mindquantum.algorithm.compiler.u3_decompose

mindquantum.algorithm.compiler.u3_decompose(gate: U3, method: str = 'standard')

Decompose a U3 gate into a sequence of Z-X-Z-X-Z rotations.

The decomposition follows one of two methods: 1. standard: U3(θ,φ,λ) = Rz(φ)Rx(-π/2)Rz(θ)Rx(π/2)Rz(λ) 2. alternative: U3(θ,φ,λ) = Rz(φ)Rx(π/2)Rz(π-θ)Rx(π/2)Rz(λ-π)

When any rotation angle is a constant value and equals to 0, the corresponding RZ gate will be omitted.

Parameters

• gate (U3) – The U3 gate to be decomposed.

• method (str) – The decomposition method to use, either 'standard' or 'alternative'. Default: 'standard'

Returns

A quantum circuit implementing the U3 gate using ZXZXZ sequence.

Return type

Circuit

Raises

ValueError – If the method is not 'standard' or 'alternative'.