quantax.symmetry.SpinInverse

quantax.symmetry.SpinInverse(eigval: int = 1) → Symmetry

Spin inverse symmetry for both spin-1/2 and spinful fermion systems. In spin systems it flips all spins. In spinful fermion systems it exchanges particles between spin-up and spin-down sites.

Parameters:

eigval –

An integer specifying the symmetry sector. The meaning of each number is

1: Eigenvalue 1 after spin inversion

0: No spin inversion

-1: Eigenvalue -1 after spin inversion