qrisp.QuantumCircuit.cnot_depth#
- QuantumCircuit.cnot_depth()[source]#
This function returns the CNOT-depth of an self.
In NISQ-era devices, CNOT gates are the restricting bottleneck for quantum circuit execution. This function can be used as a gate-speed specifier for the :meth:`compile <qrisp.QuantumSession.compile>`_ method.
- Returns:
- int
The CNOT depth of self.
Examples
We create a QuantumCircuit and evaluate it’s CNOT depth.
>>> from qrisp import QuantumCircuit >>> qc = QuantumCircuit(4) >>> qc.cx(0,1) >>> qc.x(1) >>> qc.cx(1,2) >>> qc.y(2) >>> qc.cx(2,3) >>> qc.cx(1,0) >>> print(qc) ┌───┐ qb_59: ──■────────────┤ X ├───── ┌─┴─┐┌───┐ └─┬─┘ qb_60: ┤ X ├┤ X ├──■────■─────── └───┘└───┘┌─┴─┐┌───┐ qb_61: ──────────┤ X ├┤ Y ├──■── └───┘└───┘┌─┴─┐ qb_62: ────────────────────┤ X ├ └───┘
>>> qc.cnot_depth() 3