kwant.solvers.default.
smatrix
(sys, energy=0, args=(), out_leads=None, in_leads=None, check_hermiticity=True, *, params=None)[source]¶Compute the scattering matrix of a system.
An alias exists for this common name: kwant.smatrix
.
kwant.system.FiniteSystem
Low level system, containing the leads and the Hamiltonian of a scattering region.
Excitation energy at which to solve the scattering problem.
Positional arguments to pass to the hamiltonian
method.
Deprecated in favor of ‘params’ (and mutually exclusive with it).
None
Numbers of leads where current or wave function is extracted. None
is interpreted as all leads. Default is None
and means “all
leads”.
None
Numbers of leads in which current or wave function is injected.
None is interpreted as all leads. Default is None
and means
“all leads”.
bool
Check if the Hamiltonian matrices are Hermitian. Enables deduction of missing transmission coefficients.
Dictionary of parameter names and their values. Mutually exclusive with ‘args’.
Notes
This function can be used to calculate the conductance and other
transport properties of a system. See the documentation for its output
type, SMatrix
.
The returned object contains the scattering matrix elements from the in_leads to the out_leads as well as information about the lead modes.
Both in_leads and out_leads must be sorted and may only contain unique entries.