qiskit.quantum_info.Choi.power¶
-
Choi.power(n)¶ Return the power of the quantum channel.
- Parameters
n (float) – the power exponent.
- Returns
the channel \(\mathcal{{E}} ^n\).
- Return type
- Raises
QiskitError – if the input and output dimensions of the SuperOp are not equal.
Note
For non-positive or non-integer exponents the power is defined as the matrix power of the
SuperOprepresentation ie. for a channel \(\mathcal{{E}}\), the SuperOp of the powered channel \(\mathcal{{E}}^\n\) is \(S_{{\mathcal{{E}}^n}} = S_{{\mathcal{{E}}}}^n\).