caa a22 4500 445867299 CHVBK 20180317145501.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1140/epjd/e2011-20027-2 doi (NATIONALLICENCE)springer-10.1140/epjd/e2011-20027-2 Interaction-enhanced double resonance in cold gases [Elektronische Daten] [A. Safonov, I. Safonova, I. Yasnikov] A new type of double-resonance spectroscopy of a quantum gas based on interaction-induced frequency modulation of a probe transition has been considered. Interstate interaction of multilevel atoms causes a coherence-dependent collisional shift of the transition between the atomic states |1〉 and |2〉 due to a nonzero population of the state |3〉. Thus, the frequency of the probe transition |1〉−|2〉 experiences oscillations associated with the Rabi oscillations between the states |1〉 and |3〉 under continuous excitation of the drive resonance |1〉−|3〉. Such a dynamic frequency shift leads to a change in the electromagnetic absorption at the probe frequency and, consequently, greatly enhances the sensitivity of double-resonance spectroscopy as compared to traditional "hole burning”, which is solely due to a decrease in the population of the initial state |1〉. In particular, it has been shown that the resonance linewidth is determined by the magnitude of the contact shift and the amplitude of the drive field and does not depend on the static field gradient. The calculated line shape and width agree with the low-temperature electron-nuclear double-resonance spectra of two-dimensional atomic hydrogen. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Safonov A. National Research Centre Kurchatov Institute, 123182, Moscow, Russia aut Safonova I. National Research Centre Kurchatov Institute, 123182, Moscow, Russia aut Yasnikov I. Togliatti State University, 445667, Togliatti, Russia aut The European Physical Journal D Springer-Verlag 65/1-2(2011-11-01), 279-284 1434-6060 65:1-2<279 2011 65 10053 https://doi.org/10.1140/epjd/e2011-20027-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2011-20027-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Safonov A. National Research Centre Kurchatov Institute, 123182, Moscow, Russia aut NATIONALLICENCE 700 1- Safonova I. National Research Centre Kurchatov Institute, 123182, Moscow, Russia aut NATIONALLICENCE 700 1- Yasnikov I. Togliatti State University, 445667, Togliatti, Russia aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 65/1-2(2011-11-01), 279-284 1434-6060 65:1-2<279 2011 65 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer