Quantized Klein-Gordon Field in a Cavity of Variable Length

By M. Razavy, J. Terning (University of Alberta). 1985.
Published in Lett. Nuovo Cim. 41 ( 1984) 561-566.

An effective Hamiltonian is found for the Klein-Gordon field enclosed in a one-dimensional cavity with a moving wall. From this Hamiltonian the number of particles created from the vacuum by the motion of the boundary is determined.