Klein-Gordon equations with homogeneous time-dependent electric fields
arXiv:1705.09514 · doi:10.1007/s11565-017-0294-y
Abstract
We consider a system associated to Klein-Gordon equations with homogeneous time-dependent electric fields. The upper and lower boundaries of a time-evolution propagator for this system were proven by Veselić in 1991 for electric fields that are independent of time. We extend this result to time-dependent electric fields.