Van der Waals-Zeeman Colloquium
Tuesday, 23 June 2009, 16:00
Correlations and transport in Bose gases
Dr. Michael Köhl
University of Cambridge
Cold atomic gases are systems of unrivalled purity. Many of their extraordinary features have been studied in the past years and exceptional experimental control of quantum many-body states has been achieved. Many concepts from traditional condensed matter physics can be studied under a much cleaner and better controlled conditions. We will discuss two of our recent experiments highlighting the fascinating many-body physics in cold Bose gases. The measurement of the first order correlation function at the Bose-Einstein phase transition (and the corresponding critical exponent) reveals the intimate relation between cold atomic gases and superfluid Helium. Additionally, we will discuss spin impurity transport in atomic Bose gases with a special emphasis on one-dimensional Bose gases in the strongly interacting regime (the Tonks-Girardeau gas).