netket.exact.full_ed

netket.exact.full_ed(operator, *, compute_eigenvectors=False)

Computes all eigenvalues and, optionally, eigenvectors of a Hermitian operator by full diagonalization.

Parameters

• operator (AbstractOperator) – NetKet operator to diagonalize.

• compute_eigenvectors (bool) – Whether or not to return the eigenvectors of the operator.

Returns

Either w or the tuple (w, v) depending on whether compute_eigenvectors is True.

Example

Test for 1D Ising chain with 8 sites.

>>> import netket as nk
>>> hi = nk.hilbert.Spin(s=1/2)**8
>>> hamiltonian = nk.operator.Ising(hi, h=1.0, graph=nk.graph.Chain(8))
>>> w = nk.exact.full_ed(hamiltonian)
>>> w.shape
(256,)