pwc_operator
- Graph.pwc_operator(signal, operator, *, name=None)
Create a constant operator multiplied by a piecewise-constant signal.
- Parameters:
- Returns:
The piecewise-constant operator \(a(t)A\) (or a batch of piecewise-constant operators, if you provide a batch of piecewise-constant signals).
- Return type:
See also
Graph.complex_pwc_signal
Create complex Pwc signals from their moduli and phases.
Graph.constant_pwc_operator
Create constant Pwcs.
Graph.hermitian_part
Hermitian part of an operator.
Graph.pwc
Create piecewise-constant functions.
Graph.pwc_signal
Create Pwc signals from (possibly complex) values.
Graph.pwc_sum
Sum multiple Pwcs.
Graph.stf_operator
Corresponding operation for Stfs.
Notes
For more information on Pwc nodes see the Working with time-dependent functions in Boulder Opal topic.
Examples
Create a piecewise-constant operator with non-uniform segment durations.
>>> sigma_z = np.array([[1.0, 0.0],[0.0, -1.0]]) >>> graph.pwc_operator( ... signal=graph.pwc(durations=np.array([0.1, 0.2]), values=np.array([1, 2])), ... operator=sigma_z, ... name="operator", ... ) <Pwc: name="operator", operation_name="pwc_operator", value_shape=(2, 2), batch_shape=()> >>> result = bo.execute_graph(graph=graph, output_node_names="operator") >>> result["output"]["operator"] { 'durations': array([0.1, 0.2]), 'values': array([ [[ 1., 0.], [ 0., -1.]], [[ 2., 0.], [ 0., -2.]] ]), 'time_dimension': 0 }
See more examples in the How to represent quantum systems using graphs user guide.