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Decomposes operations into an FSimGate near theta=pi/2, phi=0.
cirq.optimizers.decompose_two_qubit_interaction_into_four_fsim_gates( interaction: Union['cirq.Operation', 'cirq.Gate', np.ndarray, Any], *, fsim_gate: Union['cirq.FSimGate', 'cirq.ISwapPowGate'], qubits: Sequence['cirq.Qid'] = None ) -> "cirq.Circuit"
This decomposition is guaranteed to use exactly four of the given FSim gates. It works by decomposing into two B gates and then decomposing each B gate into two of the given FSim gate.
This decomposition only works for FSim gates with a theta (iswap angle) between 3/8π and 5/8π (i.e. within 22.5° of maximum strength) and a phi (cphase angle) between -π/4 and +π/4 (i.e. within 45° of minimum strength).
||The two qubit operation to synthesize. This can either be a cirq object (such as a gate, operation, or circuit) or a raw numpy array specifying the 4x4 unitary matrix.|
||The only two qubit gate that is permitted to appear in the output. Must satisfy 3/8π < phi < 5/8π and abs(theta) < pi/4.|
The qubits that the resulting operations should apply the
desired interaction to. If not set then defaults to either the
qubits of the given interaction (if it is a
|A list of operations implementing the desired two qubit unitary. The list will include four operations of the given fsim gate, various single qubit operations, and a global phase operation.|