qib.operator.ising_hamiltonian.IsingHamiltonian

class qib.operator.ising_hamiltonian.IsingHamiltonian(field: Field, J: float, h: float, g: float, convention: IsingConvention = IsingConvention.ISING_ZZ)

Bases: AbstractOperator

Ising Hamiltonian “J Z Z + h Z + g X” or “J X X + h X + g Z” with

• interaction parameter J

• longitudinal field strength h

• transverse field strength g

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.