Circuit Library

Circuit Library (qiskit.circuit.library)

Standard Gates

Barrier(num_qubits)

Barrier instruction.

C3XGate([angle, label, ctrl_state])

The 3-qubit controlled X gate.

C4XGate([label, ctrl_state])

The 4-qubit controlled X gate.

CCXGate([label, ctrl_state])

CCX gate, also known as Toffoli gate.

CHGate([label, ctrl_state])

Controlled-Hadamard gate.

CRXGate(theta[, label, ctrl_state])

Controlled-RX gate.

CRYGate(theta[, label, ctrl_state])

Controlled-RY gate.

CRZGate(theta[, label, ctrl_state])

Controlled-RZ gate.

CSwapGate([label, ctrl_state])

Controlled-X gate.

CU1Gate(theta[, label, ctrl_state])

Controlled-U1 gate.

CU3Gate(theta, phi, lam[, label, ctrl_state])

Controlled-U3 gate (3-parameter two-qubit gate).

CXGate([ctrl_state, label])

Controlled-X gate.

CYGate([label, ctrl_state])

Controlled-Y gate.

CZGate([label, ctrl_state])

Controlled-Z gate.

HGate([label])

Single-qubit Hadamard gate.

IGate([label])

Identity gate.

Measure()

Quantum measurement in the computational basis.

MSGate(num_qubits, theta, *[, n_qubits, label])

Global Mølmer–Sørensen gate.

RCCXGate([label])

The simplified Toffoli gate, also referred to as Margolus gate.

RC3XGate([label])

The simplified 3-controlled Toffoli gate.

Reset()

Qubit reset.

RXGate(theta[, label])

Single-qubit rotation about the X axis.

RXXGate(theta)

A parameteric 2-qubit \(X \otimes X\) interaction (rotation about XX).

RYGate(theta[, label])

Single-qubit rotation about the Y axis.

RYYGate(theta)

A parameteric 2-qubit \(Y \otimes Y\) interaction (rotation about YY).

RZGate(phi[, label])

Single-qubit rotation about the Z axis.

RZZGate(theta)

A parameteric 2-qubit \(Z \otimes Z\) interaction (rotation about ZZ).

RZXGate(theta)

A parameteric 2-qubit \(Z \otimes X\) interaction (rotation about ZX).

SGate([label])

Single qubit S gate (Z**0.5).

SdgGate([label])

Single qubit S-adjoint gate (~Z**0.5).

SwapGate([label])

The SWAP gate.

iSwapGate()

iSWAP gate.

DCXGate()

Double-CNOT gate.

TdgGate([label])

Single qubit T-adjoint gate (~Z**0.25).

U1Gate(theta[, label])

Single-qubit rotation about the Z axis.

U2Gate(phi, lam[, label])

Single-qubit rotation about the X+Z axis.

U3Gate(theta, phi, lam[, label])

Generic single-qubit rotation gate with 3 Euler angles.

XGate([label])

The single-qubit Pauli-X gate (\(\sigma_x\)).

YGate([label])

The single-qubit Pauli-Y gate (\(\sigma_y\)).

ZGate([label])

The single-qubit Pauli-Z gate (\(\sigma_z\)).

Generalized Gates

Diagonal(diag)

Diagonal circuit.

MCMT(gate, num_ctrl_qubits, num_target_qubits)

The multi-controlled multi-target gate, for an arbitrary singly controlled target gate.

MCMTVChain(gate, num_ctrl_qubits, …)

The MCMT implementation using the CCX V-chain.

Permutation(num_qubits[, pattern, seed])

An n_qubit circuit that permutes qubits.

GMS(num_qubits, theta)

Global Mølmer–Sørensen gate.

Boolean Logic Circuits

AND(num_variable_qubits[, flags, mcx_mode])

A circuit implementing the logical AND operation on a number of qubits.

OR(num_variable_qubits[, flags, mcx_mode])

A circuit implementing the logical OR operation on a number of qubits.

XOR(num_qubits[, amount, seed])

An n_qubit circuit for bitwise xor-ing the input with some integer amount.

InnerProduct(num_qubits)

An n_qubit circuit that computes the inner product of two registers.

Basis Change Circuits

QFT([num_qubits, approximation_degree, …])

Quantum Fourier Transform Circuit.

Arithmetic Circuits

Functional Pauli Rotations

FunctionalPauliRotations([num_state_qubits, …])

Base class for functional Pauli rotations.

LinearPauliRotations([num_state_qubits, …])

Linearly-controlled X, Y or Z rotation.

PolynomialPauliRotations([num_state_qubits, …])

A circuit implementing polynomial Pauli rotations.

PiecewiseLinearPauliRotations([…])

Piecewise-linearly-controlled Pauli rotations.

Adders

WeightedAdder([num_state_qubits, weights, name])

A circuit to compute the weighted sum of qubit registers.

Comparators

IntegerComparator([num_state_qubits, value, …])

Integer Comparator.

Particular Quantum Circuits

FourierChecking(f, g)

Fourier checking circuit.

GraphState(adjacency_matrix)

Circuit to prepare a graph state.

HiddenLinearFunction(adjacency_matrix)

Circuit to solve the hidden linear function problem.

IQP(interactions)

Instantaneous quantum polynomial (IQP) circuit.

QuantumVolume(num_qubits[, depth, seed, …])

A quantum volume model circuit.

N-local circuits

NLocal([num_qubits, rotation_blocks, …])

The n-local circuit class.

TwoLocal([num_qubits, rotation_blocks, …])

The two-local circuit.

RealAmplitudes([num_qubits, entanglement, …])

The RealAmplitudes 2-local circuit.

EfficientSU2([num_qubits, su2_gates, …])

The hardware efficient SU(2) 2-local circuit.

ExcitationPreserving([num_qubits, mode, …])

The heurisitic excitation-preserving wave function ansatz.

Data encoding circuits

PauliFeatureMap([feature_dimension, reps, …])

The Pauli Expansion circuit.

ZFeatureMap(feature_dimension[, reps, …])

The first order Pauli Z-evolution circuit.

ZZFeatureMap(feature_dimension[, reps, …])

Second-order Pauli-Z evolution circuit.