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# TwoQubitBasisDecomposer¶

class TwoQubitBasisDecomposer(gate, basis_fidelity=1.0, euler_basis='U', pulse_optimize=None)[source]

Bases : object

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

Paramètres
• 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”].

• 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.