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Broadcasting of correlation and its use in quantum information processingAuthors: Sourav Chatterjee, Anubhav Chaturvedi, Maharshi Ray,Indranil Chakrabarty Conference: 13th Asian Quantum Information Science Conference Date: 2013-08-25 Report no: IIIT/TR/2013/76 AbstractIt often happens in quantum information processing that we are given an entangled pair and asked to create more entangled pairs by using local quantum operations. This need arises from the fact that sometimes there is more priority on increasing number of participants in information processing scheme rather than on the efficiency of it. To address this we consider a two dimensional system and apply optimal universal quantum cloner to create more entangled pairs. Then we analyze the dependence of maximal fidelity of teleportation and super dense coding capacity on broadcasting and cloning fidelities. Since the amount of quantum correlation, namely entanglement and discord, between the participating subsystems play a vital role in the efficiency of information processing schemes, we further study the dependence of these quantum correlations, on broadcasting and cloning fidelities. Full paper: pdf Centre for Security, Theory and Algorithms |
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