UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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Conference: Bucharest University Faculty of Physics 2022 Meeting


Section: Theoretical Physics and Applied Mathematics


Title:
Imperfect quantum teleportation of two qubits by using a single entangled state


Authors:
Iulia GHIU (1), Catalina CIRNECI (1)


*
Affiliation:
1) University of Bucharest, Faculty of Physics, PO Box MG-11, R-077125, Magurele, Romania


E-mail
iulia.ghiu@g.unibuc.ro


Keywords:
entanglement, quantum teleportation


Abstract:
We analyze the quantum teleportation [1] of two qubits: one from Alice to Bob and the second one from Bob to Alice with the help of a single two-qubit entangled state. In order to generate imperfect copies of the quantum channel, one uses local optimal universal asymmetric cloning machines [2]. We evaluate the concurrence of the two imperfect clones of entangled state and find the conditions such that both states are simultaneously inseparable. Further, we compute the fidelity of teleportation for the two qubits.


References:

[1] C.H. Bennett, G. Brassard, C. Crepeau, R. Jozsa, A. Peres, W.K. Wootters, Phys. Rev. Lett. 70, 1895 (1993).

[2] I. Ghiu, Phys. Rev. A 67, 012323 (2003).



Acknowledgement:
This work was supported by a grant of the Romanian Ministry of Research, Innovation and Digitalization, CNCS-UEFISCDI, project number PN-III-P4-ID-PCE-2020-1142, within PNCDI III.