mindquantum.core.circuit.QubitIDConstrain

class mindquantum.core.circuit.QubitIDConstrain(qubit_ids: Union[int, List[int]], add_after: bool = True)

Select gate with qubit id in given list.

Parameters

• qubit_ids (Union[int, List[int]]) – The qubit id list you want to select.

• add_after (bool) – Whether add channel after gate or before gate. Default: True.

Examples

>>> from mindquantum.core.circuit import MixerAdder, BitFlipAdder, QubitIDConstrain, Circuit
>>> circ = Circuit().h(0).h(1).h(2).x(1, 0).x(2, 1)
>>> circ
      ┏━━━┓
q0: ──┨ H ┠───■───────────
      ┗━━━┛   ┃
      ┏━━━┓ ┏━┻━┓
q1: ──┨ H ┠─┨╺╋╸┠───■─────
      ┗━━━┛ ┗━━━┛   ┃
      ┏━━━┓       ┏━┻━┓
q2: ──┨ H ┠───────┨╺╋╸┠───
      ┗━━━┛       ┗━━━┛
>>> adder = MixerAdder([
...     QubitIDConstrain([0, 1]),
...     BitFlipAdder(0.1),
... ])
>>> adder(circ)
      ┏━━━┓ ╔═════════════╗       ╔═════════════╗
q0: ──┨ H ┠─╢ BFC(p=1/10) ╟───■───╢ BFC(p=1/10) ╟─────────
      ┗━━━┛ ╚═════════════╝   ┃   ╚═════════════╝
      ┏━━━┓ ╔═════════════╗ ┏━┻━┓ ╔═════════════╗
q1: ──┨ H ┠─╢ BFC(p=1/10) ╟─┨╺╋╸┠─╢ BFC(p=1/10) ╟───■─────
      ┗━━━┛ ╚═════════════╝ ┗━━━┛ ╚═════════════╝   ┃
      ┏━━━┓                                       ┏━┻━┓
q2: ──┨ H ┠───────────────────────────────────────┨╺╋╸┠───
      ┗━━━┛                                       ┗━━━┛