Extreme Tunability of Interactions in a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Li</mml:mi><mml:mprescripts /><mml:none /><mml:mn>7</mml:mn></mml:mmultiscripts></mml:math>Bose-Einstein Condensate

Pollack, S. E.; Dries, D.; Junker, M.; Chen, Y. P.; Corcovilos, Theodore A.; Hulet, R. G.

doi:10.1103/physrevlett.102.090402

Cited by 259 publications

(274 citation statements)

References 32 publications

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“…On the other hand, the scattering length a 77 between 7 Li atoms strongly depends on the magnetic eld value because of the existence of a 200-G-wide Feshbach resonance centered at 737 G [119,120,130]. At the magnetic eld B = 834 G corresponding to the center of the 6 Li Feshbach resonance, the scattering length value is a 77 = −73 a 0 .…”

Section: Two-species Evaporation and Thermalizationmentioning

confidence: 99%

Thermodynamics of Ultracold Fermi Gases

Nascimbène

Navon

Chevy

et al. 2010

Latin America Optics and Photonics Conference

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Section: Two-species Evaporation and Thermalizationmentioning

confidence: 99%

Thermodynamics of Ultracold Fermi Gases

Nascimbène

Navon

Chevy

et al. 2010

Latin America Optics and Photonics Conference

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“…For experimental purposes, large values of the effective scattering length may be obtained by using Feshbach resonances to control the free space scattering length a [9]. Recently a > 1µm has been obtained with Li gases [33].…”

Section: Discussionmentioning

confidence: 99%

Quantitative study of two- and three-dimensional strong localization of matter waves by atomic scatterers

Antezza

Hutchinson

2010

Phys. Rev. A

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We study the strong localization of atomic matter waves in a disordered potential created by atoms pinned at the nodes of a lattice, for both three-dimensional (3D) and two-dimensional (2D) systems. The localization length of the matter wave, the density of localized states, and the occurrence of energy mobility edges (for the 3D system), are numerically investigated as a function of the effective scattering length between the atomic matter wave and the pinned atoms. Both positive and negative matter wave energies are explored. Interesting features of the density of states are discovered at negative energies, where maxima in the density of bound states for the system can be interpreted in terms of bound states of a matter wave atom with a few pinned atomic scatterers. In 3D we found evidence of up to three mobility edges, one at positive energies, and two at negative energies, the latter corresponding to transitions between extended and localized bound states. In 2D, no mobility edge is found, and a rapid exponential-like increase of the localization length is observed at high energy.

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“…Remarkable effects of the magnetic DDI have been reported in recent experiments on chromium BEC [10][11][12][13]. Alkali-metal atoms, on the contrary, present a much lower magnetic dipole moment, µ = µ B /2, and hence they are not usually expected to show any trace of the DDI unless short-range interactions are switched off by means of Feshbach resonances [14,15]. However, as mentioned earlier, the spin-changing collisions in alkali-metal spinor BECs (in particular F = 1 87 Rb) are remarkably low energetic.…”

Section: Introductionmentioning

confidence: 97%

Parametric amplification of matter waves in dipolar spinor Bose-Einstein condensates

Deuretzbacher¹,

Gebreyesus²,

Topic³

et al. 2010

Phys. Rev. A

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Spin-changing collisions may lead under proper conditions to the parametric amplification of matter waves in spinor Bose-Einstein condensates. Magnetic dipole-dipole interactions, although typically very weak in alkalimetal atoms, are shown to play a very relevant role in the amplification process. We show that these interactions may lead to a strong dependence of the amplification dynamics on the angle between the trap axis and the magnetic-field orientation. We analyze as well the important role played by magnetic-field gradients, which also modify strongly the amplification process. Magnetic-field gradients, hence, must be carefully controlled in future experiments, in order to observe clearly the effects of the dipolar interactions in the amplification dynamics.

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Extreme Tunability of Interactions in aLi7Bose-Einstein Condensate

Cited by 259 publications

References 32 publications

Thermodynamics of Ultracold Fermi Gases

Thermodynamics of Ultracold Fermi Gases

Quantitative study of two- and three-dimensional strong localization of matter waves by atomic scatterers

Parametric amplification of matter waves in dipolar spinor Bose-Einstein condensates

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