25. April 2017 09:30
Konferenzraum 2-3, Physikalisches Institut, Im Neuenheimer Feld 226
Dr. Olivier Dulieu
Laboratoire Aimé Cotton, CNRS, Université Paris-Sud XI, 91405 Orsay Cedex, France
Dilute gases of ultracold atoms and molecules are at the heart of amazing progress over the past thirty years in atomic, molecular and optical physics from both experimental and theoretical points of view. The ultralow velocity of the particules allows for long observation times and induces an extreme sensitivity to weak interactions, thus unveiling properties usually hidden at room temperatures, and opening unique opportunities for controlling matter at the single quantum level.
In our group we are focusing our theoretical studies on two kinds of molecular systems: cold neutral dipolar molecules composed of two alkali-metal atoms [1,2] and one alkali atom and one alkaline-earth atom .Such systems exhibit a rich dynamics often assisted or controlled by light. They are suitable for studying anisotropic interactions between particles, with exciting prospects toward ultracold chemistry and quantum simulation.
I shall present an overview of our recent theoretical achievements in this domain, based on new accurate quantum chemistry computations of potential energy surfaces of ground and excited molecular states and of relevant transition dipole moments. In particular, formation processes and optical shielding of collisions will be discussed.
 M. Guo, B. Zhu, B. Lu, X. He, F. Wang, R. Vexiau, N. Bouloufa-Maafa, G. Quéméner, O. Dulieu, D. Wang, Phys. Rev. Lett., 116, 205303 (2016)
 D. Borsalino, R. Vexiau, M. Aymar, E. Luc-Koenig, O. Dulieu, N. Bouloufa-Maafa, J. Phys. B, 49, 055301 (2016)
 P. Zuchowski, R. Guérout and O. Dulieu, Phys. Rev. A 90, 012507 (2010).