Characterization of Gaussian operations and distillation of Gaussian states
نویسندگان
چکیده
منابع مشابه
Quantum key distillation from Gaussian states by Gaussian operations.
We study the secrecy properties of Gaussian states under Gaussian operations. Although such operations are useless for quantum distillation, we prove that it is possible to distill a secret key secure against any attack from sufficiently entangled Gaussian states with nonpositive partial transposition. Moreover, all such states allow for key distillation, when Eve is assumed to perform finite-s...
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Gerardo Adesso, Salvatore M. Giampaolo, and Fabrizio Illuminati* Dipartimento di Fisica “E. R. Caianiello,” Università degli Studi di Salerno, Via S. Allende, I-84081 Baronissi (SA), Salerno, Italy CNR-INFM Coherentia, Napoli, Italy; CNISM, Unità di Salerno, Salerno, Italy; and INFN, Sezione di Napoli-Gruppo Collegato di Salerno, Salerno, Italy Grup d’Informació Quàntica, Universitat Autónoma d...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2002
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.66.032316