Details
| Original language | English |
|---|---|
| Article number | 015604 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 75 |
| Issue number | 1 |
| Publication status | Published - 22 Jan 2007 |
Abstract
We propose a scheme for the measurement of the s -wave scattering length a of an atom or molecule with significant dipole-dipole interaction with an accuracy at the percent level. The frequencies of the collective oscillations of a Bose-Einstein condensate are shifted by the magnetic dipole interaction. The shift is polarization dependent and proportional to the ratio εdd of dipolar and s -wave coupling constants. Measuring the differences in the frequencies for different polarization we can extract the value of εdd and thus measure a. We calculate the frequency shifts for a large variety of nonaxisymmetric harmonic traps in the Thomas-Fermi limit and find optimal trapping geometries to maximize the shifts.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 75, No. 1, 015604, 22.01.2007.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Collective oscillations of dipolar Bose-Einstein condensates and accurate comparison between contact and dipolar interactions
AU - Giovanazzi, S.
AU - Santos, Luis
AU - Pfau, T.
PY - 2007/1/22
Y1 - 2007/1/22
N2 - We propose a scheme for the measurement of the s -wave scattering length a of an atom or molecule with significant dipole-dipole interaction with an accuracy at the percent level. The frequencies of the collective oscillations of a Bose-Einstein condensate are shifted by the magnetic dipole interaction. The shift is polarization dependent and proportional to the ratio εdd of dipolar and s -wave coupling constants. Measuring the differences in the frequencies for different polarization we can extract the value of εdd and thus measure a. We calculate the frequency shifts for a large variety of nonaxisymmetric harmonic traps in the Thomas-Fermi limit and find optimal trapping geometries to maximize the shifts.
AB - We propose a scheme for the measurement of the s -wave scattering length a of an atom or molecule with significant dipole-dipole interaction with an accuracy at the percent level. The frequencies of the collective oscillations of a Bose-Einstein condensate are shifted by the magnetic dipole interaction. The shift is polarization dependent and proportional to the ratio εdd of dipolar and s -wave coupling constants. Measuring the differences in the frequencies for different polarization we can extract the value of εdd and thus measure a. We calculate the frequency shifts for a large variety of nonaxisymmetric harmonic traps in the Thomas-Fermi limit and find optimal trapping geometries to maximize the shifts.
UR - http://www.scopus.com/inward/record.url?scp=33846491862&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.75.015604
DO - 10.1103/PhysRevA.75.015604
M3 - Article
AN - SCOPUS:33846491862
VL - 75
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 1
M1 - 015604
ER -