Complete Entanglement Witness for Quantum Teleportation
Ming-Jing Zhao, Shao-Ming Fei, Xianqing Li-Jost
TL;DR
This paper introduces a comprehensive set of linear entanglement witnesses using local observables, capable of detecting all entangled states that enhance quantum teleportation fidelity, with practical experimental conditions.
Contribution
It presents a complete entanglement witness framework that is both necessary and sufficient for identifying resources useful in quantum teleportation.
Findings
Detects all entangled resources improving teleportation fidelity
Provides experimentally feasible measurement conditions
Offers necessary and sufficient criteria for resource detection
Abstract
We propose a set of linear quantum entanglement witnesses constituted by local quantum-mechanical observables with each two possible measurement outcomes. These witnesses detect all the entangled resources which give rise to a better fidelity than separable states in quantum teleportation and present both sufficient and necessary conditions in experimentally detecting the useful resources for quantum teleportation.
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