Alladi Ramakrishnan Hall

Theoretical and Experimental Study of Quantum Steering

Tanumoy Pramanik

Telecom ParisTech, Paris

Quantum steering is a kind of quantum correlation which can not be explained ​by ​local hidden state model (LHS). ​Absence of LSH model of a quantum system, say B, indicates that the uncertainty relation for the system B will be violated with the help of its steerable part. But, these feature is not captured properly using coarse-grained uncertainty relations, e.g., Heisenberg uncertainty relation, entropic uncertainty relation. We have formulated fine-grained steering inequality for both discrete variable as well as continuous variable systems and overcome the limitation in coarse-grained steering inequalities. ​Monogamous nature of our steering inequality gives lower bound of secret key rate in one sided device independent way under individual attack. ​We also justify our work experimentally.