N¶

class N(subsystems)[source]¶

Bases: AbstractSubsystemOperator

The number operator.

Defined as the diagonal matrix with with entries [0, ..., dim - 1], where dim is the dimension of the Subsystem the operator is defined on.

Initialize with the list of subsystems the operator acts on.

Methods

base_matrix()[source]¶: Return the matrix defined on the internal subsystems.

matrix(ordered_subsystems=None)¶: Build the matrix for the operator relative to the ordered subsystems.

remove_subsystems(subsystems)¶

Return operator with subsystems removed.

Components of operators with support on removed subsystems will be set to 0.

restrict_subsystems(subsystems)¶

Reduce the operator to the list of subsystems.

Components of operators with support on removed subsystems will be set to 0.

Attributes