Functional evolution of scalar fields in bounded one-dimensional regions
arXiv:1611.09603 · doi:10.1088/1361-6382/aa5e8c
Abstract
We discuss the unitarity of the quantum evolution between arbitrary Cauchy surfaces of a 1+1 dimensional free scalar field defined on a bounded spatial region and subject to several types of boundary conditions including Dirichlet, Neumann and Robin.
Some typos fixed, two references added