Efficient loading of a BEC into a matter wave resonator*

Matter wave resonators have long attracted attention [1]. Their applications include velocity filtering, storage of BECs, and sensing. Resonant transmission of polaritons through a double barrier was recently observed [2], but cavities for cold atoms have not yet been created. The challenges here include creating suitable potentials and nonlinearity due to inter-atomic interactions. We present GPE simulation results which demonstrate that it is possible to realize a matter wave cavity resonator with the incident BEC propagating in an optical waveguide generated by the painted potential technique [3]. We will discuss the coupling of both interacting and non-interacting BECs into such resonators and the methods required to make the coupling efficient, along with experimental progress.\\[4pt] [1] V. I. Balykin and V. S. Letokhov, Appl. Phys. B 48, 517 (1989); M. Wilkens et al., Phys. Rev. A 47, 2366 (1993); I. Carusotto, Phys. Rev. A 63, 023610 (2001); T. Paul et al., Phys. Rev. Lett. 94, 020404 (2005); F. Damon et al., Phys. Rev. A 89, 053626 (2014).\\[0pt] [2] H. S. Nguyen et al., Phys. Rev. Lett. 110, 236601 (2013)\\[0pt] [3] K. Henderson et al., New J. Phys. 11, 043030 (2009); C. Ryu et al., Phys. Rev. Lett. 111, 205301 (2013); C. Ryu and M. G. Boshier, arXiv:1410.8814 (2014);