ИСТИНА

RESONANT FLUORESCENCE IN A MONOCHROMATICALLY DRIVEN TWO-LEVEL QUANTUM SYSTEM WITH BROKEN INVERSION SYMMETRY Nikolai N. Bogolubov, Jr. 1*, Andrey V. Soldatov 2** 1,2 V.A.Steklov Mathematical Institute of the Russian Academy of Sciences, Gubkina str. 8, 119991, Moscow, Russia * nikolai_bogolubov@hotmail.com, **soldatov@mi.ras.ru Resonant fluorescence phenomenon in a two-level quantum system possessing dipole moment operator with permanent non-equal diagonal matrix elements and driven by an external monochromatic EM (laser) field was studied. An expression for the fluorescent radiation spectrum in a far-distant zone was derived. It was shown that such two-level system can radiate continuously at much lower frequency when driven by high-frequency laser field. It was also found that the same driven two-level quantum system is able to amplify weak probe EM radiation waves belonging to the low frequency range. Possible ways to observe the predicted effects experimentally and employ them for a wide range of practical applications are discussed.