tkwant.onebody.kernels.Scipy

class tkwant.onebody.kernels.Scipy(self, H0, W, params, psi_st=None)

Evaluate the RHS of the Schrödinger equation using scipy sparse.

Parameters

• H0 (scipy.sparse.base) – Hamiltonian at t=0 (including any boundary conditions).

• W (callable) – Time-dependent part of the Hamiltonian. Typically the object returned by tkwant.system.extract_perturbation.

• params (dict) – Extra arguments to pass to the system Hamiltonian excluding time.

• psi_st (array of complex, optional) – The wavefunction of the initial eigenstate defined over the central system (if starting in an initial eigenstate).

H0

Hamiltonian at t=0 (including any boundary conditions).

Type

scipy.sparse.csr_matrix

W

Time-dependent part of the Hamiltonian. Typically the object returned by tkwant.system.extract_perturbation.

Type

callable

params

Extra arguments to pass to the system Hamiltonian excluding the time argument.

Type

dict

psi_st

The wavefunction of the initial eigenstate defined over the central system (if starting in an initial eigenstate).

Type

array of complex or None

size

The size of the time-independent part of the Hamiltonian. This also sets the size of the solution vector.

Type

int

nevals

The number of times this kernel has been evaluated since its creation.

Type

int

Methods

rhs(self, const double complex[:] psi, double complex[:] dpsidt, double time)

Evaluate the RHS of the TDSE and store the result in dpsidt.

set_params(self, params)

Attributes

nevals

‘int’

Type

nevals

size

‘int’

Type

size