qat.fermion.circuits.make_ldca_circ

qat.fermion.circuits.make_ldca_circ(nb_fermionic_modes: int, ncycles: int, eigstate_ind: int | None = 0, slater: bool | None = False) → Circuit

Construct a LDCA circuit (see article by P. Dallaire-Demers et al. (2019)), applying ncycles layers of matchgates routines on nb_fermionic_modes qubits.

Parameters:

• nb_fermionic_modes (int) – Number of qubits.

• ncycles (int) – Number of LDCA cycles.

• eigstate_ind (int, optional) – Eigenstate index. Defaults to 0.

• slater (Optional[bool]) – Whether to only include excitation-preserving rotations. Defaults to False.

Returns:

Circuit