Superfluid and dissipative dynamics of a Bose-Einstein condensate in a periodic optical potential

Anno: 2001

Autori: Burger S., Cataliotti F. S., Fort C., Minardi F., Inguscio M., Chiofalo M., Tosi M. P.

Affiliazione autori: INFM-LENS, Dipartimento di Fisica, Università di Firenze, Largo Enrico Fermi 2, I-50125 Firenze, Italia;
INFM-Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italia

Abstract: We create Bose-Einstein condensates of Rb-87 in a static magnetic trap with a superimposed blue-detuned 1D optical lattice. By displacing the magnetic trap center we are able to control the condensate evolution. We observe a change in the frequency of the center-of-mass oscillation in the harmonic trapping potential, in analogy with an increase in effective mass. For fluid velocities greater than a local speed of sound, we observe the onset of dissipative processes up to full removal of the superfluid component. A parallel simulation study visualizes the dynamics of the Bose-Einstein condensate and accounts for the main features of the observed behavior.

Giornale/Rivista: PHYSICAL REVIEW LETTERS

Volume: 86 (20)      Da Pagina: 4447  A: 4450

Parole chiavi: Computer simulation; Crystal lattices; Electron traps; Electronic density of states; Flow of fluids; Magnetic field effects; Oscillations; Phonons, Magnetic trap; Optical lattices; Periodic optical potential, Condensation
DOI: 10.1103/PhysRevLett.86.4447

Citazioni: 302
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-09-08
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