Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 17: Bose-Einstein Condensation (joint session A/Q)
Q 17.7: Talk
Monday, March 5, 2018, 15:30–15:45, K 2.016
Approaching Steady-State Quantum Degeneracy — •Shayne Bennetts, Chun-Chia Chen, Rodrigo Gonzalez Escudero, Benjamin Pasquiou, and Florian Schreck — Institute of Physics, University of Amsterdam
So far BECs and atom lasers have only been demonstrated as the product of a time sequential, pulsed cooling scheme. Here we will describe a steady-state system demonstrating phase-space densities (PSD) approaching degeneracy. By flowing atoms through a series of spatially separated cooling stages and employing a range of novel tricks we recently demonstrated a steady-state strontium MOT with a PSD above 10−3 [1], 100 times higher than previous experiments. Now we demonstrate a set of tools, compatible with steady-state operation, to continuously cool and transfer microkelvin-cold atoms from a MOT into a dipole trap reservoir. Furthermore, by combining our novel machine architecture with a lighshift engineering technique we previously demonstrated [2], we protect a BEC from the strong fluorescence of a nearby MOT. Using all these tools on our high PSD MOT, quantum degeneracy in a steady-state system seems at reach. A steady-state source of degenerate atoms offers great advantages for applications such as next generation degenerate atomic clocks, super-radiant lasers or atom-interferometers for gravitational wave detection.
[1] S. Bennetts et al., Phys. Rev. Lett. 119, 223202 (2017).
[2] S. Stellmer et al., Phys. Rev. Lett. 110, 263003 (2013).