# Barrier¶

class Barrier(num_qubits)[source]

Barrier instruction.

Create new barrier instruction.

Attributes

 Barrier.decompositions Get the decompositions of the instruction from the SessionEquivalenceLibrary. Barrier.definition Return definition in terms of other basic gates. Barrier.params return instruction params.

Methods

 Barrier.add_decomposition(decomposition) Add a decomposition of the instruction to the SessionEquivalenceLibrary. Assemble a QasmQobjInstruction Barrier.broadcast_arguments(qargs, cargs) Validation of the arguments. Barrier.c_if(classical, val) Add classical condition on register classical and value val. Barrier.copy([name]) Copy of the instruction. Special case. Return True .IFF. DEPRECATED: use instruction.reverse_ops(). Return a default OpenQASM string for the instruction. Creates an instruction with gate repeated n amount of times. For a composite instruction, reverse the order of sub-instructions.