Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster: Quantum Optics and Photonics I

Q 15.7: Poster

Monday, March 23, 2015, 17:00–19:00, C/Foyer

Collision studies in ultracold calcium atoms — •Hannes Winter, Purbasha Halder, and Andreas Hemmerich — Universität Hamburg

We present collision studies of metastable optically trapped calcium atoms and discuss the feasibility of achieving Bose-Einstein condensation in these states by evaporative cooling methods [1]. The metastable states of alkaline earth and rare earth elements have novel elastic and inelastic scattering prop-erties [2], with important implications for applications like time metrology and lattice-based quantum computing. The atoms are prepared by an alternative method analogous to the one used to create a ground state BEC [3]. We also discuss our new setup to realize a superradiant laser [4] similar to the proposal by [5].

References [1] P. Halder, H. Winter and A. Hemmerich, Phys. Rev. A 88, 063639 [2] V. Kokoouline et al., Phys. Rev. Lett. 90, 253201 (2003). [3] P. Halder, C.-Y. Yang and A. Hemmerich, Phys. Rev. A 85, 031603 (2012). [4] M. Holland and J. Thompson et al. Nature, 484(7392):78-81, (2012). [5] M. Holland et al., Phys. Rev. Lett. 102(16):163601, (2009).