Quantum gates

User-defined gates and gates from quimb

gates.CPHASE(phi, dtype=<class 'complex'>, sparse=False)

Construct a controlled phase gate for two qubits.

Parameters

• phi (double) -- Angle of rotation.

• sparse (bool, optional) -- Whether to construct a sparse operator.

Returns

C -- The controlled two-qubit gate operator.

Return type

immutable operator

class gates.GATES

Class to contain the various gates in quimb format

H

Hadamard gate

Type

matrix shape(2, 2)

NOT

Not gate

Type

matrix shape(2, 2)

CNOT

controlled not gate

Type

matrix shape(4, 4)

SWAP

swap gate

Type

matrix shape(4, 4)

CPHASE(phi)

returns the controlled phase matrix with phase phi

Type

function

gate_dict

dictionary of the format qiskit_gate_name : quimb_gate

Type

dictionary

gates.cphase_and_swap_cirq(ctrl, target, phase)

Combine the CPHASE gate with the SWAP operation, used for QFT algorithm. Input

crtl: cirq.devices.line_qubit.LineQubit

control qubit

target: cirq.devices.line_qubit.LineQubit

target qubit

phase: double

phase to apply in radiants

Return

cirq gate

gates.cphase_swap_qiskit(circuit, control, target, phase)

Apply to a quantum circuit circuit the cphase and swap gate. Acts in place.

Parameters

• circuit (Quantum Circuit) -- Qiskit quantum circuit

• control (int) -- Index of the control qubit for the controlled phase

• target (int) -- Index of the target qubit for the controlled phase

• phase (double) -- Phase to apply in the controlled phase in radiants

Returns

None -- Acts in place

Return type

None