Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Multimode states in decoy-based quantum-key-distribution protocols

MPG-Autoren
/persons/resource/persons201129

Mauerer,  Wolfgang
Silberhorn Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201196

Silberhorn,  Christine
Silberhorn Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

Externe Ressourcen
Es sind keine externen Ressourcen hinterlegt
Volltexte (beschränkter Zugriff)
Für Ihren IP-Bereich sind aktuell keine Volltexte freigegeben.
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte in PuRe verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Helwig, W., Mauerer, W., & Silberhorn, C. (2009). Multimode states in decoy-based quantum-key-distribution protocols. PHYSICAL REVIEW A, 80(5): 052326. doi:10.1103/PhysRevA.80.052326.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002D-6B9D-2
Zusammenfassung
Every security analysis of quantum-key distribution (QKD) relies on a faithful modeling of the employed quantum states. Many photon sources, such as for instance a parametric down-conversion (PDC) source, require a multimode description but are usually only considered in a single-mode representation. In general, the important claim in decoy-based QKD protocols for indistinguishability between signal and decoy states does not hold for all sources. We derive bounds on the single-photon transmission probability and error rate for multimode states and apply these bounds to the output state of a PDC source. We observe two opposing effects on the secure key rate. First, the multimode structure of the state gives rise to a new attack that decreases the key rate. Second, more contributing modes change the photon number distribution from a thermal toward a Poissonian distribution, which increases the key rate.