qiskit.opflow.state_fns.CircuitStateFn.compose¶
- CircuitStateFn.compose(other, permutation=None, front=False)[source]¶
Composition (Linear algebra-style: A@B(x) = A(B(x))) is not well defined for states in the binary function model, but is well defined for measurements.
- Parameters
other (
OperatorBase
) -- The Operator to compose with self.permutation (
Optional
[List
[int
]]) --List[int]
which defines permutation on other operator.front (
bool
) -- If front==True, returnother.compose(self)
.
- Return type
- Returns
An Operator equivalent to the function composition of self and other.
- Raises
ValueError -- If self is not a measurement, it cannot be composed from the right.