Vacuum induced spin-1/2 Berry's phase.
We calculate the Berry phase of a spin-1/2 particle in a magnetic field considering the quantum nature of the field. The phase reduces to the standard Berry phase in the semiclassical limit and the eigenstate of the particle acquires a phase in the vacuum. We also show how to generate a vacuum induced Berry phase considering two quantized modes of the field which has an interesting physical interpretation.
Fuentes-Guridi
I
I
Optics Section, The Blackett Laboratory, Imperial College, London SW7 2BZ, United Kingdom.
Carollo
A
A
Bose
S
S
Vedral
V
V