Former projects

Observation of dipolar supersolids
(University of Stuttgart, Pfau Lab, 2016-2023)

First observation of a supersolid state of matter and its elementary excitations, coherence and superfluidity using dysprosium atoms. Observation of anisotropic superfluidity and imaging of dipolar rotons.




Direct cooling of OH molecules

(JILA, Ye Lab, 2014-2016)

Direct cooling and trapping of hydroxyl radicals, Stark deceleration.


Non-equilibrium dynamics of one-dimensional Bose gases

(TU Wien, Schmiedmayer Lab, 2009-2014)

Matterwave interferometry using atomchips: First observation of prethermalization, of a generalized Gibbs ensemble (GGE), of light-cone-like emergence of a thermal state, as well as pioneering analysis methods for field theories based on higher-order correlations.


  • Experimental characterization of a quantum many-body system via higher-order correlations
    T. Schweigler, V. Kasper, S. Erne, I. Mazets, B. Rauer, F. Cataldini, T. Langen,
    T. Gasenzer, J. Berges, and J. Schmiedmayer
    Nature 545, 323–326 (2017)
  • Experimental observation of a generalized Gibbs ensemble
    T. Langen, S. Erne, R. Geiger, B. Rauer, T. Schweigler, M. Kuhnert, W. Rohringer, I. E. Mazets, T. Gasenzer, and J. Schmiedmayer
    Science 348, 207 (2015), arXiv:1411.7185
  • Local emergence of thermal correlations in an isolated quantum many-body system
    T. Langen, R. Geiger, M. Kuhnert, B. Rauer, and J. Schmiedmayer
    Nature Physics 9, 640–643 (2013), arxiv:1305.3708
  • Relaxation and prethermalization in an isolated quantum system
    M. Gring, M. Kuhnert, T. Langen, T. Kitagawa, B. Rauer, M. Schreitl, I. Mazets, D. Adu Smith, E. Demler, and J. Schmiedmayer
    Science 337, 1318 (2012), arXiv:1112.0013
  • Non-equilibrium dynamics of one-dimensional Bose gases
    T. Langen
    PhD Thesis, Technical University of Vienna, Austria (2013)

Strongly interacting Bose gases
(ENS Paris, Salomon Lab, 2012)

Ultracold bosonic gases of Lithium 6 in the unitary limit


Electron microscopy of ultracold quantum gases 

(University of Mainz, Ott Lab)

First imaging and addressing of single sites in an optical lattice.


  • High resolution scanning electron microscopy of an ultracold quantum gas
    T. Gericke, P. Würtz, D. Reitz, T. Langen, and H. Ott
    Nature Physics 4, 949 – 953 (2008)
  • Experimental demonstration of single-site addressability in a two-dimensional optical lattice
    P. Würtz, T. Langen, T. Gericke, A. Koglbauer, and H. Ott
    Phys. Rev. Lett. 103, 080404 (2009)
  • Addressing of ultracold atoms in optical lattices
    T. Langen
    Diplomarbeit, Johannes Gutenberg-Universität Mainz, Germany (2008)