Theoretical Physics Colloquium
Strongly interacting photons in one-dimensional free space
by Dr. Dibyendu Roy (Los Alamos National Laboratory, USA)
Tuesday, July 8, 2014
from
to
(Asia/Kolkata)
at Colaba Campus ( AG69 )
at Colaba Campus ( AG69 )
Description |
Photons are neutral particles and do not interact with each other. An effective photon-photon interaction can be created by employing light-matter interactions in a nonlinear optical medium. Nonlinear photon-photon interaction at single-photon level is essential for photonic devices and photonic quantum gates. However single-photon nonlinearities are tiny because the electric field of a photon is many orders of magnitude smaller than the binding field of electrons in matter. Recently a new approach has been demonstrated to create strong photon-photon interactions by coupling a bare two-level emitter with photons in an open one-dimensional (1D) waveguide without using an optical cavity. In this talk I will first introduce the basics of strongly interacting photons in 1D free space. Next I will explain a theoretical method to study correlated photons in such physical systems. Finally I will discuss some proposed all-optical quantum devices along this direction and their current experimental status. |