St. Petersburg Polytechnic University Journal: Physics and Mathematics Научно-технические ведомости СПбГПУ. Физико-математические науки 2304-9782, 2618-8686, 2405-7223 12 A comparison of macroscopic and microscopic methods of calculation of dielectric permittivity of dense ultracold atomic clouds Сравнение макро- и микроскопического методов расчета диэлектрической проницаемости плотных ультрахолодных атомных облаков Kuraptsev Alexey aleksej-kurapcev@yandex.ru Sokolov I.M. IMS@IS12093.spb.edu 10 06 2012 2 146 73 79

In this article we discuss the problems of theoretical description of light interaction with complex atomic systems, chilled down to very low temperatures. Basic actual approaches are outlined and the results are compared.

 cold atoms dense ultracold atomic clouds strong localization quantum optics resonance dipole-dipole interaction