Kramers' theorem (English, name)
expansion: Kramers' theorem
Senses:
qualifier: quantum mechanics
glosses: A theorem stating that, for every energy eigenstate of a time-reversal symmetric system with half-integer total spin, there is another eigenstate with the same energy related by time-reversal. In other words, the degeneracy of every energy level is an even number if it has half-integer spin.
Forms: