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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:42 |
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Conference: Bucharest University Faculty of Physics 2014 Meeting
Section: Theoretical Physics and Applied Mathematics
Title:
Quantum Chernoff bound as a measure of efficiency of quantum cloning for mixed states
Authors:
Iulia GHIU
Affiliation:
Centre for Advanced Quantum Physics, Department of Physics, University of Bucharest, P. O. Box MG-11, R-077125 Magurele
E-mail
iulia.ghiu@g.unibuc.ro
Keywords:
quantum cloning, distinguishability, quantum Chernoff bound
Abstract:
We investigate the efficiency of quantum cloning of N identical mixed qubits by employing a recently introduced measure of distinguishability of quantum states called quantum Chernoff bound. We evaluate the quantum Chernoff bound between the output clones generated by the cloning machine and the initial mixed qubit state. Our analysis is illustrated by performing numerical calculation of the quantum Chernoff bound for different scenarios that involves the number of initial qubits N and the number of output imperfect copies M.
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