Boundary Conditions as Dynamical Fields

Understand

The possibility of treating boundary conditions in terms of a bilocal dynamical field is formalized in terms of a boundary action.

• This allows for a simple path-integral perturbation theory approach to physical effects such as radiation from a time-dependent boundary.
• The nature of the action which governs the dynamics of the bilocal field is investigated for a limited case (which includes the Robin boundary conditions).