Zobrazeno 1 - 10
of 713
pro vyhledávání: '"Fratini F"'
Autor:
Nguyen, H. A, Grange, T., Reznychenko, B, Yeo, I., De Assis, P. -L, Tumanov, D, Fratini, F, Malik, N, Dupuy, E, Gregersen, N, Auffèves, A, Gérard, J. -M, Claudon, J, Poizat, J. -Ph
Publikováno v:
Phys. Rev. B 97, 201106 (2018)
Optical non-linearities usually appear for large intensities, but discrete transitions allow for giant non-linearities operating at the single photon level. This has been demonstrated in the last decade for a single optical mode with cold atomic gase
Externí odkaz:
http://arxiv.org/abs/1705.04056
Publikováno v:
EuroPhys. Lett. 107, 13002 (2014)
In electron scattering, the target form factors contribute significantly to the diffraction pattern and carry information on the target electromagnetic charge distribution. Here we show that the presence of electromagnetic radiation, as intense as cu
Externí odkaz:
http://arxiv.org/abs/1507.07135
Autor:
Fratini, F., Mascarenhas, E., Safari, L., Poizat, J-Ph., Valente, D., Auffèves, A., Gerace, D., Santos, M. F.
Publikováno v:
Phys. Rev. Lett. 113, 243601 (2014)
Optical transport represents a natural route towards fast communications, and it is currently used in large scale data transfer. The progressive miniaturization of devices for information processing calls for the microscopic tailoring of light transp
Externí odkaz:
http://arxiv.org/abs/1410.5972
Atomic form factors are widely used for the characterization of targets and specimens, from crystallography to biology. By using recent mathematical results, here we derive an analytical expression for the atomic form factor within the independent pa
Externí odkaz:
http://arxiv.org/abs/1409.0110
Publikováno v:
The European Physical Journal D 68, 27 (2014)
We study the absorption and dispersion properties of a weak tunable probe field in a four-level Y-type atomic system driven by two strong laser (coupling) fields within the framework of density matrix formalism. It is found that the probe absorption
Externí odkaz:
http://arxiv.org/abs/1312.3899
Publikováno v:
Phys. Rev. A 86, 042509 (2012)
The two-photon decay in hydrogen-like ions is investigated within the framework of second order perturbation theory and Dirac's relativistic equation. Special attention is paid to the angular correlation of the emitted photons as well as to the degre
Externí odkaz:
http://arxiv.org/abs/1208.3169
Autor:
Fratini, F., Hayrapetyan, A. G.
In a paper of us, it is showed that Density Matrices do not provide a complete description of ensembles of states in quantum mechanics, since they lack measurable information concerning the preparation of the ensembles. Bodor and Di\'osi have later p
Externí odkaz:
http://arxiv.org/abs/1204.1071
Relativistic total cross section and angular distribution for Rayleigh scattering by atomic hydrogen
Publikováno v:
Phys. Rev. A 85, 043406 (2012)
We study the total cross section and angular distribution in Rayleigh scattering by hydrogen atom in the ground state, within the framework of Dirac relativistic equation and second-order perturbation theory. The relativistic states used for the calc
Externí odkaz:
http://arxiv.org/abs/1203.1470
Autor:
Surzhykov, A., Volotka, A., Fratini, F., Santos, J. P., Indelicato, P., Plunien, G., Stöhlker, Th., Fritzsche, S.
Publikováno v:
Physical Review A 81, 042510 (2010)
The two-photon decay of heavy, helium-like ions is investigated based on second-order perturbation theory and Dirac's relativistic equation. Special attention has been paid to the angular emission of the two photons, i.e., how the angular correlation
Externí odkaz:
http://arxiv.org/abs/1106.5281
A formalism to evaluate the Sivers function, developed for calculations in constituent quark models, is applied to the Isgur-Karl model. A non-vanishing Sivers asymmetry, with opposite signs for the u and d flavor, is found; the Burkardt sum rule is
Externí odkaz:
http://arxiv.org/abs/0807.4821