Experimental demonstration and investigation of entanglement 01/01/2025

Physics

The superposition principle applies to several physical problems. When the problem involves two or more degrees of freedom, the notion of entanglement emerges, as elucidated by Erwin Schroedinger in 1935. Quantum information processing, quantum communication, and quantum computation, have their basis on entanglement, a consequence of the superposition principle. An even more elementary consequence of the superposition principle, as seen in optics

experiments, is the formation of fringes that are readily observed on a screen. An instance being, Newton’s rings of Sir Isaac Newton’s fame, observed since 1664. Both entanglement and fringe formation are consequences of the superposition principle. Is there a connection? A table top experiment recently carried out at the Applied and Adaptive Optics lab, Department of Physics IIST, demonstrated this link, that is : fringe movement under some considerations, implies Polarisation-spatial entanglement. The experiment reported maximal two qubit entanglement.