New architecture of communication using the coherence states of stokes and anti-stokes photons
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ŢURCAN, Marina. New architecture of communication using the coherence states of stokes and anti-stokes photons. In: International Conference of Young Researchers . Ediția 8, 11-12 noiembrie 2010, Chişinău. Chişinău: Tipogr. Simbol-NP SRL, 2010, p. 89. ISBN 978-9975-9898-4-8..
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International Conference of Young Researchers
Ediția 8, 2010
Conferința "International Conference of Young Researchers "
Chişinău, Moldova, 11-12 noiembrie 2010

New architecture of communication using the coherence states of stokes and anti-stokes photons


Pag. 89-89

Ţurcan Marina
 
Institute of Applied Physics, Academy of Sciences of Moldova
 
Disponibil în IBN: 5 mai 2021


Rezumat

The current paper propose a novel architecture for quantum communication. The amplitude of a simple block of coherent Stokes and Anti-Stokes photons obtained after two-photon interaction in scattering lasing effects can be described by the square value of electrical vector A S (t) E E . In the quasi-classical limits the amplitude ( ) 0 t , has the same proprieties as amplitude of coherent laser field. In this approximation a nice idea is to use the modulation of this square amplitude for transmission of information. At first glance, it is observed that this method does not have a substantial differences in comparison with classical methods of information processing, but if we send this information in dispersive media, which separates Anti-Stokes and Stokes photons from coherent entanglement fields, the information is drastically destroyed, because A E and S E take zero values. The possibility of restoration of information on the square amplitudes ( ), 0 t is interesting problem of many particle coherent states, formed from blocks of Stokes and Anti-Stokes photons [1]. These studies are necessary because in a bi-boson lasing effect, the photon statistics depend on the statistics of the ignition field. Of course, the start up from vacuum fluctuations preserves the entanglement character of the generated Stokes and Anti-Stokes coherence state. This effect is very interesting in quantum communication. It is propose an interesting effect that takes into account the classical method of registration of information. As Π(t) plays the role of electromagnetic field intensity strength for the two- fields Stokes and Anti-Stokes, at the detector can be considered as a classical field described by ( ) ( ) cos[~ ( ) ] 0 0 t t t k k z a s , where 0 is the envelop of cooperative two-photon interaction in scattering processes. A large number of modes in the coherent states give as the possibilities of the increase the security of information storages in bimodal field. In this approximation, the classical information may be introduced in the amplitude ( ) 0 t , [2]. At the first glance one observes that such registration of information may have nothing to do with the traditional method. If the bi-boson pulses pass through a dispersive medium, the Anti-Stokes and Stokes photons from the field change their directions. Focusing the Anti-Stokes and Stokes photons into different optical fibers we are totally dropping the coherence among the photons. However, after a certain time interval, Anti-Stokes and Stokes photons from the field are mixed again, and we shall show that the coherence is restored. The possibility of experimental applications of coherence between the Stokes and anti- Stokes photons [3] obtained in superradiance and lasing effects in quantum communications and cryptography is proposed. It is demonstrated that these collective scattering phenomena between the Stokes and Anti-Stokes cavity modes take place due to information transfer between the photons of two fields.

Cuvinte-cheie
quantum communication, coherent laser field, scattering lasing effects, nonlinear processes.