netket.exact.full_ed¶

netket.exact.full_ed(operator, *, compute_eigenvectors=False)[source]¶

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