Dynamic of cold-atom tips in anharmonic potentials

Beilstein Journal of Nanotechnology

Hendrik Hölscher¹  Carola Rogulj²  Peter Federsel²  Andreas Günther²  Tobias Menold²  József Fortágh² 

[1] Institut für Mikrostrukturtechnik, Karlsruher Institut für Technologie, 76344 Eggenstein-Leopoldshafen, Germany;Physikalisches Institut, Eberhardt-Karls-Universität Tübingen, D-72076 Tübingen, Germany;

关键词: anharmonic motion;    cold-atom scanning probe microscopy;    dephasing;    dynamic mode;    tip oscillation;   

DOI  :  10.3762/bjnano.7.148

来源: DOAJ

【 摘 要 】

Background: Understanding the dynamics of ultracold quantum gases in an anharmonic potential is essential for applications in the new field of cold-atom scanning probe microscopy. Therein, cold atomic ensembles are used as sensitive probe tips to investigate nanostructured surfaces and surface-near potentials, which typically cause anharmonic tip motion.Results: Besides a theoretical description of this anharmonic tip motion, we introduce a novel method for detecting the cold-atom tip dynamics in situ and real time. In agreement with theory, the first measurements show that particle interactions and anharmonic motion have a significant impact on the tip dynamics.Conclusion: Our findings will be crucial for the realization of high-sensitivity force spectroscopy with cold-atom tips and could possibly allow for the development of advanced spectroscopic techniques such as Q-control.

【 授权许可】

Unknown