Operators

Reference documentation for all operator classes and factory functions in netket_foundation.operator.

Operator classes

The classes below are operators that specifically work with NetKet foundation. The netket_foundation.operator.ParametrizedOperator is the general operator used with foundation quantum states, while PauliStringsJax and FermionOperator are largely equivalent to their NetKet’s counterparts but have a few minor modifications necessary to build those operators within jit contexts. We will, over time, upstream those changes to NetKet.

netket_foundation.operator.ParametrizedOperator	Operator wrapper that evaluates a physical operator from parameters carried in the sample.
netket_foundation.operator.PauliStringsJax	Jax-compatible version of netket.operator.PauliStringsNumba.
netket_foundation.operator.FermionOperator2nd	A fermionic operator in \(2^{nd}\) quantization, using Numba for indexing.

Operator factories

Those commands below can be used to compose Hamiltonians that work with Foundation quantum states. They behave the same as those within NetKet, but return Foundation-specific classes.

netket_foundation.operator.sigmax	Pauli X operator acting on site i of the Hilbert space hi.
netket_foundation.operator.sigmay	Pauli Y operator acting on site i of the Hilbert space hi.
netket_foundation.operator.sigmaz	Pauli Z operator acting on site i of the Hilbert space hi.
netket_foundation.operator.create	Builds the fermion creation operator \(\hat{a}^\dagger\) acting on the site-th of the Hilbert space hilbert.
netket_foundation.operator.destroy	Builds the fermion destruction operator \(\hat{a}\) acting on the site-th of the Hilbert space hilbert.
netket_foundation.operator.number	Builds the number operator \(\hat{a}^\dagger\hat{a}\) acting on the site-th of the Hilbert space hilbert.