Cooperative scattering effect between Stokes and anti-Stokes field stimulated by a stream of atoms

Coherence Proprieties of Entangled Bi-Modal Field and Its Application in Holography and Communication

“…An opposite conception appears in quantum optics in which it is proposed a lot of effects connected with quantum entanglement and coherent proprieties of bimodal field [19]. Here as we discuss in Section 1 we have the possibility to introduce another type of coherence [12,19,20], which appear not between the photons of the same mode, but between the biphotons from the ensemble of pairs of modes or correlations of photons belonging to scattered modes (bi-modes) 〈Ê rÊs 〉 6 ¼ 0. When the number of bi-modes with the same energy of the photons in the pair increase [21,22], the quantum fluctuations in each mode may achieve zero value 〈Ê r 〉 ¼ 〈Ê s 〉 ¼ 0.…”

“…The authors of the Refs. [10][11][12][13] have proposed to investigate the coherence which appears between undistinguished photon pairs and the possibility to generate such a pair in the two-photon quantum generators. The increased interest not only to two-photon generation, but to induce Raman microscopy in special medicine and biology opens the new perspective the coherent proprieties of bimodal fields.…”

“…These difficulties have been overcome by recent advances in coherent Raman scattering microscopy, which is based on either coherent anti-Stokes Raman scattering or stimulated Raman scattering [14,15]. Appear a possibility to use this type of coherent states of bimodal field [12,13], and to propose a new studies of vibrational aspects of molecules.…”

“…When the number of bi-modes with the same energy of the photons in the pair increase [21,22], the quantum fluctuations in each mode may achieve zero value 〈Ê r 〉 ¼ 〈Ê s 〉 ¼ 0. Following this conception, the similar coherence between the photons we introduced in the Raman emission processes [12,13,23]. In this case one photon from non-coherent driving field is absorbed (Stokes photon a s ) and other photon is generated (anti-Stokes b þ a ) 〈Ê rÊa 〉 6 ¼ 0, 〈Ê rÊs 〉 6 ¼ 0.…”

“…Let us study the interaction between the molecular systems and external Raman field prepared in the cooperative coherent process proposed in Refs. [12,13,30]. Following this Refs [19,23], we can introduced the bimodal operators the product of which oscillates with the frequency 2ω 0 near the vibration frequency of the molecules (or bio-molecules) Ω…”