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APS » Journals » Phys. Rev. Lett. » Volume 83 » Issue 13
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Phys. Rev. Lett. 83, 2502–2505 (1999)

Evidence for a Critical Velocity in a Bose-Einstein Condensed Gas

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C. Raman, M. Köhl, R. Onofrio, D. S. Durfee, C. E. Kuklewicz, Z. Hadzibabic, and W. Ketterle
Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Received 20 August 1999; published in the issue dated 27 September 1999

We have studied dissipation in a Bose-Einstein condensed gas by moving a blue detuned laser beam through the condensate at different velocities. Strong heating was observed only above a critical velocity.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.2502
DOI:
10.1103/PhysRevLett.83.2502
PACS:
03.75.Fi, 67.40.Vs, 67.57.De
 
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