openfermion.transforms.inverse_fourier_transform

Apply inverse Fourier transform to change hamiltonian in plane wave dual basis.

Main aliases

openfermion.transforms.inverse_fourier_transform(
    hamiltonian, grid, spinless
)

$a^\dagger_v = \sqrt{1/N} \sum_m {c^\dagger_m \exp(i k_v r_m)} a_v = \sqrt{1/N} \sum_m {c_m \exp(-i k_v r_m)}$

Args
`hamiltonian`	`FermionOperator` The hamiltonian in plane wave dual basis.
`grid`	`Grid` The discretization to use.
`spinless`	`bool` Whether to use the spinless model or not.

Args

hamiltonian

FermionOperator

The hamiltonian in plane wave dual basis.

grid

Grid

The discretization to use.

spinless

bool

Whether to use the spinless model or not.

Returns
`FermionOperator`	The inverse-fourier-transformed hamiltonian.

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Last updated 2025-06-06 UTC.