TwoQubitReduction

class TwoQubitReduction(num_particles)

Bases: qiskit.opflow.converters.converter_base.ConverterBase

Two qubit reduction converter which eliminates the central and last qubit in a list of Pauli that has diagonal operators (Z,I) at those positions.

Chemistry specific method: It can be used to taper two qubits in parity and binary-tree mapped fermionic Hamiltonians when the spin orbitals are ordered in two spin sectors, (block spin order) according to the number of particles in the system.

Parameters

num_particles (Union[int, List[int], Tuple[int, int]]) – number of particles, if it is a list, the first number is alpha and the second number if beta.

Methods Defined Here

convert

Converts the Operator to tapered one by Z2 symmetries.