TwoQubitBasisDecomposer

class TwoQubitBasisDecomposer(gate, basis_fidelity=1.0, euler_basis=None, pulse_optimize=None)

Bases: object

A class for decomposing 2-qubit unitaries into minimal number of uses of a 2-qubit basis gate.

Parameters

• gate (Gate) – Two-qubit gate to be used in the KAK decomposition.

• basis_fidelity (float) – Fidelity to be assumed for applications of KAK Gate. Default 1.0.

• euler_basis (str) – Basis string to be provided to OneQubitEulerDecomposer for 1Q synthesis. Valid options are [‘ZYZ’, ‘ZXZ’, ‘XYX’, ‘U’, ‘U3’, ‘U1X’, ‘PSX’, ‘ZSX’, ‘RR’]. Default ‘U3’.

• pulse_optimize (None or bool) – If True, try to do decomposition which minimizes local unitaries in between entangling gates. This will raise an exception if an optimal decomposition is not implemented. Currently, only [{CX, SX, RZ}] is known. If False, don’t attempt optimization. If None, attempt optimization but don’t raise if unknown.

Methods

decomp0	Decompose target ~Ud(x, y, z) with 0 uses of the basis gate.
decomp1	Decompose target ~Ud(x, y, z) with 1 uses of the basis gate ~Ud(a, b, c). Result Ur has trace: .. math::.
decomp2_supercontrolled	Decompose target ~Ud(x, y, z) with 2 uses of the basis gate.
decomp3_supercontrolled	Decompose target with 3 uses of the basis.
num_basis_gates	Computes the number of basis gates needed in a decomposition of input unitary
traces	Give the expected traces \(|Tr(U \cdot Utarget^dag)|\) for different number of basis gates.