qc2.ansatz.qiskit

Submodules

Classes

`LUCJ`	LUCJ ansatz using Unitary Coupled-Cluster with Jastrow factor.
`GateFabric`	Gate Fabric ansatz implementation for Qiskit.

Package Contents

class qc2.ansatz.qiskit.LUCJ(mol: pyscf.gto.Mole, active_space: Iterable | None = None, n_reps: int = 2, initial_state: qiskit.circuit.QuantumCircuit | None = None, name: str | None = 'LUCJ')[source]

Bases: qiskit.circuit.library.blueprintcircuit.BlueprintCircuit

LUCJ ansatz using Unitary Coupled-Cluster with Jastrow factor.

mol

active_space = None

_num_spatial_orbitals

_num_particles

_num_qubits

n_reps = 2

ccsd = None

property num_qubits: int: The number of qubits.

property num_spatial_orbitals: int: The number of spatial orbitals.

property num_particles: tuple[int, int]: The number of particles.

_run_scf()[source]: Runs a self-consistent field calculation.

_set_initial_state(initial_state: qiskit.circuit.QuantumCircuit | None) → None[source]

Sets the initial state circuit for the LUCJ ansatz.

Parameters:: initial_state – Initial state circuit (Hartree-Fock if None)

_check_configuration(raise_on_failure: bool = True) → bool[source]

Check if the configuration of the NLocal class is valid.

Parameters:

raise_on_failure – Whether to raise on failure.

Returns:

True, if the configuration is valid and the circuit can be constructed. Otherwise an ValueError is raised.

Raises:

ValueError – If the numbr fo qubit is not set.
ValueError – If the number of spatial orbitals is lower than the number of particles

_build()[source]

get_operator() → ffsim.UCJOpSpinBalanced[source]: ” Returns the LUCJ operator.

get_state(initial_state: numpy.ndarray | None = None) → numpy.ndarray[source]: Constructs and returns the LUCJ ansatz state.

class qc2.ansatz.qiskit.GateFabric(num_spatial_orbitals: int, num_particles: tuple, qubit_mapper: qiskit_nature.second_q.mappers.QubitMapper, initial_state: qiskit.circuit.QuantumCircuit | None = None, num_layers: int = 1, include_pi: bool = False, name: str | None = 'GateFabric')[source]