Quantum electrodynamics in the squeezed vacuum state: Electron mass shift

摘要

Due to the non-vanishing average photon population of the squeezed vacuum state, finite corrections to the scattering matrix are obtained. The lowest-order contribution to the electron mass shift for a one-mode squeezed vacuum state is given by δm(Ω, s)/m = α(2/π)(Ω/m)~2sinh~2(s), where Ω and s stand for the mode frequency and the squeeze parameter and α for the fine-structure constant, respectively.