Different Energy measures giving mixed results
Posted: 14 Jul 2022, 00:53
Hi,
I'm looking at the time-evolution of a product state under a time-dependent Hamiltonian using iTEBD. For certain simulation parameters, it's the case that when I measure the bond-energy, using M.bond_energies() for a model M, that energy is different for the two bonds. This is an issue in my research project, and I'm just wondering if you have any advice on how to remedy this? The issue seems to be that the state is breaking translational invariance, but it shouldn't be with exact time evolution. This leads to none smooth answers for the energy as a function of the rate at which I change the Hamiltonian coupling constants in the time evolution.
Thanks for any suggestions.
Best,
Nick
I'm looking at the time-evolution of a product state under a time-dependent Hamiltonian using iTEBD. For certain simulation parameters, it's the case that when I measure the bond-energy, using M.bond_energies() for a model M, that energy is different for the two bonds. This is an issue in my research project, and I'm just wondering if you have any advice on how to remedy this? The issue seems to be that the state is breaking translational invariance, but it shouldn't be with exact time evolution. This leads to none smooth answers for the energy as a function of the rate at which I change the Hamiltonian coupling constants in the time evolution.
Thanks for any suggestions.
Best,
Nick