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Motional and spin dynamics of individual impurities coupled to an ultracold bath

date
19.10.2018 
time
03:00 PM - 04:00 PM 
speaker
Artur Widera 
affiliation
University of Kaiserslautern 
language
en 
main topic
Physics: Theoretical Physics
abstract

Impurities can significantly modify the properties of materials; prominent examples are colors of gemstones or the conductance of a semiconductor. In the quantum realm, the coupling of individual atomic impurities to a many-body system is a paradigm forming the foundation of many highly-successful models, such as the spin-boson or the central-spin model, revealing detailed, local information about the environment.
I will present our experimental approach to immerse individual Cesium atoms as tightly-controlled atomic impurities into an ultracold Rubidium cloud, being either a thermal gas or a Bose-Einstein condensate. We study the interaction between impurity and gas, where all relevant parameters, including inter-species interaction strength, can be experimentally controlled. We have implemented a range of methods to retrieve precise information about motional/thermal as well as internal (spin) states of the impurity, reflecting a snapshot of the local state of the many-body system. I will present the current state of the project, aiming on local, non-destructive probing of the relaxation dynamics of a quantum gas out of equilibrium.

 

Last update: 19.10.2018 00:05.

venue 

Max-Planck-Institut für Physik komplexer Systeme (Room 1D1) 
Nöthnitzer Straße 38
01187 Dresden
telefon
+ 49 (0)351 871 0 
e-mail
Max-Planck-Institut für Physik komplexer Systeme 
homepage
http://www.mpipks-dresden.mpg.de 

organizer 

Max-Planck-Institut für Physik komplexer Systeme (MPI-PKS)
Nöthnitzer Straße 38
01187 Dresden
telefon
+ 49 (0)351 871 0 
e-mail
Max-Planck-Institut für Physik komplexer Systeme (MPI-PKS) 
homepage
http://www.mpipks-dresden.mpg.de 
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