Title:	Cooling of trapped ions by resonant charge exchange
Authors:	Dutta, Sourav Rangwala, S.A.
Issue Date:	Apr-2018
Publisher:	American Physical Society
Citation:	Physical Review A, 2018 ,Vol.97, p041401
Abstract:	The two most widely used ion cooling methods are laser cooling and sympathetic cooling by elastic collisions (ECs). Here, we demonstrate another method of cooling ions that is based on resonant charge exchange (RCE) between the trapped ion and the ultracold parent atom. Specifically, trapped Cs+ ions are cooled by collisions with cotrapped, ultracold Cs atoms and, separately, by collisions with cotrapped, ultracold Rb atoms. We observe that the cooling of Cs+ ions by Cs atoms is more efficient than the cooling of Cs+ ions by Rb atoms. This signals the presence of a cooling mechanism apart from the elastic ion-atom collision channel for the Cs-Cs+ case, which is cooling by RCE. The efficiency of cooling by RCE is experimentally determined and the per-collision cooling is found to be two orders of magnitude higher than cooling by EC. The result provides the experimental basis for future studies on charge transport by electron hopping in atom-ion hybrid systems.
Description:	Open Access
URI:	http://hdl.handle.net/2289/6937
ISSN:	2469-9926 2469-9934 (online)
Alternative Location:	https://arxiv.org/abs/1705.07572 http://dx.doi.org/10.1103/PhysRevA.97.041401 https://doi.org/10.1103/PhysRevA.97.041401
Copyright:	2018 American Physical Society
Appears in Collections:	Research Papers (LAMP)

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.