Time-reversal symmetry (TRS) of electrons is associated with an anti-unitary operator with T 2 = − 1 . which induces Kramers degeneracy and plays an important role in realizing the quantum spin Hall effect (QSHE). By contrast. TRS of photons is described by T b 2 = 1 . https://qnvzwdpf45e9sh.timeblog.net/70688063/acute-effects-of-an-instructional-movie-on-drop-jump-performance-and-lower-limb-kinematic-and-kinetic-variables