Physics

Prof. R. P. Singh
PRL Ahmedabad

Abstract :

Optical vortices also called light whirlpools are structures in light very similar to water whirlpools. Due to the helical wavefront, just as in water whirlpools, the light and consequently photons acquire orbital angular momentum that is different from spin angular momentum associated with circularly polarized light. We will discuss methods to generate these structures in the lab followed by their properties which are finding a variety of applications including the ones in classical and quantum communication.  

Entanglement being a great resource for quantum information processing, we will see how these structures can help in achieving different kinds of entanglements leading to duality of entanglement.