Translational cooling of doped nanocrystals by Raman pulses: Towards macroscopic quantum state |
| |
Authors: | Tatiana A Vovk Semyon S Rudyi Andrei V Ivanov Evgeniy Y Perlin Yuri V Rozhdestvensky |
| |
Institution: | Information Optical Technologies Center, ITMO University, Saint Petersburg 197101, Russia |
| |
Abstract: | One of the most interesting problems of modern physics is the realization of nanoparticles in macroscopic quantum states, in which they behave as a quantum objects. These states can only be implemented at ultra-low translational temperatures that have not been achieved so far. Here we develop a novel method for optical cooling of CaF2:Yb3+ nanocrystals, which is based on the coherent population transfer induced in the impurity ions by ultraviolet Raman pulses. A doped nanocrystal localized in a radio-frequency trap is cooled due to the photon recoil from the pulses of varied intensity. The proposed method allows to obtain nanocrystals with translational temperatures of the order of 10?9 K, which indicates that the nanocrystal approaches a macroscopic quantum state. |
| |
Keywords: | Macroscopic quantum states Laser cooling Nanocrystals Rare-earth-doped materials Raman pulses Radio-frequency traps |
本文献已被 ScienceDirect 等数据库收录! |