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[WIP] Add 2q fractional gates to the ConsolidateBlocks transpiler pass #13884

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[WIP] Add 2q fractional gates to the ConsolidateBlocks transpiler pass #13884

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2aed635
add TwoQubitControlledUDecomposer to init file
ShellyGarion Feb 19, 2025
12e6fab
add kak parametrized gates
ShellyGarion Feb 19, 2025
bc8fa33
add a test for parametrized gates
ShellyGarion Feb 19, 2025
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1 change: 1 addition & 0 deletions qiskit/synthesis/two_qubit/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -16,4 +16,5 @@
TwoQubitBasisDecomposer,
two_qubit_cnot_decompose,
TwoQubitWeylDecomposition,
TwoQubitControlledUDecomposer,
)
39 changes: 31 additions & 8 deletions qiskit/transpiler/passes/optimization/consolidate_blocks.py
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Expand Up @@ -12,10 +12,22 @@

"""Replace each block of consecutive gates by a single Unitary node."""
from __future__ import annotations
from math import pi

from qiskit.synthesis.two_qubit import TwoQubitBasisDecomposer
from qiskit.circuit.library.standard_gates import CXGate, CZGate, iSwapGate, ECRGate, RXXGate
from qiskit.synthesis.two_qubit import TwoQubitBasisDecomposer, TwoQubitControlledUDecomposer
from qiskit.circuit.library.standard_gates import (
CXGate,
CZGate,
iSwapGate,
ECRGate,
RXXGate,
RYYGate,
RZZGate,
RZXGate,
CRXGate,
CRYGate,
CRZGate,
CPhaseGate,
)

from qiskit.transpiler.basepasses import TransformationPass
from qiskit.transpiler.passmanager import PassManager
Expand All @@ -29,7 +41,18 @@
"cz": CZGate(),
"iswap": iSwapGate(),
"ecr": ECRGate(),
"rxx": RXXGate(pi / 2),
# "rxx": RXXGate(pi / 2),
}

KAK_GATE_PARAM_NAMES = {
"rxx": RXXGate,
"rzz": RZZGate,
"ryy": RYYGate,
"rzx": RZXGate,
"cphase": CPhaseGate,
"crx": CRXGate,
"cry": CRYGate,
"crz": CRZGate,
}


Expand Down Expand Up @@ -81,10 +104,10 @@ def __init__(
self.decomposer = TwoQubitBasisDecomposer(
KAK_GATE_NAMES[kak_gates.pop()], basis_fidelity=approximation_degree or 1.0
)
elif "rzx" in basis_gates:
self.decomposer = TwoQubitBasisDecomposer(
CXGate(), basis_fidelity=approximation_degree or 1.0
)
# elif "rzx" in basis_gates:
# self.decomposer = TwoQubitBasisDecomposer(
# CXGate(), basis_fidelity=approximation_degree or 1.0
# )
else:
self.decomposer = None
else:
Expand Down
10 changes: 10 additions & 0 deletions test/python/transpiler/test_consolidate_blocks.py
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Expand Up @@ -666,6 +666,16 @@ def test_non_cx_target(self):
self.assertEqual({"unitary": 1}, res.count_ops())
self.assertEqual(Operator.from_circuit(qc), Operator(res.data[0].operation.params[0]))

def test_collect_rzz(self):
"""Collect blocks with RZZ gates."""
qc = QuantumCircuit(2)
qc.rzz(0.1, 0, 1)
qc.rzz(0.2, 0, 1)
qc.rzz(0.3, 0, 1)
qc.rzz(0.4, 0, 1)
consolidate_pass = ConsolidateBlocks(basis_gates=["rzz", "rx", "rz"])
qc2 = consolidate_pass(qc)


if __name__ == "__main__":
unittest.main()
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