Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
  Single-photon quantum key distribution in the presence of loss

Curty, M., & Moroder, T. (2007). Single-photon quantum key distribution in the presence of loss. PHYSICAL REVIEW A, 75(5): 052336. doi:10.1103/PhysRevA.75.052336.

Item is

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Curty, Marcos1, Autor           
Moroder, Tobias1, Autor           
Affiliations:
1Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364712              

Inhalt

einblenden:
ausblenden:
Schlagwörter: SEPARABILITY CRITERION; NONORTHOGONAL STATES; COHERENT STATES; CRYPTOGRAPHY; PROTOCOL; DIFFERENTIATE; SECURITY; THEOREM; PROOFOptics; Physics;
 Zusammenfassung: We investigate two-way and one-way single-photon quantum key distribution (QKD) protocols in the presence of loss introduced by the quantum channel. Our analysis is based on a simple precondition for secure QKD in each case. In particular, the legitimate users need to prove that there exists no separable state (in the case of two-way QKD), or that there exists no quantum state having a symmetric extension (one-way QKD), that is compatible with the available measurements results. We show that both criteria can be formulated as a convex optimization problem known as a semidefinite program, which can be efficiently solved. Moreover, we prove that the solution to the dual optimization corresponds to the evaluation of an optimal witness operator that belongs to the minimal verification set of them for the given two-way (or one-way) QKD protocol. A positive expectation value of this optimal witness operator states that no secret key can be distilled from the available measurements results. We apply such analysis to several well-known single-photon QKD protocols under losses.

Details

einblenden:
ausblenden:
Sprache(n): eng - English
 Datum: 2007
 Publikationsstatus: Online veröffentlicht
 Seiten: 13
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 000246890400074
DOI: 10.1103/PhysRevA.75.052336
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: PHYSICAL REVIEW A
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA : AMERICAN PHYSICAL SOC
Seiten: - Band / Heft: 75 (5) Artikelnummer: 052336 Start- / Endseite: - Identifikator: ISSN: 1050-2947