qib.operator.heisenberg_hamiltonian.HeisenbergHamiltonian

class qib.operator.heisenberg_hamiltonian.HeisenbergHamiltonian(field: Field, J: Sequence[float], h: Sequence[float])

Bases: AbstractOperator

Heisenberg Hamiltonian “J_1 X X + J_2 Y Y + J_3 Z Z + h_1 X + h_2 Y + h_3 Z”

• interaction parameters J

• longitudinal field strengths h

on a lattice.

Methods

as_matrix	Generate the (sparse) matrix representation of the Hamiltonian.
as_pauli_operator	Represent the Hamiltonian as Pauli operator.
fields	List of fields the Hamiltonian acts on.
is_hermitian	Whether the Hamiltonian is Hermitian.
is_unitary	Whether the Hamiltonian is unitary.

Attributes

nsites

Number of underlying lattice sites.

as_matrix()

Generate the (sparse) matrix representation of the Hamiltonian.

as_pauli_operator()

Represent the Hamiltonian as Pauli operator.

fields()

List of fields the Hamiltonian acts on.

is_hermitian()

Whether the Hamiltonian is Hermitian.

is_unitary()

Whether the Hamiltonian is unitary.

property nsites: int

Number of underlying lattice sites.