Multipartite Einstein-Podolsky-Rosen Steering and Quantum Information Processing

Abstract

Einstein-Podolsky-Rosen (EPR) steering which is an intermediate type of quantum correlation sitting between entanglement and Bell nonlocality allows two parties to establish quantum secret key even if the measurement devices of one party are untrusted Extending the concept of bipartite EPR steering here we describe the characteristics of multipartite EPR steering and then propose an experimentally feasible method to detect the multipartite EPR steerability Our formalism has high noise tolerance and it can be used to certify the steerability for a large class of multipartite quantum entangled systems In addition combining with the above method of detecting the multipartite EPR steerability we develop an efficient way to ensure the security of multiparty quantum secret sharing in the presence of uncharacterized measurement apparatuses or parties which provides potential applications to the secure quantum information tasks

Date of Award	2016 Jan 21
Original language	English
Supervisor	Che-Ming Li (Supervisor)