mindquantum.algorithm.compiler.abc_decompose

mindquantum.algorithm.compiler.abc_decompose(gate: QuantumGate, return_u3: bool = True)[source]

Decompose two-qubit controlled gate via ABC decomposition.

Parameters

gate (QuantumGate) – quantum gate with 1 control bit and 1 target bit.
return_u3 (bool) – return gates in form of U3 if True, otherwise return UnivMathGate. Default: True.

Returns

Circuit, including at most 2 CNOT gates and 4 single-qubit gates.

Examples

>>> import mindquantum as mq
>>> from mindquantum.algorithm.compiler.decompose import abc_decompose
>>> from scipy.stats import unitary_group
>>> g = mq.UnivMathGate('U', unitary_group.rvs(2, random_state=123)).on(1, 0)
>>> print(mq.Circuit() + g)
q0: ────■─────
        ┃
      ┏━┻━┓
q1: ──┨ U ┠───
      ┗━━━┛
>>> circ_decomposed = abc_decompose(g)
>>> print(circ_decomposed)
                                                                  ┏━━━━━━━━━━━━┓
q0: ───────────────────■──────────────────────────────────────■───┨ RZ(1.1469) ┠────────────────────
                       ┃                                      ┃   ┗━━━━━━━━━━━━┛
      ┏━━━━━━━━━━━━┓ ┏━┻━┓ ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ ┏━┻━┓ ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
q1: ──┨ RZ(2.6016) ┠─┨╺╋╸┠─┨ U3(θ=1.1043, φ=π, λ=-0.6572) ┠─┨╺╋╸┠─┨ U3(θ=1.1043, φ=-5.086, λ=0) ┠───
      ┗━━━━━━━━━━━━┛ ┗━━━┛ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ ┗━━━┛ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