quantax.symmetry.Z2Inversion

quantax.symmetry.Z2Inversion(eigval: int = 1) → Symmetry

The Z2 inversion symmetry. This represents the spin flip in spin-1/2 systems, and the particle-hole symmetry in fermionic systems.

Parameters:

eigval –

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

• 1: Eigenvalue 1 after Z2 inversion

• 0: No Z2 inversion symmetry

• -1: Eigenvalue -1 after Z2 inversion