Details
| Original language | English |
|---|---|
| Pages (from-to) | S190-S198 |
| Journal | Journal of Optics B: Quantum and Semiclassical Optics |
| Volume | 5 |
| Issue number | 2 |
| Publication status | Published - 2 Apr 2003 |
Abstract
The collective Raman cooling of trapped one- and two-component Fermi gases is considered. We obtain the quantum master equation that describes laser cooling in the festina lente regime, for which the heating due to photon reabsorption can be neglected. For the two-component case the collisional processes are described within the formalism of the quantum Boltzmann master equation. The inhibition of the spontaneous emission can be overcome by properly adjusting the spontaneous Raman rate during the cooling. Our numerical results, based on Monte Carlo simulations of the corresponding rate equations, show that three-dimensional temperatures of the order of 0.08TF (single component) and 0.03TF (two components) can be achieved. We investigate the statistical properties of the equilibrium distribution of the laser-cooled gas, showing that the number fluctuations are enhanced compared with the thermal distribution close to the Fermi surface. Finally, we analyse the heating related to the background losses, concluding that our laser-cooling scheme should maintain the temperature of the gas without significant additional losses.
Keywords
- Fermi gas, Laser cooling
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
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In: Journal of Optics B: Quantum and Semiclassical Optics, Vol. 5, No. 2, 02.04.2003, p. S190-S198.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Laser cooling of trapped Fermi gases
AU - Idziaszek, Z.
AU - Santos, Luis
AU - Baranov, M.
AU - Lewenstein, Maciej
PY - 2003/4/2
Y1 - 2003/4/2
N2 - The collective Raman cooling of trapped one- and two-component Fermi gases is considered. We obtain the quantum master equation that describes laser cooling in the festina lente regime, for which the heating due to photon reabsorption can be neglected. For the two-component case the collisional processes are described within the formalism of the quantum Boltzmann master equation. The inhibition of the spontaneous emission can be overcome by properly adjusting the spontaneous Raman rate during the cooling. Our numerical results, based on Monte Carlo simulations of the corresponding rate equations, show that three-dimensional temperatures of the order of 0.08TF (single component) and 0.03TF (two components) can be achieved. We investigate the statistical properties of the equilibrium distribution of the laser-cooled gas, showing that the number fluctuations are enhanced compared with the thermal distribution close to the Fermi surface. Finally, we analyse the heating related to the background losses, concluding that our laser-cooling scheme should maintain the temperature of the gas without significant additional losses.
AB - The collective Raman cooling of trapped one- and two-component Fermi gases is considered. We obtain the quantum master equation that describes laser cooling in the festina lente regime, for which the heating due to photon reabsorption can be neglected. For the two-component case the collisional processes are described within the formalism of the quantum Boltzmann master equation. The inhibition of the spontaneous emission can be overcome by properly adjusting the spontaneous Raman rate during the cooling. Our numerical results, based on Monte Carlo simulations of the corresponding rate equations, show that three-dimensional temperatures of the order of 0.08TF (single component) and 0.03TF (two components) can be achieved. We investigate the statistical properties of the equilibrium distribution of the laser-cooled gas, showing that the number fluctuations are enhanced compared with the thermal distribution close to the Fermi surface. Finally, we analyse the heating related to the background losses, concluding that our laser-cooling scheme should maintain the temperature of the gas without significant additional losses.
KW - Fermi gas
KW - Laser cooling
UR - http://www.scopus.com/inward/record.url?scp=0038060487&partnerID=8YFLogxK
U2 - 10.1088/1464-4266/5/2/379
DO - 10.1088/1464-4266/5/2/379
M3 - Article
AN - SCOPUS:0038060487
VL - 5
SP - S190-S198
JO - Journal of Optics B: Quantum and Semiclassical Optics
JF - Journal of Optics B: Quantum and Semiclassical Optics
SN - 1464-4266
IS - 2
ER -