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Saberi, Hamed ; Mardoukhi, Yousof

Sequential quantum cloning under real-life conditions

Saberi, Hamed und Mardoukhi, Yousof (2012) Sequential quantum cloning under real-life conditions. Phys. Rev. A 85, 052323-052330.

Veröffentlichungsdatum dieses Volltextes: 04 Jun 2012 13:19
Artikel
DOI zum Zitieren dieses Dokuments: 10.5283/epub.24693


Zusammenfassung

We consider a sequential implementation of the optimal quantum cloning machine of Gisin and Massar and propose optimization protocols for experimental realization of such a quantum cloner subject to the real-life restrictions. We demonstrate how exploiting the matrix-product state (MPS) formalism and the ensuing variational optimization techniques reveals the intriguing algebraic structure of the ...

We consider a sequential implementation of the optimal quantum cloning machine of Gisin and Massar and propose optimization protocols for experimental realization of such a quantum cloner subject to the real-life restrictions. We demonstrate how exploiting the matrix-product state (MPS) formalism and the ensuing variational optimization techniques reveals the intriguing algebraic structure of the Gisin-Massar output of the cloning procedure and brings about significant improvements to the optimality of the sequential cloning prescription of Delgado et al. [Phys. Rev. Lett. 98, 150502 (2007)]. Our numerical results show that the orthodox paradigm of optimal quantum cloning can in practice be realized in a much more economical manner by utilizing a considerably lesser amount of informational and numerical resources than hitherto estimated. Instead of the previously predicted linear scaling of the required ancilla dimension D with the number of qubits n, our recipe allows a realization of such a sequential cloning setup with an experimentally manageable ancilla of dimension at most D = 3 up to n = 15 qubits. We also address satisfactorily the possibility of providing an optimal range of sequential ancilla-qubit interactions for optimal cloning of arbitrary states under realistic experimental circumstances when only a restricted class of such bipartite interactions can be engineered in practice.



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Details

DokumentenartArtikel
Titel eines Journals oder einer ZeitschriftPhys. Rev. A
Verlag:AMER PHYSICAL SOC
Ort der Veröffentlichung:COLLEGE PK
Band:85
Seitenbereich:052323-052330
Datum29 Mai 2012
InstitutionenPhysik > Institut für Theoretische Physik
Identifikationsnummer
WertTyp
10.1103/PhysRevA.85.052323DOI
Stichwörter / KeywordsEXPERIMENTAL REALIZATION; SINGLE PHOTONS;
Dewey-Dezimal-Klassifikation500 Naturwissenschaften und Mathematik > 530 Physik
StatusVeröffentlicht
BegutachtetJa, diese Version wurde begutachtet
An der Universität Regensburg entstandenZum Teil
URN der UB Regensburgurn:nbn:de:bvb:355-epub-246931
Dokumenten-ID24693

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