mindquantum.algorithm.nisq

Contents

mindquantum.algorithm.nisq#

Noisy Intermediate Scale Quantum (NISQ) algorithms.

In NISQ, the quantum qubits number and quantum circuit depth are very limited and the quantum gate fidelity is also limited.

Base Class#

API Name	Description
`Ansatz(name, ...)`	Base class for Ansatz.

Encoder#

API Name	Description
`IQPEncoding(n_feature)`	General IQP Encoding.
`QuantumNeuron(weight)`	A quantum neuron implementation based on RUS (Repeat-Until-Success) strategy, simulating classical neuron behavior and activation functions through quantum circuits.

Ansatz#

API Name	Description
`HardwareEfficientAnsatz(...)`	HardwareEfficientAnsatz is a kind of ansatz that can be easily implement on quantum chip.
`Max2SATAnsatz(clauses)`	The Max-2-SAT ansatz.
`MaxCutAnsatz(graph)`	The MaxCut ansatz.
`QubitUCCAnsatz([...])`	Qubit Unitary Coupled-Cluster (qUCC) ansatz class.
`SGAnsatz(nqubits, k)`	SG ansatz for 1D quantum systems.
`SGAnsatz2D(nqubits, k)`	SG ansatz for 2D quantum systems.
`StronglyEntangling(...)`	Strongly entangling ansatz.
`UCCAnsatz([...])`	The unitary coupled-cluster ansatz for molecular simulations.

Class	Images
`mindquantum.algorithm.nisq.RYLinear`
`mindquantum.algorithm.nisq.RYFull`
`mindquantum.algorithm.nisq.RYCascade`
`mindquantum.algorithm.nisq.RYRZFull`
`mindquantum.algorithm.nisq.PCHeaXYZ1F`
`mindquantum.algorithm.nisq.PCHeaXYZ2F`
`mindquantum.algorithm.nisq.ASWAP`

The following Ansatz come from paper Expressibility and entangling capability of parameterized quantum circuits for hybrid quantum-classical algorithms.

Class	Images
`mindquantum.algorithm.nisq.Ansatz1`
`mindquantum.algorithm.nisq.Ansatz2`
`mindquantum.algorithm.nisq.Ansatz3`
`mindquantum.algorithm.nisq.Ansatz4`
`mindquantum.algorithm.nisq.Ansatz5`
`mindquantum.algorithm.nisq.Ansatz6`
`mindquantum.algorithm.nisq.Ansatz7`
`mindquantum.algorithm.nisq.Ansatz8`
`mindquantum.algorithm.nisq.Ansatz9`
`mindquantum.algorithm.nisq.Ansatz10`
`mindquantum.algorithm.nisq.Ansatz11`
`mindquantum.algorithm.nisq.Ansatz12`
`mindquantum.algorithm.nisq.Ansatz13`
`mindquantum.algorithm.nisq.Ansatz14`
`mindquantum.algorithm.nisq.Ansatz15`
`mindquantum.algorithm.nisq.Ansatz16`
`mindquantum.algorithm.nisq.Ansatz17`
`mindquantum.algorithm.nisq.Ansatz18`
`mindquantum.algorithm.nisq.Ansatz19`

Generator#

API Name	Description
`generate_uccsd(...)`	Generate a uccsd quantum circuit based on a molecular data generated by Openfermion.
`quccsd_generator([...])`	Generate qubit-UCCSD (qUCCSD) ansatz using qubit-excitation operators.
`uccsd0_singlet_generator([...])`	Generate UCCSD operators using CCD0 ansatz for molecular systems.
`uccsd_singlet_generator(...)`	Create a singlet UCCSD generator for a system with n_electrons.

Functional#

API Name	Description
`Transform(operator)`	Class for transforms of fermionic and qubit operators.
`get_qubit_hamiltonian(mol)`	Get the qubit hamiltonian of a molecular data.
`uccsd_singlet_get_packed_amplitudes(...)`	Convert amplitudes for use with singlet UCCSD.
`ansatz_variance(...)`	Calculate the variance of the gradient of certain parameters of parameterized quantum circuit.
`get_reference_circuit(...)`	Get preparation circuit for reference circuit according to different methods.