def _define_decompositions(self):
"""
gate cu3(theta,phi,lambda) c, t
{ u1((lambda-phi)/2) t; cx c,t;
u3(-theta/2,0,-(phi+lambda)/2) t; cx c,t;
u3(theta/2,phi,0) t;
}
"""
decomposition = DAGCircuit()
q = QuantumRegister(2, "q")
decomposition.add_qreg(q)
decomposition.add_basis_element("u1", 1, 0, 1)
decomposition.add_basis_element("u3", 1, 0, 3)
decomposition.add_basis_element("cx", 2, 0, 0)
rule = [
U1Gate((self.params[2] - self.params[1]) / 2, q[1]),
CnotGate(q[0], q[1]),
U3Gate(-self.params[0] / 2, 0,
-(self.params[1] + self.params[2]) / 2, q[1]),
CnotGate(q[0], q[1]),
U3Gate(self.params[0] / 2, self.params[1], 0, q[1])
]
for inst in rule:
decomposition.apply_operation_back(inst)
self._decompositions = [decomposition]
def _define_decompositions(self):
decomposition = DAGCircuit()
q = QuantumRegister(1, "q")
decomposition.add_qreg(q)
decomposition.add_basis_element("U", 1, 0, 3)
rule = [UBase(self.params[0], self.params[1], self.params[2], q[0])]
for inst in rule:
decomposition.apply_operation_back(inst)
self._decompositions = [decomposition]
def _define_decompositions(self):
decomposition = DAGCircuit()
q = QuantumRegister(1, "q")
decomposition.add_qreg(q)
decomposition.add_basis_element("u1", 1, 0, 1)
rule = [U1Gate(pi, q[0])]
for inst in rule:
decomposition.apply_operation_back(inst)
self._decompositions = [decomposition]
def _define_decompositions(self):
"""
gate ry(theta) a { u3(theta, 0, 0) a; }
"""
decomposition = DAGCircuit()
q = QuantumRegister(1, "q")
decomposition.add_qreg(q)
decomposition.add_basis_element("u3", 1, 0, 3)
rule = [U3Gate(self.params[0], 0, 0, q[0])]
for inst in rule:
decomposition.apply_operation_back(inst)
self._decompositions = [decomposition]
def _define_decompositions(self):
"""
gate h a { u2(0,pi) a; }
"""
decomposition = DAGCircuit()
q = QuantumRegister(1, "q")
decomposition.add_qreg(q)
decomposition.add_basis_element("u2", 1, 0, 2)
rule = [U2Gate(0, pi, q[0])]
for inst in rule:
decomposition.apply_operation_back(inst)
self._decompositions = [decomposition]
def _define_decompositions(self):
"""
gate cx c,t { CX c,t; }
"""
decomposition = DAGCircuit()
q = QuantumRegister(2, "q")
decomposition.add_qreg(q)
decomposition.add_basis_element("CX", 2, 0, 0)
rule = [CXBase(q[0], q[1])]
for inst in rule:
decomposition.apply_operation_back(inst)
self._decompositions = [decomposition]
def _define_decompositions(self):
"""
gate cz a,b { h b; cx a,b; h b; }
"""
decomposition = DAGCircuit()
q = QuantumRegister(2, "q")
decomposition.add_qreg(q)
decomposition.add_basis_element("h", 1, 0, 0)
decomposition.add_basis_element("cx", 2, 0, 0)
rule = [HGate(q[1]), CnotGate(q[0], q[1]), HGate(q[1])]
for inst in rule:
decomposition.apply_operation_back(inst)
self._decompositions = [decomposition]
def dag_to_circuit(dag):
"""Build a ``QuantumCircuit`` object from a ``DAGCircuit``.
Args:
dag (DAGCircuit): the input dag.
Return:
QuantumCircuit: the circuit representing the input dag.
