## 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?