منابع مشابه
Polaritonic Feshbach resonance
A Feshbach resonance occurs when the energy of two interacting free particles comes into resonance with a molecular bound state. When approaching this resonance, marked changes in the interaction strength between the particles can arise. Feshbach resonances provide a powerful tool for controlling the interactions in ultracold atomic gases, which can be switched from repulsive to attractive1–4, ...
متن کاملFour-boson scale near a Feshbach resonance
– We show that an independent four-body momentum scale μ(4) drives the tetramer binding energy for fixed trimer energy (or three-body scale μ(3)) and large scattering length (a). The threeand four-body forces from the one-channel reduction of the atomic interaction near a Feshbach resonance disentangle μ(4) and μ(3). The four-body independent scale is also manifested through a family of Tjon li...
متن کاملHigh resolution feshbach spectroscopy of cesium
We measure high-resolution Feshbach resonance spectra for ultracold cesium atoms colliding in different hyperfine and magnetic sublevels. More than 25 resonances are observed for magnetic fields up to 230 G and their positions are measured with an accuracy down to 0.03 G. From these spectra several ground-state molecular interaction parameters can be extracted with sufficient accuracy to permit...
متن کاملPrecision Feshbach spectroscopy of ultracold Cs2
We have observed and located more than 60 magnetic field-induced Feshbach resonances in ultracold collisions of ground-state Cs atoms. Multiple extremely weak Feshbach resonances associated with g-wave molecular states are detected through variations in the radiative collision cross sections. The Feshbach spectroscopy allows us to determine the interactions between ultracold cesium atoms and th...
متن کاملPhotoassociation of a Bose-Einstein condensate near a Feshbach resonance.
We measure the effect of a magnetic Feshbach resonance (FR) on the rate and light-induced frequency shift of a photoassociation resonance in ultracold 7Li. The photoassociation-induced loss-rate coefficient K_{p} depends strongly on magnetic field, varying by more than a factor of 10;{4} for fields near the FR. At sufficiently high laser intensities, K_{p} for a thermal gas decreases with incre...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2005
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.72.010704