Il giorno 16/mag/2013, alle ore 17.58, Paolo Giannozzi ha scritto: > On Wed, 2013-05-15 at 16:45 -0700, Fang Liu wrote: > >> In real space, the wavefunction is a real vector. > > only for k=0 or if there is inversion symmetry Isn't it enough to have time reversal symmetry? GS § Gabriele Sclauzero, EPFL SB ITP CSEA PH H2 462, Station 3, CH-1015 Lausanne