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SM ISO690:2012 ŢURCAN, Marina. New architecture of communication using the coherence states of stokes and antistokes photons. In: International Conference of Young Researchers . Ediția 8, 1112 noiembrie 2010, Chişinău. Chişinău: Tipogr. SimbolNP SRL, 2010, p. 89. ISBN 9789975989848.. 
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International Conference of Young Researchers Ediția 8, 2010 

Conferința "International Conference of Young Researchers " Chişinău, Moldova, 1112 noiembrie 2010  


Pag. 8989  


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The current paper propose a novel architecture for quantum communication. The amplitude of a simple block of coherent Stokes and AntiStokes photons obtained after twophoton interaction in scattering lasing effects can be described by the square value of electrical vector A S (t) E E . In the quasiclassical 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 AntiStokes 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 AntiStokes photons [1]. These studies are necessary because in a biboson 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 AntiStokes 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 AntiStokes, 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 twophoton 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 biboson pulses pass through a dispersive medium, the AntiStokes and Stokes photons from the field change their directions. Focusing the AntiStokes and Stokes photons into different optical fibers we are totally dropping the coherence among the photons. However, after a certain time interval, AntiStokes 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 AntiStokes cavity modes take place due to information transfer between the photons of two fields. 

Cuvintecheie quantum communication, coherent laser field, scattering lasing effects, nonlinear processes. 

