Title :
Experimental observation of the Bogoliubov transformation for a Bose-Einstein condensed gas
Author :
Vogels, J.M. ; Xu, K. ; Raman, C. ; Abo-Shaeer, J.R. ; Ketterle, W.
Author_Institution :
Dept. of Phys., MIT, Cambridge, MA, USA
Abstract :
Summary form only given. Phonons with wavevector q//spl planck/-were optically imprinted into a Bose-Einstein condensate. Their momentum distribution was analyze using Bragg spectroscopy with a high momentum transfer. The wavefunction of these elementary excitations was shown to be a superposition of +q and -q free particle momentum states, in agreement with the Bogoliubov quasiparticle picture.
Keywords :
Bose-Einstein condensation; angular momentum; phonons; quasiparticles; Bogoliubov quasiparticle; Bogoliubov transformation; Bose-Einstein condensate; Bragg spectroscopy; condensate with phonons; elementary excitations; free particle momentum states; high momentum transfer; momentum distribution; two photon recoil; Phonons;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2002. QELS '02. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Long Beach, CA, USA
Print_ISBN :
1-55752-708-3
DOI :
10.1109/QELS.2002.1031245
