Boundary dynamics and multiple reflection expansion for Robin boundary conditions
Boundary dynamics and multiple reflection expansion for Robin boundary conditions
In the presence of a boundary interaction, Neumann boundary conditions should be modified to contain a function S of the boundary fields: $({\ensuremath{\nabla}}_{N}+S)\ensuremath{\varphi}=0.$ Information on quantum boundary dynamics is then encoded in the S-dependent part of the effective action. In the present paper we extend the multiple reflection expansion method …