cirq.MergeInteractionsToSqrtIswap

THIS CLASS IS DEPRECATED.

Inherits From: PointOptimizer

cirq.MergeInteractionsToSqrtIswap(
    tolerance: float = 1e-08,
    *,
    required_sqrt_iswap_count: Optional[int] = None,
    use_sqrt_iswap_inv: bool = False,
    post_clean_up: Callable[[Sequence[ops.Operation]], ops.OP_TREE] = (lambda op_list: op_list)
) -> None

Used in the notebooks

Used in the tutorials

IT WILL BE REMOVED IN cirq v1.0.

Use cirq.optimize_for_target_gateset and cirq.SqrtIswapTargetGateset instead.

Combines series of adjacent one- and two-qubit, non-parametrized gates operating on a pair of qubits and replaces each series with the minimum number of SQRT_ISWAP gates.

See also: ``two_qubit_matrix_to_sqrt_iswap_operations``

tolerance A limit on the amount of absolute error introduced by the construction.
required_sqrt_iswap_count When specified, each merged group of two-qubit gates will be decomposed into exactly this many sqrt-iSWAP gates even if fewer is possible (maximum 3). Circuit optimization will raise a ValueError if this number is 2 or lower and synthesis of any set of merged interactions requires more.
use_sqrt_iswap_inv If True, optimizes circuits using SQRT_ISWAP_INV gates instead of SQRT_ISWAP.
post_clean_up This function is called on each set of optimized operations before they are put into the circuit to replace the old operations.

ValueError If required_sqrt_iswap_count is not one of the supported values 0, 1, 2, or 3.

Methods

optimization_at

View source

optimization_at(
    circuit: cirq.Circuit,
    index: int,
    op: cirq.Operation
) -> Optional[cirq.PointOptimizationSummary]

Describes how to change operations near the given location.

For example, this method could realize that the given operation is an X gate and that in the very next moment there is a Z gate. It would indicate that they should be combined into a Y gate by returning PointOptimizationSummary(clear_span=2, clear_qubits=op.qubits, new_operations=cirq.Y(op.qubits[0]))

Args
circuit The circuit to improve.
index The index of the moment with the operation to focus on.
op The operation to focus improvements upon.

Returns
A description of the optimization to perform, or else None if no change should be made.

optimize_circuit

View source

optimize_circuit(
    circuit: 'cirq.Circuit'
)

__call__

View source

__call__(
    circuit: 'cirq.Circuit'
)

Call self as a function.