"""
qregs = collections.OrderedDict()
for qreg in dag.qregs.values():
qreg_tmp = QuantumRegister(qreg.size, name=qreg.name)
qregs[qreg.name] = qreg_tmp
cregs = collections.OrderedDict()
for creg in dag.cregs.values():
creg_tmp = ClassicalRegister(creg.size, name=creg.name)
cregs[creg.name] = creg_tmp
name = dag.name or None
circuit = QuantumCircuit(*qregs.values(), *cregs.values(), name=name)
graph = dag.multi_graph
for node in nx.topological_sort(graph):
n = graph.nodes[node]
if n['type'] == 'op':
if n['op'].name == 'U':
name = 'u_base'
elif n['op'].name == 'CX':
name = 'cx_base'
elif n['op'].name == 'id':
name = 'iden'
else:
name = n['op'].name
instr_method = getattr(circuit, name)
qubits = []
for qubit in n['qargs']:
qubits.append(qregs[qubit[0].name][qubit[1]])
clbits = []
for clbit in n['cargs']:
clbits.append(cregs[clbit[0].name][clbit[1]])
params = n['op'].params
if name in ['snapshot', 'save', 'noise', 'load']:
result = instr_method(params[0])
else:
result = instr_method(*params, *qubits, *clbits)
if 'condition' in n and n['condition']:
result.c_if(*n['condition'])
return circuit
def _define_decompositions(self):
"""
gate rzz(theta) a, b { cx a, b; u1(theta) b; cx a, b; }
"""
decomposition = DAGCircuit()
q = QuantumRegister(2, "q")
decomposition.add_qreg(q)
decomposition.add_basis_element("u1", 1, 0, 1)
decomposition.add_basis_element("cx", 2, 0, 0)
rule = [
CnotGate(q[0], q[1]),
U1Gate(self.params[0], q[0]),
CnotGate(q[0], q[1])
]
for inst in rule:
decomposition.apply_operation_back(inst)
self._decompositions = [decomposition]
def _define_decompositions(self):
"""
gate cswap a,b,c
{ cx c,b;
ccx a,b,c;
cx c,b;
}
"""
decomposition = DAGCircuit()
q = QuantumRegister(3, "q")
decomposition.add_qreg(q)
decomposition.add_basis_element("cx", 2, 0, 0)
decomposition.add_basis_element("ccx", 3, 0, 0)
rule = [
CnotGate(q[2], q[1]),
ToffoliGate(q[0], q[1], q[2]),
CnotGate(q[2], q[1])
]
for inst in rule:
decomposition.apply_operation_back(inst)
self._decompositions = [decomposition]
def _define_decompositions(self):
"""
gate ccx a,b,c
{
h c; cx b,c; tdg c; cx a,c;
t c; cx b,c; tdg c; cx a,c;
t b; t c; h c; cx a,b;
t a; tdg b; cx a,b;}
"""
decomposition = DAGCircuit()
q = QuantumRegister(3, "q")
decomposition.add_qreg(q)
decomposition.add_basis_element("h", 1, 0, 0)
decomposition.add_basis_element("cx", 2, 0, 0)
decomposition.add_basis_element("t", 1, 0, 0)
decomposition.add_basis_element("tdg", 1, 0, 0)
decomposition.add_basis_element("s", 1, 0, 0)
decomposition.add_basis_element("sdg", 1, 0, 0)
rule = [
HGate(q[2]),
CnotGate(q[1], q[2]),
TdgGate(q[2]),
CnotGate(q[0], q[2]),
TGate(q[2]),
CnotGate(q[1], q[2]),
TdgGate(q[2]),
CnotGate(q[0], q[2]),
TGate(q[1]),
TGate(q[2]),
HGate(q[2]),
CnotGate(q[0], q[1]),
TGate(q[0]),
TdgGate(q[1]),
CnotGate(q[0], q[1])
]
for inst in rule:
decomposition.apply_operation_back(inst)
self._decompositions = [decomposition]
def _process_node(self, node):
"""Carry out the action associated with a node."""
if node.type == "program":
self._process_children(node)
elif node.type == "qreg":
qreg = QuantumRegister(node.index, node.name)
self.dag.add_qreg(qreg)
elif node.type == "creg":
creg = ClassicalRegister(node.index, node.name)
self.dag.add_creg(creg)
elif node.type == "id":
raise ReNomQError("internal error: _process_node on id")
elif node.type == "int":
raise ReNomQError("internal error: _process_node on int")
elif node.type == "real":
raise ReNomQError("internal error: _process_node on real")
elif node.type == "indexed_id":
raise ReNomQError("internal error: _process_node on indexed_id")
elif node.type == "id_list":
# We process id_list nodes when they are leaves of barriers.
return [
self._process_bit_id(node_children)
for node_children in node.children
]
elif node.type == "primary_list":
# We should only be called for a barrier.
return [self._process_bit_id(m) for m in node.children]
elif node.type == "gate":
self._process_gate(node)
elif node.type == "custom_unitary":
self._process_custom_unitary(node)
elif node.type == "universal_unitary":
args = self._process_node(node.children[0])
qid = self._process_bit_id(node.children[1])
for element in qid:
self.dag.apply_operation_back(UBase(*args, element),
self.condition)
elif node.type == "cnot":
self._process_cnot(node)
elif node.type == "expression_list":
return node.children
elif node.type == "binop":
raise ReNomQError("internal error: _process_node on binop")
elif node.type == "prefix":
raise ReNomQError("internal error: _process_node on prefix")
elif node.type == "measure":
self._process_measure(node)
elif node.type == "format":
self.version = node.version()
elif node.type == "barrier":
ids = self._process_node(node.children[0])
qubits = []
for qubit in ids:
for j, _ in enumerate(qubit):
qubits.append(qubit[j])
self.dag.apply_operation_back(Barrier(qubits))
elif node.type == "reset":
id0 = self._process_bit_id(node.children[0])
for i, _ in enumerate(id0):
self.dag.apply_operation_back(Reset(id0[i]), self.condition)
elif node.type == "if":
self._process_if(node)
elif node.type == "opaque":
self._process_gate(node, opaque=True)
elif node.type == "external":
raise ReNomQError("internal error: _process_node on external")
else:
raise ReNomQError("internal error: undefined node type", node.type,
"line=%s" % node.line, "file=%s" % node.file)
return None