Single-photon devices in quantum cryptography

• Autorzy: Nakwaski W. , Sarzała R. P. , Wasiak M. , Czyszanowski T. , Maćkowiak P.
• Konferencja: Third International Conference on Solid State Crystals. Materials Science and Applications. ICSSC '2002 ; (14.10-18.10.2002 ; Zakopane, Poland)
• Języki publikacji: EN

Abstrakty

EN

Modern communication in absolute secrecy requires creation of new intrinsically secure quantum communication channels. It is particularly necessary during the first connection between two parties establishing then in assumed unconditional security the secret cryptographic key which is supposed to be used afterwards during normal information exchanging. This new emerging field of quantum information technology is based on na new type of light sources, in which numbers of emitted photons can be carefully controlled. Especially advantageous are sources of single photons emitted at strictly predetermined moments, so called single-photon devices. Then any possible eavesdropper activity will be followed by some unavoidable disturbance which alerts both communication parties to an event. In the present paper, the Purcell effect associated with enhancement of spontaneous emission coupled to a resonator is explained, methods used to produce streams of antibunched photons are given, mechanisms applied to control carrier injection into quantum dots are shown and some possible designs of single-photon devices are presented and described. These devices are based on taking advantage of both the Purcell effect and the atom-like energy spectrum of quantum dots.

Słowa kluczowe

EN

quantum cryptography; single-photon devices; communication systems; secrecy in communication

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2003
• Tom: Vol. 11, No. 2
• Strony: 127--132
• Opis fizyczny: Bibliogr. 47 poz.

Twórcy

autor

Nakwaski W.

• Institute of Physics, Technical University of Łódź, 219 Wólczańska Str., 93-005 Łódź, Poland
• Centre for High Technology Materials, University of New Mexico, Albuquerque, USA

autor

Sarzała R. P.

• Institute of Physics, Technical University of Łódź, 219 Wólczańska Str., 93-005 Łódź, Poland

autor

Wasiak M.

• Institute of Physics, Technical University of Łódź, 219 Wólczańska Str., 93-005 Łódź, Poland

autor

Czyszanowski T.

• Institute of Physics, Technical University of Łódź, 219 Wólczańska Str., 93-005 Łódź, Poland

autor

Maćkowiak P.

• Institute of Physics, Technical University of Łódź, 219 Wólczańska Str., 93-005 Łódź, Poland

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