mindquantum.algorithm.compiler.u3_decompose

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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’.

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