Implementing of Quantum Cloning with Spatially Separated Quantum Dot Spins

We propose some schemes for implementing optimal symmetric (asymmetric) 1 → 2 universal quantum cloning, optimal symmetric (asymmetric) 1 → 2 phase-covariant cloning, optimal symmetric 1 → 3 economical phase-covariant cloning and optimal symmetric 1 → 3 economical real state cloning with spatially s...

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Bibliographic Details
Published inInternational journal of theoretical physics Vol. 55; no. 7; pp. 3088 - 3096
Main Authors Wen, Jing-Ji, Yeon, Kyu-Hwang, Du, Xin, Lv, Jia, Wang, Ming, Wang, Hong-Fu, Zhang, Shou
Format Journal Article
LanguageEnglish
Published New York Springer US 01.07.2016
Subjects
Elementary Particles
Mathematical and Computational Physics
Physics
Physics and Astronomy
Quantum Field Theory
Quantum Physics
Theoretical
Cavity QED
Quantum dot
Quantum cloning
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Summary:We propose some schemes for implementing optimal symmetric (asymmetric) 1 → 2 universal quantum cloning, optimal symmetric (asymmetric) 1 → 2 phase-covariant cloning, optimal symmetric 1 → 3 economical phase-covariant cloning and optimal symmetric 1 → 3 economical real state cloning with spatially separated quantum dot spins by choosing the single-qubit rotation angles appropriately. The decoherences of the spontaneous emission of QDs, cavity decay and fiber loss are suppressed since the effective long-distance off-resonant interaction between two distant QDs is mediated by the vacuum fields of the fiber and cavity, and during the whole process no system is excited.
ISSN:0020-7748
1572-9575
DOI:10.1007/s10773-016-2939-5