Quantum Optics Laboratory

Ten years ago the first dipolar effects in a quantum gas were observed in a Chromium gas. By the use of a Feshbach resonance a purely dipolar quantum gas was observed three years after [1]. Among others dipolar interaction effects have been observed in lattices and with alkalis and fermionic species. Recently it became possible to study degenerate gases of lanthanide atoms. The recent observation of their collisional properties includes the emergence of quantum chaos and very broad resonances [2, 3]. We discuss the recent status of our experiments with quantum gases of Dysprosium atoms which includes the observation of the Rosensweig instability for a magnetic quantum gas [4]. 

[1] T. Lahaye, C. Menotti, L. Santos, M. Lewenstein, and T. Pfau, "The physics of dipolar bosonic quantum gases", Rep. Prog. Phys. 72, 126401 (2009)

[2] T. Maier, I. Ferrier-Barbut, H. Kadau, M. Schmitt, M. Wenzel, C. Wink, T. Pfau, K. Jachymski, P. S. Julienne, "Broad Feshbach resonances in collisions of ultracold Dysprosium atoms", arXiv:1506.01875

[3] T. Maier, H. Kadau, M. Schmitt, M. Wenzel, I. Ferrier-Barbut, T. Pfau, A. Frisch, S. Baier, K. Aikawa, L. Chomaz, M. J. Mark, F. Ferlaino, C. Makrides, E. Tiesinga, A. Petrov, S. Kotochigova, "Emergence of chaotic scattering in ultracold Er and Dy", arXiv:1506.05221

[4] H. Kadau, M. Schmitt, M. Wenzel, C. Wink, T. Maier, I. Ferrier-Barbut, T. Pfau
"Observing the Rosensweig instability of a quantum ferrofluid"
arXiv:1508.05007