GTx (United States)

The Pairing Rulebook of the Brillouin Klein Bottle. Mirror circle, forbidden s-wave, and half-integer phase winding: the sector selections of Bogoliubov–de Gennes theory on non-orientable momentum space, with the Klein transform as the native mode machinery

A Brillouin zone can be a Klein bottle: under Z2 gauge fields the algebra of crystal symmetries becomes projective, a nonsymmorphic glide reflection appears in momentum space, and the fundamental domain is a Klein bottle instead of a torus — the experimentally realized Brillouin...