QIQT 23 | Ashok Kumar - Encoding information in spatial correlations of bright entangled ligh

Spatial quantum correlations promise to enhance the sensitivity of quantum imaging and quantum sensing, along with applications in quantum information processing and quantum communication. We will discuss spatial quantum correlation properties of bright entangled light beams generated with a four-wave mixing process in a hot rubidium vapour cell. We will show that the spatial quantum correlations can demonstrate the famous Einstein-Podolsky-Rosen (EPR) paradox. After leading the EPR paradox, we will highlight that entangled beams are not only crucial for fundamental sciences, but also useful to encode information in the distribution of the spatial correlations of entangled twin beams. Such encoded information can only be extracted through joint spatial measurements of the twin beams and not through individual beam measurements, and the temporal quantum correlations are not modified.