def _process_cnot(self, node):
"""Process a CNOT gate node."""
id0 = self._process_bit_id(node.children[0])
id1 = self._process_bit_id(node.children[1])
if not(len(id0) == len(id1) or len(id0) == 1 or len(id1) == 1):
raise QiskitError("internal error: qreg size mismatch",
"line=%s" % node.line, "file=%s" % node.file)
maxidx = max([len(id0), len(id1)])
for idx in range(maxidx):
if len(id0) > 1 and len(id1) > 1:
self.dag.apply_operation_back(CXBase(id0[idx], id1[idx]), self.condition)
elif len(id0) > 1:
self.dag.apply_operation_back(CXBase(id0[idx], id1[0]), self.condition)
else:
self.dag.apply_operation_back(CXBase(id0[0], id1[idx]), self.condition)
def cx(self, qubit0, qubit1):
"""Fundamental two-qubit gate.
"""
if self.listen:
if self.creg is not None:
condition = (self.creg, self.cval)
else:
condition = None
self.circuit.apply_operation_back(CXBase(qubit0, qubit1),
condition)
def _define(self):
"""
gate cx c,t { CX c,t; }
"""
definition = []
q = QuantumRegister(2, "q")
rule = [(CXBase(), [q[0], q[1]], [])]
for inst in rule:
definition.append(inst)
self.definition = definition
def _define_decompositions(self):
"""
gate cx c,t { CX c,t; }
"""
decomposition = DAGCircuit()
q = QuantumRegister(2, "q")
decomposition.add_qreg(q)
rule = [CXBase(q[0], q[1])]
for inst in rule:
decomposition.apply_operation_back(inst)
self._decompositions = [decomposition]