Bragg spectroscopy of the multibranch Bogoliubov spectrum of elongated Bose-Einstein condensates

Physical Review Letters

Volumn 90, Issue 6, 2003, Pages

  Steinhauer, J ^a   Katz, N ^a   Ozeri, R ^a   Davidson, N ^a   Tozzo, C ^b   Dalfovo, F ^b,c  

^a WEIZMANN INSTITUTE OF SCIENCE   (Israel)

^b UNIVERSITÀ CATTOLICA DEL SACRO CUORE   (Italy)

^c INFM Unita di Brescia and BEC INFM   (Italy)

Author keywords

[No Author keywords available]

Indexed keywords

APPROXIMATION THEORY; COMPUTER SIMULATION; DAMPING; DEGREES OF FREEDOM (MECHANICS); DIFFRACTION GRATINGS; ELECTROMAGNETIC DISPERSION; ENERGY DISSIPATION; FREQUENCIES; LASER PULSES; LIGHT ABSORPTION; PROBABILITY DENSITY FUNCTION; SPECTROSCOPIC ANALYSIS;

BELIAEV AND LANDAU DAMPING; BOSE-EINSTEIN CONDENSATES; BRAGG SPECTROSCOPY; GROSS-PITAEVSKII EQUATION; LOCAL DENSITY APPROXIMATION; MULTIBRANCH BOGOLIUBOV SPECTRUM; TRAPPING FREQUENCIES;

PHOTONS;

EID: 0037435867     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (18)

1. N. N. Bogoliubov, J. Phys. (Moscow) 11, 23 (1947).
2. D. M. Stamper-Kurn et al., Phys. Rev. Lett. 83, 2876 (1999).
3. J. M. Vogels et al., Phys. Rev. Lett. 88, 060402 (2002).
4. J. Steinhauer et al., Phys. Rev. Lett. 88, 120407 (2002).
5. R. Ozeri et al., Phys. Rev. Lett. 88, 220401 (2002).
6. A. Brunello et al., Phys. Rev. Lett. 85, 4422 (2000).
7. F. Zambelli et al., Phys. Rev. A 61, 063608 (2000).
8. A. Brunello et al., Phys. Rev. A 64, 063614 (2001).
9. A. A. Penckwitt and R. J. Ballagh, J. Phys. B 34, 1523 (2001).
10. P. O. Fedichev and G. V. Shlyapnikov, Phys. Rev. A 63, 045601 (2001).
11. E. Zaremba, Phys. Rev. A 57, 518 (1998).
12. F. Dalfovo et al., Rev. Mod. Phys. 71, 463 (1999).
13. P. B. Blakie and R. J. Ballagh, J. Phys. B 33, 3961 (2000).
14. F. Dalfovo and M. Modugno, Phys. Rev. A 61, 023605 (2000).
15. A longer time scale is fixed by the axial trapping period (40 ms). For such durations other processes become important (reflection of axial modes at the boundary, center-of-mass motion, nonlinear effects, etc.). This regime is considered in [13].
16. Y. B. Band and M. Sokuler, cond-mat/0207749.
17. The calculated frequencies have an uncertainty of the order of 0.05 kHz, due to the finite time interval used for the Fourier analysis.
18. In this range of k only three branches are visible in the Fourier spectrum. The efficiency of the Bragg perturbation (2) in exciting higher branches increases with k.