netket_foundation.operator.create

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netket_foundation.operator.create#

netket_foundation.operator.create(hilbert, site, sz=None, cutoff=1e-10, dtype=None)[source]#

Builds the fermion creation operator \(\hat{a}^\dagger\) acting on the site-th of the Hilbert space hilbert.

Parameters:

  • hilbert (SpinOrbitalFermions) – The hilbert space

  • site (int) – the site on which this operator acts

  • sz (int | None) – spin projection quantum number. This is the eigenvalue of the corresponding spin-Z Pauli operator (e.g. sz = ±1 for a spin-1/2, sz ∈ [-2, -1, 1, 2] for a spin-3/2 and in general sz ∈ [-2S, -2S + 2, … 2S-2, 2S] for a spin-S )

  • dtype (Union[None, str, type[Any], dtype, _SupportsDType]) – The datatype to use for the matrix elements.

  • cutoff (float)

Returns:

The resulting FermionOperator2nd

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