A¶

class A(subsystems)[source]¶

Bases: AbstractSubsystemOperator

Annihilation operator.

Defined as the matrix with non-zero entries \(0, 1, \sqrt{2}, ..., \sqrt{n - 1}\) in the first off-diagonal, where \(n\) is the dimension of the subsystem being acted 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.

Return type:: AbstractSubsystemOperator

restrict_subsystems(subsystems)¶

Reduce the operator to the list of subsystems.

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

Return type:: AbstractSubsystemOperator

Attributes

subsystems¶: Get the subsystems the operator acts on.