Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 53: Cold Molecules II

Q 53.2: Vortrag

Donnerstag, 15. März 2012, 14:30–14:45, V38.03

A Centrifuge Molecular Decelerator for Polar Molecules — •Sotir Chervenkov, Xing Wu, Andreas Rohlfes, Joseph Bayerl, Laurens D. van Buuren, Christian Sommer, Martin Zeppenfeld, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching bei München

We present a novel technique for deceleration of neutral polar molecules, which employs the centrifugal potential in a rotating frame. The idea is to inject and electrically guide [1] a dense continuous beam of polar molecules from the periphery to the center of the rotating frame along a spiral trajectory. Thus the molecules climb up a centrifugal potential hill and get decelerated as they propagate. Since the rotational speed is tunable, the centrifuge decelerator is well-suited for a large range of input velocities. Moreover, in combination with our cryogenic source [2], internally cold molecules will be decelerated. For this setup, simulations show that ammonia beams with velocities below 20 m/s and with fluxes of 109 molecules/s are feasible. The outcoming quasi-continuous, slow, and dense molecular beams are ideal for various applications requiring cold molecules, in particular, for trapping and subsequent opto-electrical cooling [3].

[1] S.A. Rangwala et al., Phys. Rev. A 67, 043406 (2003)

[2] L.D. van Buuren et al., Phys. Rev. Lett. 102, 033001 (2009)

C. Sommer et al., Faraday Discuss. 142, 203 (2009)

[3] M. Zeppenfeld et al., Phys. Rev. A 80, 041401 (2009),

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