Quantifying Quantum Teleportation and Its applications

Abstract

Quantum teleportation is a method for utilizing quantum measurements and the maximally entangled Einstein-Podolsky-Rosen (EPR) pair to transmit an unknown quantum state which provides the power crucial for quantum computation and uantum information It is well known that all entangled states demonstrate so-called “nonclassical teleportation” that cannot be simulated by the seminal classical measure-prepare strategy Herein we reveal that not all nonclassical teleportations are truly quantum-mechanical Rather there exists a stronger classical-teleportation model which includes the measure-prepare procedure for teleportation as a special case that can describe certain nonclassical teleportations Invalidating such a classical model implies genuine quantum teleportation wherein both the pair state and the measurement are truly quantum-mechanical We show that PR steering empowers genuine quantum teleportations rather than entanglement Our results show a compelling benchmark for implementing quantum-information processing where EPR pairs are indispensable such as remote state preparation and general teleportation for composite quantum systems

Date of Award	2019
Original language	English
Supervisor	Che-Ming Li (Supervisor)