pmm_tools.models.chains
Parameterized interacting spinless and spinful chain Hamiltonians.
Functions
| Name | Description |
|---|---|
dot_abs_chain | Return (Hamiltonian, fermions, parameters) for a spinful dot/ABS chain. |
interacting_kitaev_chain | Return (Hamiltonian, fermions, parameters) for an interacting Kitaev chain. |
dot_abs_chainfunction#
def dot_abs_chain(length, params=None)Return (Hamiltonian, fermions, parameters) for a spinful dot/ABS chain.
params supplies mu, E_z, Delta, t_n, t_so and U using the policies of
prepare_parameters. Returned tuples follow site/bond order; modes are
(site0 up, site0 down, site1 up, ...). Onsite energies are mu +/- E_z,
pairing Delta may be complex, and U couples opposite spins on each site.
Adjacent sites have spin-preserving t_n and spin-flip t_so hopping.
All energies share a caller-chosen unit; the full Fock space is retained.
interacting_kitaev_chainfunction#
def interacting_kitaev_chain(length, params=None)Return (Hamiltonian, fermions, parameters) for an interacting Kitaev chain.
params supplies mu, t, Delta and nearest-neighbor U using the scalar,
sequence or symbolic policies of prepare_parameters. Returned parameter
values are tuples in site/bond order. Modes are c_0,...,c_(length-1).
The Hamiltonian contains +mu*n, hopping t, pair creation Delta and U*n*n_next,
with Hermitian conjugates for hopping and pairing. All energies use the
same caller-chosen unit; no Hilbert-space projection is made.