Phys. Rev. A 73, 020702(R) (2006) [4 pages]

Collisional deexcitation in a quasi-two-dimensional degenerate bosonic gas

Abstract

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I. B. Spielman^1,*, P. R. Johnson¹, J. H. Huckans^1,2, C. D. Fertig^1,2,†, S. L. Rolston^1,2, W. D. Phillips^1,2, and J. V. Porto¹
¹National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
²University of Maryland, College Park, Maryland 20742, USA

Received 3 September 2005; published 15 February 2006

We separate a Bose-Einstein condensate into an array of two-dimensional (2D) sheets and excite quantized vibrational motion in the direction normal to the sheets. The measured collisional decay rates are suppressed due to the reduced dimensionality, a matter wave analog to inhibited spontaneous emission. After decay, the large excitation energy is transferred to back-to-back outgoing atoms, imaged as rings in the 2D plane. The ring diameters correspond to vibrational energy level differences, and edge-on imaging allows identification of the final vibrational states.

URL:

http://link.aps.org/doi/10.1103/PhysRevA.73.020702

DOI:

10.1103/PhysRevA.73.020702

PACS:

34.30.+h, 03.75.Kk, 05.30.Jp

^*Electronic address: ian.spielman@nist.gov

^†Present address: University of Georgia, Athens, GA 30602.

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Phys. Rev. A 73, 020702(R) (2006) [4 pages]

Collisional deexcitation in a quasi-two-dimensional degenerate bosonic gas