У оквиру семинара Центра за изучавање комплексних система Института за физику у Београду, у понедељак, 13. маја 2024. године у 14 часова у читаоници библиотеке „др Драган Поповић“, др Максим Ефремов (Немачки центар за ваздухопловство и свемир (DLR), Институт за квантне технологије, Улм, Немачка ) одржаће предавање:
Angular Bloch oscillations and their applications
САЖЕТАК:
To advance precise inertial navigation, in this talk we will introduce a compact quantum sensor which is based on novel quantum phenomenon of the angular Bloch oscillations [1] and measures solely the angular acceleration of slow external rotation. We will present a study of the dynamics of ultracold atoms confined in a toroidal trap with a ring-lattice along the azimuth angle, realized with the superposition of two co-propagating Laguerre-Gaussian beams. In the presence of external rotation of small angular acceleration, or prescribed linear chirp between the two beams, the measured angular momentum of trapped atoms displays a specific periodic behavior in time, which we name as the angular Bloch oscillations. This discovered quantum phenomenon is shown to be a key element of fruitful applications for an efficient transfer of quantized angular momentum from light field to atoms, and realization of compact quantum sensor to measure exclusively the angular acceleration of external rotation.
[1] B. Konrad and M. Efremov, arXiv:2402.12826 (2024).