Source code for mimiqcircuits.operations.barrier

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from mimiqcircuits.operations.operation import Operation
import mimiqcircuits.lazy as lz


[docs] class Barrier(Operation): """Barrier operation. A barrier is a special operation that does not affect the quantum state or the execution of a circuit, but it prevents compression or optimization operation from being applied across it. Examples: Adding Barrier operation to the Circuit (The args can be: range, list, tuple, set or int) >>> from mimiqcircuits import * >>> c= Circuit() >>> c.push(Barrier(1), 1) 2-qubit circuit with 1 instructions: └── Barrier @ q[1] <BLANKLINE> >>> from mimiqcircuits import * >>> c= Circuit() >>> c.push(Barrier(1), range(0,4)) 4-qubit circuit with 4 instructions: ├── Barrier @ q[0] ├── Barrier @ q[1] ├── Barrier @ q[2] └── Barrier @ q[3] <BLANKLINE> Adding Barrier to the circuit as a multi-qubits gate >>> from mimiqcircuits import * >>> c= Circuit() >>> c.push(Barrier(5),1,2,3,4,5) 6-qubit circuit with 1 instructions: └── Barrier @ q[1,2,3,4,5] <BLANKLINE> """ _name = "Barrier" _num_qubits = None _num_bits = 0 _num_zvars = 0 def __init__(self, num_qubits): """ Initialize a barrier operation Args: num_qubits: number of qubits the barrier will cover Raises: ValueError: if num_qubits is less than 1 """ super().__init__() if num_qubits < 1: raise ValueError("Number of qubits must be greater than 0") self._num_qubits = num_qubits self._qregsizes = [num_qubits] def __new__(self, *args): if len(args) == 0: return lz.LazyExpr(Barrier, lz.LazyArg()) elif len(args) == 1: return object.__new__(self) else: raise ValueError("Invalid number of arguments.")
[docs] def inverse(self): return self
[docs] def power(self, p): raise TypeError("Barrier^p is not defined.")
[docs] def control(self, num_qubits): raise TypeError("Controlled Barrier is not defined.")
[docs] def iswrapper(self): return False
[docs] def asciiwidth(self, qubits, bits, zvars): return 1
# export operations __all__ = ["Barrier"]