Experimental Observation of the Bogoliubov Transformation for a Bose-Einstein Condensed Gas
- 28 January 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 88 (6), 060402
- https://doi.org/10.1103/physrevlett.88.060402
Abstract
Phonons with wave vector were optically imprinted into a Bose-Einstein condensate. Their momentum distribution was analyzed using Bragg spectroscopy with a high momentum transfer. The wave function of the phonons was shown to be a superposition of and free particle momentum states, in agreement with the Bogoliubov quasiparticle picture.
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