def __init__(
self,
*,
atol: float = 1e-8,
required_sqrt_iswap_count: Optional[int] = None,
use_sqrt_iswap_inv: bool = False,
):
"""Initializes `cirq.SqrtIswapTargetGateset`
Args:
atol: A limit on the amount of absolute error introduced by the decomposition.
required_sqrt_iswap_count: When specified, the `decompose_to_target_gateset` will
decompose each operation into exactly this many sqrt-iSWAP gates even if fewer is
possible (maximum 3). A ValueError will be raised if this number is 2 or lower and
synthesis of the operation requires more.
use_sqrt_iswap_inv: If True, `cirq.SQRT_ISWAP_INV` is used as part of the gateset,
instead of `cirq.SQRT_ISWAP`.
Raises:
ValueError: If `required_sqrt_iswap_count` is specified and is not 0, 1, 2, or 3.
"""
if required_sqrt_iswap_count is not None and not 0 <= required_sqrt_iswap_count <= 3:
raise ValueError('the argument `required_sqrt_iswap_count` must be 0, 1, 2, or 3.')
super().__init__(
ops.SQRT_ISWAP_INV if use_sqrt_iswap_inv else ops.SQRT_ISWAP,
ops.MeasurementGate,
ops.AnyUnitaryGateFamily(1),
name='SqrtIswapInvTargetGateset' if use_sqrt_iswap_inv else 'SqrtIswapTargetGateset',
)
self.atol = atol
self.required_sqrt_iswap_count = required_sqrt_iswap_count
self.use_sqrt_iswap_inv = use_sqrt_iswap_inv
def __init__(self, *, atol: float = 1e-8, allow_partial_czs: bool = False) -> None:
"""Initializes CZTargetGateset
Args:
atol: A limit on the amount of absolute error introduced by the decomposition.
allow_partial_czs: If set, all powers of the form `cirq.CZ**t`, and not just
`cirq.CZ`, are part of this gateset.
"""
super().__init__(
ops.CZPowGate if allow_partial_czs else ops.CZ,
ops.MeasurementGate,
ops.AnyUnitaryGateFamily(1),
name='CZPowTargetGateset' if allow_partial_czs else 'CZTargetGateset',
)
self.atol = atol
self.allow_partial_czs = allow_partial_czs
def __init__(self,
ignore_failures: bool = False,
allow_partial_czs: bool = False) -> None:
"""Inits ConvertToCzAndSingleGates.
Args:
ignore_failures: If set, gates that fail to convert are forwarded
unchanged. If not set, conversion failures raise a TypeError.
allow_partial_czs: If set, the decomposition is permitted to use
gates of the form `cirq.CZ**t`, instead of only `cirq.CZ`.
"""
super().__init__()
self.ignore_failures = ignore_failures
self.allow_partial_czs = allow_partial_czs
self.gateset = ops.Gateset(
ops.CZPowGate if allow_partial_czs else ops.CZ,
ops.MeasurementGate,
ops.AnyUnitaryGateFamily(1),
)