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Define cirq.ISWAP_INV #4624

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Define cirq.ISWAP_INV #4624

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dc23211
Define cirq.ISWAP_INV
unaiic Nov 3, 2021
1860bb2
Add ISWAP_INV to cirq.ops
unaiic Nov 3, 2021
fc46e13
Merge branch 'master' into issue4615
dabacon May 11, 2022
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1 change: 1 addition & 0 deletions cirq-core/cirq/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -240,6 +240,7 @@
IdentityGate,
InterchangeableQubitsGate,
ISWAP,
ISWAP_INV,
ISwapPowGate,
KrausChannel,
LinearCombinationOfGates,
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1 change: 1 addition & 0 deletions cirq-core/cirq/ops/__init__.py
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Expand Up @@ -179,6 +179,7 @@

from cirq.ops.swap_gates import (
ISWAP,
ISWAP_INV,
ISwapPowGate,
riswap,
SQRT_ISWAP,
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1 change: 1 addition & 0 deletions cirq-core/cirq/ops/pauli_string_test.py
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Expand Up @@ -1478,6 +1478,7 @@ def _decompose_(self, qubits):
cirq.CNOT,
cirq.CZ,
cirq.ISWAP,
cirq.ISWAP_INV,
cirq.ISWAP**-1,
cirq.SWAP,
cirq.XX**0.5,
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16 changes: 16 additions & 0 deletions cirq-core/cirq/ops/swap_gates.py
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Expand Up @@ -16,6 +16,7 @@
This module creates Gate instances for the following gates:
SWAP: the swap gate.
ISWAP: a swap gate with a phase on the swapped subspace.
ISWAP_INV: inverse of the ISWAP gate.
SQRT_ISWAP: square root of the ISWAP gate.
SQRT_ISWAP_INV: inverse square root of the ISWAP gate.

Expand Down Expand Up @@ -319,6 +320,21 @@ def riswap(rads: value.TParamVal) -> ISwapPowGate:
""",
)

ISWAP_INV = ISwapPowGate(exponent=-1)
document(
ISWAP_INV,
"""The inverse of iswap gate.

Matrix:
```
[[1, 0, 0, 0],
[0, 0, -i, 0],
[0, -i, 0, 0],
[0, 0, 0, 1]]
```
""",
)

SQRT_ISWAP = ISwapPowGate(exponent=0.5)
document(
SQRT_ISWAP,
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1 change: 1 addition & 0 deletions cirq-google/cirq_google/serialization/common_serializers_test.py
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Expand Up @@ -517,6 +517,7 @@ def test_wait_gate_multi_qubit():
(cirq.ISWAP**-0.5, np.pi / 4, 0),
(cirq.ISWAP**1.0, -np.pi / 2, 0),
(cirq.ISWAP**-1.0, np.pi / 2, 0),
(cirq.ISWAP_INV, np.pi / 2, 0),
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@dabacon dabacon Nov 7, 2021

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nit: move down below other ISWAP. Also considering adding another case like cirq.ISWAP_INV ** 0.5

(cirq.ISWAP**0.0, 0, 0),
(cirq.CZ, 0, np.pi),
(cirq.CZ**-1.0, 0, np.pi),
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