ИСТИНА

It is known from [1, 2] that the influence of high intensity laser fields causes the significant reconstruction of atomic system resulting in stabilization phenomenon, i.e. population trapping in high-lying Rydberg states. One of the possible ways to study the structure of such reconstructed (dressed) by the laser field quantum systems is to analyze their spontaneous emission. We have developed the new approach how to introduce spontaneous emission into the Schrödinger equation [3]. The proposed approach is applied to examine the dynamics of field-driven atomic system in the regime of interference stabilization (IS). Main predictions of IS theory are testified and confirmed. The effect of IS is also proposed to create the plasma channel with population inversion between set of Rydberg states and the ground state for the conversion of the input laser energy into the VUV and XUV frequency band [4]. Furthermore, there is a possibility to create a population inversion between high-lying Rydberg states which can be used for lasing and amplification in the IR, mid-IR and sub-terahertz frequency band. 1) M. V. Fedorov and A. M. Movsesian Field-induced effects of narrowing of photoelectron spectra and stabilisation of Rydberg atoms // J. Phys. B., 21, L155 (1988) 2) M. V. Fedorov, M.-M. Tehranchi, , and S. M. Fedorov Interference stabilization of Rydberg atoms: numerical calculations and physical models // J. Phys. B, 29, 2907 (1996) 3) A. V. Bogatskaya, E. A. Volkova, A. M. Popov Spontaneous transitions in atomic system in the presence of high intensity laser field // Europhysics Letters, 116, 14003 (2016). 4) A. V. Bogatskaya, E. A. Volkova, A. M. Popov Prospects of odd and even harmonics generation by an atom in high-intensity laser field // Las. Phys. Lett., 14, 055301 (2017).