kwant.solvers.default.ldos

kwant.solvers.default.ldos(sys, energy=0, args=(), check_hermiticity=True, *, params=None)

Calculate the local density of states of a system at a given energy.

An alias exists for this common name: kwant.ldos.

Parameters:

sys : kwant.system.FiniteSystem

Low level system, containing the leads and the Hamiltonian of the scattering region.

energy : number

Excitation energy at which to solve the scattering problem.

args : tuple of arguments, or empty tuple

Positional arguments to pass to the function(s) which evaluate the hamiltonian matrix elements. Mutually exclusive with ‘params’.

check_hermiticity : bool

Check if the Hamiltonian matrices are Hermitian.

params : dict, optional

Dictionary of parameter names and their values. Mutually exclusive with ‘args’.

Returns:

ldos : a NumPy array

Local density of states at each orbital of the system.