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Circuit transformation utilities.
Modules
align_left module: An optimization pass that aligns gates to the left of the circuit.
align_right module: An optimization pass that aligns gates to the right of the circuit.
controlled_gate_decomposition module
convert_to_cz_and_single_gates module
cphase_to_fsim module
decompositions module: Utility methods related to optimizing quantum circuits.
drop_empty_moments module: An optimization pass that removes empty moments from a circuit.
drop_negligible module: An optimization pass that removes operations with tiny effects.
eject_phased_paulis module: Pushes 180 degree rotations around axes in the XY plane later in the circuit.
eject_z module: An optimization pass that pushes Z gates later and later in the circuit.
expand_composite module: An optimizer that expands composite operations via cirq.decompose.
merge_interactions module: An optimization pass that combines adjacent series of gates on two qubits.
merge_interactions_to_sqrt_iswap module: An optimization pass that combines adjacent series of gates on two qubits and
merge_single_qubit_gates module: An optimization pass that combines adjacent single-qubit rotations.
stratify module
synchronize_terminal_measurements module: An optimization pass to put as many measurements possible at the end.
three_qubit_decomposition module
two_qubit_decompositions module: Utility methods related to optimizing quantum circuits.
two_qubit_to_fsim module
two_qubit_to_sqrt_iswap module: Utility methods for decomposing two-qubit unitaries into sqrt-iSWAP gates.
Classes
class AlignLeft: Aligns gates to the left of the circuit.
class AlignRight: Aligns gates to the right of the circuit.
class ConvertToCzAndSingleGates: Attempts to convert strange multi-qubit gates into CZ and single qubit
class DropEmptyMoments: Removes empty moments from a circuit.
class DropNegligible: An optimization pass that removes operations with tiny effects.
class EjectPhasedPaulis: Pushes X, Y, and PhasedX gates towards the end of the circuit.
class EjectZ: Pushes Z gates towards the end of the circuit.
class ExpandComposite: An optimizer that expands composite operations via cirq.decompose.
class MergeInteractions: Combines series of adjacent one- and two-qubit, non-parametrized gates
class MergeInteractionsToSqrtIswap: Combines series of adjacent one- and two-qubit, non-parametrized gates
class MergeSingleQubitGates: Optimizes runs of adjacent unitary 1-qubit operations.
class SynchronizeTerminalMeasurements: Move measurements to the end of the circuit.
Functions
compute_cphase_exponents_for_fsim_decomposition(...): Returns intervals of CZPowGate exponents valid for FSim decomposition.
decompose_cphase_into_two_fsim(...): Decomposes CZPowGate into two FSimGates.
decompose_multi_controlled_rotation(...): Implements action of multi-controlled unitary gate.
decompose_multi_controlled_x(...): Implements action of multi-controlled Pauli X gate.
decompose_two_qubit_interaction_into_four_fsim_gates(...): Decomposes operations into an FSimGate near theta=pi/2, phi=0.
merge_single_qubit_gates_into_phased_x_z(...): Canonicalizes runs of single-qubit rotations in a circuit.
merge_single_qubit_gates_into_phxz(...): Canonicalizes runs of single-qubit rotations in a circuit.
single_qubit_matrix_to_gates(...): Implements a single-qubit operation with few gates.
single_qubit_matrix_to_pauli_rotations(...): Implements a single-qubit operation with few rotations.
single_qubit_matrix_to_phased_x_z(...): Implements a single-qubit operation with a PhasedX and Z gate.
single_qubit_matrix_to_phxz(...): Implements a single-qubit operation with a PhasedXZ gate.
single_qubit_op_to_framed_phase_form(...): Decomposes a 2x2 unitary M into U^-1 * diag(1, r) * U * diag(g, g).
stratified_circuit(...): Repacks avoiding simultaneous operations with different classes.
three_qubit_matrix_to_operations(...): Returns operations for a 3 qubit unitary.
two_qubit_matrix_to_diagonal_and_operations(...): Decomposes a 2-qubit unitary to a diagonal and the remaining operations.
two_qubit_matrix_to_operations(...): Decomposes a two-qubit operation into Z/XY/CZ gates.
two_qubit_matrix_to_sqrt_iswap_operations(...): Decomposes a two-qubit operation into ZPow/XPow/YPow/sqrt-iSWAP gates.