Generation and coherent proprieties of entangled bi-modal field and its application

N. A. Enaki

This chapter examines the coherence properties of two modes of entangled photons and its application quantum communication and holography.It is proposed novel two-photon entangled sources which take into account the coherence and collective phenomena between the photon belonging to two different modes obtained in two-photon cooperative emission or Raman or lasing.The generation of the correlated bimodal entangled field in two-photon emission or Raman Pump, Stokes and anti-Stokes modes is proposed in the free space and cavity-induced emission.The application two-photon and Raman bimodal coherent field in communication and holography are given in accordance with the definition of amplitude and phase of such entangled states of light.At first, this method does not appear to be essentially different in comparison with the classical coherent state of information processing, but if we send this information in dispersive media, which separates the anti-Stokes and Stokes photons from coherent entanglement fields, the information is drastically destroyed, due to the quantum distribution of photons in the big number modes may be realized in the situation in which the mean value of strength of bimodal field tends to zero.The possibility of restoration of the signal after the propagation of the bimodal field through different fibers, we may restore the common square amplitude and phase.

Yong Wook Cheong, Jinhyoung Lee

Osamu Hirota, Genta Masada

Elena Starodub, N. A. Enaki

Abstract The restoration of the initial state in the Raman interaction of the two atoms with the quantified pump and Stokes (anti-Stokes) cavity modes is analytically obtained. For this the su (2) symmetry representation of the bimodal field and a system of two atoms in scattering interaction is proposed for the simplification of the problem. Using the proprieties of the generators su (2) algebra the exact non-stationary solution of the system of two atoms in interaction with the bimodal field is found, taking into consideration the initial disentangled state between the atomic and field superposition. It is demonstrated that after this collapse and revivals of the inversion of flying atoms in the processes of absorption and emission of the photons from Stokes and pump modes the system atoms and field becomes entangled. The conditions of the restoration of the initial state of the atom-field system were established as a function of the flying time through the resonator possible. A set of discrete flying time intervals for the restoration of the initial disentangled state was found.

Anna Napoli

N. A. Enaki

The application of coherence proprieties of bimodal field in quantum lithography and quantum holography is proposed. The coherence effect between the photons from Stokes and anti-Stokes waves generated in Raman lasing emission is established. The application of Stokes and anti-Stokes bimodal coherent field in lithography and holography are given in according with the definition of amplitude and phase of such entangled states of light. The optical scheme of holographic representation of object in bimodal representation is proposed.