## Search found 5 matches

27 Apr 2021, 14:16
Forum: HowTos and FAQ for TeNPy
Topic: Neutral Energy Gap in the extended Boson Hubbard Model
Replies: 4
Views: 361

### Re: Neutral Energy Gap in the extended Boson Hubbard Model

Thank you for your suggestion. I will try this method
27 Apr 2021, 07:30
Forum: HowTos and FAQ for TeNPy
Topic: Neutral Energy Gap in the extended Boson Hubbard Model
Replies: 4
Views: 361

### Re: Neutral Energy Gap in the extended Boson Hubbard Model

My model is softcore bosons. For computational purposes, I have truncated the Hilbert space to a maximum of two bosons per site. Also, do I have to find the correlation length only for the ground state or for both the ground state and excited state of the system? I am unable to understand how the co...
18 Apr 2021, 05:54
Forum: HowTos and FAQ for TeNPy
Topic: Neutral Energy Gap in the extended Boson Hubbard Model
Replies: 4
Views: 361

### Neutral Energy Gap in the extended Boson Hubbard Model

I am trying to evaluate the neutral energy gap of the extended Boson Hubbard model in one dimension. (Neutral Energy Gap = E_n = E^{1}_N - E^{0}_N ) where E^{1}(N) is the energy of the first excited state of the hamiltonian and E^{0}(N) is the ground state energy. N is the number of Bosons in the sy...
15 Apr 2021, 17:14
Forum: Implementations
Topic: Keeping number of particles fixed at edges
Replies: 1
Views: 271

### Keeping number of particles fixed at edges

I am currently trying to calculate the charge gap E_c = E^{0}(N+1) + E^{0}(N-1) - 2 E^{0}(N) and the neutral gap E_n = E^{1}(N) - E^{0}(N) of the extended Boson Hubbard model in one dimension. ( E^{1}(N) is the energy of the first excited state , E^{0}(N) is the energy of the ground state. N is the ...
14 Apr 2021, 18:35
Forum: HowTos and FAQ for TeNPy
Topic: Excited states using tenpy
Replies: 11
Views: 1398

### Re: Excited states using tenpy

If the energies of the eigenstates are greater than 0, how do we then find the excited states and their corresponding energies?