Dipolar gases – from magnetic atoms to molecules 14. January 2020 | 14:15 h - 15:45 h
Over the last two decades ultracold quantum gases have become a versatile tool in many fields of physics ranging from quantum simulation to non-linear optics and precision measurements. Their particular appeal stems from the precise tunability of nearly all relevant parameters, including the strength of interactions between the particles in the gas. However, the character of these interactions is typically limited to be isotropic and shortranged. If the particles, on the other hand, feature magnetic or electric dipole moments, interactions can become anisotropic and long-ranged.
In this talk I will highlight how this subtle change has recently lead to the discovery of a wealth of new phenomena in experiments with magnetically dipolar atomic gases. These phenomena include novel supersolid states of matter [1,2], self-bound quantum liquids [3], or the emergence of quantum chaos [4].
Moreover, I will also present an ongoing effort to directly laser cool electrically dipolar molecules into the quantum regime [5], which, for the future, promises even richer dipolar physics and many further applications.
[1] F. Boettcher et al.: Transient supersolid properties in an array of dipolar quantum droplets, Phys. Rev. X 9, 011051 (2019).[2] M. Guo et al.: The low-energy Goldstone mode in a trapped dipolar supersolid, Nature, in print (2019).
[3] M. Schmitt et al.: Self-bound droplets of a dilute magnetic quantum liquid, Nature 539, 259 (2016).
[4] T. Langen and M.J. Mark: Ultrakalt magnetisiert, Physik Journal 17, 35 (2018).
[5] M. Tarbutt: Laser cooling of molecules, Contemp. Phys. (2019).
Lecturer
Dr. Tim Langen, 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart