that for global discrete symmetries. I'm not yet totally python literate - I'm learning python as I explore this tool (sorry!), so I'm missing a detailed understanding of things like Python dictionaries. I'll look into it tonight. Most of my python experience has been yelling at my machine for caring about number of spaces/tabs and not having...

How do we implement global discrete symmetries? In https://sourceforge.net/p/openmps/discussion/tech/thread/7dd1fa40/?limit=25#9544 the idea of a parity / global Z2 is mentioned, but I can't seem to implement it correctly. From that: " Discrete symmetries are of Ising Z2 type which looks to me like your case. Your symmetry generator would be the matrix with diagonal entries (0, 1, 0, 1, ...), in case with spinless fermions of all the same type only (0, 1)" Is there some particular formatting to use?...

Okay, great. Thank you.