On the basis of general theoretical results developed previously in JETP 112, 246 (2011) we analyze atomic polarization created by weak monochromatic light an optically thick, dense and cold ensemble. We show that amplitude averaged over a uniform random distribution decreases exponentially beyond boundary regions. The phase this increases linearly with increasing penetration into medium. these grounds, determine numerically wavelength medium, its extinction coefficient, complex refractive...

On the basis of general theoretical results developed previously [I. M. Sokolov et al., J. Exp. Theor. Phys. 112, 246 (2011)], we analyze spontaneous decay a single atom inside cold atomic clouds under conditions when averaged interatomic separation is less than or comparable with wavelength quasiresonant radiation. Beyond dynamics shifts resonance as well distortion spectral shape transition.

On the basis of general theoretical results developed previously in [JETP 112, 246 (2011)], we analyze reflection quasiresonant light from a plane surface dense and disordered ensemble motionless point scatters. Angle distribution scattered is calculated both for $s$ $p$ polarizations probe radiation. The ratio between coherent incoherent (diffuse) components calculated. We contributions scatters located at different distances determine on this background thickness layer responsible...

On the basis of a quantum microscopic approach we study dynamics afterglow dilute Gaussian atomic ensemble excited by pulsed radiation. Taking into account vector nature electromagnetic field analyze in detail angular and polarization distribution single-photon superradiance such an ensemble. The dependence on length pulse its carrier frequency as well size shape clouds is studied. We show that there substantial superradiant emission direction fluorescence. observe essential peculiarities...

On the basis of our general theoretical results developed previously in JETP 112, 246 (2011), we calculate spatial distribution atoms excited a dense and cold atomic cloud by weak monochromatic light. We also study over different Zeeman sublevels state parts cloud. The dependence this excitation on density ensemble frequency external emission is investigated. show that boundary regions orientation alignment angular momentum takes place. Analysis shows no noticeable signs light localization...

We report the development of quantum microscopic theory quasiresonant dipole-dipole interaction in ensembles impurity atoms imbedded into transparent dielectric and located a Fabry-Perot cavity. On basis general approach we study simultaneous influence cavity resonant on shape line atomic transition as well light trapping dense ensembles. analyze this depending size ensemble, its density, rms deviation frequency shifts caused by symmetry disturbance internal fields medium. Obtained results...

We calculate the differential cross section of polarized light scattering from a cold and dense atomic ensemble. The regularities in transformation when increasing size ensemble are analyzed numerically. show that for typical experimental conditions, an approximate scaling law can be obtained. Very good agreement is found comparison with data on dependence cloud 87$Rb atoms.

On the basis of a quantum microscopic approach, we study excitation dynamics two motionless point atoms located in fixed positions near perfectly conductive charged surface. We analyze spontaneous decay rate individual plate, as well strength dipole–dipole interaction between different atoms. It is shown that an excited atom depends to significant extent on its distance from mirror. In case where interatomic separation smaller than or comparable wavelength resonant radiation, cooperative, so...

We study the peculiarities of coherent population trapping (CPT) dark resonance in atomic vapor confined a finite-size cell. Taking into account scattering atoms on anti-relaxation coating walls, we analyze line shape CPT <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msup> <mml:mi/> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mn>133</mml:mn> </mml:mrow> </mml:msup> <mml:mi mathvariant="normal">C</mml:mi> mathvariant="normal">s</mml:mi> </mml:math> depending...

We analyze resonant light scattering from a dense and disordered ensemble of motionless point-like scatters with uniform (on average) spatial distribution the density. The average interatomic distance is considered comparable wavelength mean free path photon. inhomogeneity dipole-dipole interaction near surface discussed. Angular scattered medium in slab geometry calculated. total reflected power [Formula: see text] reflectivity depending on optical thickness are analyzed. It shown that case...

Spontaneous decay of an excited atom in a waveguide is essentially modified by the spatial structure vacuum reservoir. This particularly exciting view range applications for quantum information science. We found out that spontaneous can be incomplete, so time dependence state population asymptotically approaches to nonzero value, under conditions when atomic transition frequency larger than cutoff and far from vicinities cut-offs. Discovered effect explained emergence dark state, which...

Light transport in a disordered ensemble of resonant atoms placed waveguide is found to be very sensitive the sizes cross section waveguide. Based on self-consistent quantum microscopic model treating as coherent radiating dipoles, we have shown that nature radiation transfer changes from Anderson localization regime single-mode traditional diffuse multimode one. Moreover, transmittance magnitude undergoes complicated steplike nonmonotonic dependence transverse

On the basis of a quantum microscopic approach we study cooperative effects induced by dipole-dipole interaction in an ensemble point-like impurity centers located near charged perfectly conducting surface. We analyze simultaneous influence modified spatial structure field modes conductive surface and electric on transition spectrum excited atom inside radiation trapping. show that modifies Lamb shift, as well character sub- superradiant decay. also demonstrate these modifications differ...

We show that atomic motion leads not only to noticeable quantitative, but in some cases also qualitative modification of collective effects dense and cold ensembles even the case when characteristic Doppler shifts are tens times smaller than natural linewidth. The observed influence is explained as a result suppression impact sub-radiant states caused by displacement atoms.

We report a theoretical investigation of angular distribution single-photon superradiance from cold and dilute atomic clouds. In the present work we focus our attention on dependence size shape cloud. analyze dynamics afterglow ensemble excited by pulse radiation. Two approaches are used. The first is quantum microscopic approach based coupled-dipole model. second random walk approximation. show that results obtained in both coincide with good accuracy for incoherent fluorescence short...