Faculty of Physics - University of Bucharest

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2024-11-22 1:52

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Conference: Bucharest University Faculty of Physics 2003 Meeting

Section: Statistical Physics and Quantum Mechanics Seminar

Title:

Broadcasting of Entanglement

Authors:

Iulia Ghiu

Affiliation:

Department of Physics, University of Bucharest

E-mail

Keywords:

Abstract:

Cloning is a process that shows the significant differences between classical and quantum information processing. In contrast to the classical case, when one can generate as many copies as one wishes of a system, Wootters and Zurek have shown that no machine exists that can produce two perfect copies of an unknown quantum state (no-cloning theorem). An interesting application of quantum cloning is broadcasting of entanglement. In this process, the entanglement originally shared by two observers is broadcast into two identical entangled states by using local 1->2 optimal isotropic symmetric cloning machine. Now we analyze the broadcasting of entanglement considering local optimal isotropic asymmetric cloning machines and prove that the two output entangled states are different, but have the same fidelity. We show that the inseparability is optimally broadcast when symmetric cloners are applied.