Qiskit / qiskit / 11218290900

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Build Type

push

github

Committed by web-flow

Commit Message

Set num_qubits kwarg when building UnitaryGate from Rust (#13282)

In the accelerate crate we currently have two places that are building
`UnitaryGate`, the quantum_volume() function that builds a quantum
volume model circuit and the Split2QUnitaries transpiler pass. Currently
this can only be done by calling Python (until #13272 is implemented)
and there was a potential optimization we could make to specify the
number of qubits as an argument to the Python constructor. This skipss
the need for a few python operations to compute the number of qubits
from the size of the matrix. These operations are not exceedingly slow,
but as these Python space constructors are often the bottleneck so it
should help runtime performance of these two functions.

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