Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Goral, Krzysztof"'
Publikováno v:
Physical Review A 74, 023618 (2006)
We study the dissociation of Feshbach molecules by a magnetic field sweep across a zero-energy resonance. In the limit of an instantaneous magnetic field change, the distribution of atomic kinetic energy can have a peak indicating dominance of the mo
Externí odkaz:
http://arxiv.org/abs/cond-mat/0605143
Publikováno v:
Rev. Mod. Phys. 78, 1311 (2006)
Magnetically tunable Feshbach resonances were employed to associate cold diatomic molecules in a series of experiments involving both atomic Bose as well as two spin component Fermi gases. This review illustrates theoretical concepts of both the part
Externí odkaz:
http://arxiv.org/abs/cond-mat/0601420
Publikováno v:
Phys.Rev.A72:013610,2005
We use the standard fermionic and boson-fermion Hamiltonians to study the BCS-BEC cross-over near the 202 G resonance in a two-component mixture of fermionic 40K atoms employed in the experiment of C.A. Regal et al., Phys. Rev. Lett. 92, 040403 (2004
Externí odkaz:
http://arxiv.org/abs/cond-mat/0501728
Publikováno v:
Phys. Rev. Lett. 93, 260403 (2004)
We provide a practical approach to the molecular production via linear downward sweeps of Feshbach resonances in degenerate Fermi gases containing incoherent mixtures of two atomic spin states. We show that the efficiency of the association of atoms
Externí odkaz:
http://arxiv.org/abs/cond-mat/0409192
Publikováno v:
Phys. Rev. A 71, 023603 (2005)
We discuss the frequency and visibility of atom-molecule Ramsey fringes observed in recent experiments by Claussen et al.[Phys. Rev. A 67, 060701 (2003)]. In these experiments a 85Rb Bose-Einstein condensate was exposed to a sequence of magnetic fiel
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407627
Publikováno v:
J. Phys. B 37, 3457 (2004)
We consider in detail the situation of applying a time dependent external magnetic field to a 87Rb atomic Bose-Einstein condensate held in a harmonic trap, in order to adiabatically sweep the interatomic interactions across a Feshbach resonance to pr
Externí odkaz:
http://arxiv.org/abs/cond-mat/0312178
Publikováno v:
J. Mod. Opt. 51, 1731 (2004)
The Gross-Pitaevskii equation has been extremely successful in the theory of weakly-interacting Bose-Einstein condensates. However, present-day experiments reach beyond the regime of its validity due to the significant role of correlations. We review
Externí odkaz:
http://arxiv.org/abs/cond-mat/0311659
Publikováno v:
Phys. Rev. A 70, 023613 (2004)
The production of pairs of fast atoms leads to a pronounced loss of atoms during upward ramps of Feshbach resonance levels in dilute Bose-Einstein condensates. We provide comparative studies on the formation of these bursts of atoms containing the ph
Externí odkaz:
http://arxiv.org/abs/cond-mat/0305060