2,973 research outputs found
Magnetic Field Dependence and Efimov Resonance Broadening in Ultracold Three-Body Recombination
We derive an analytic formula which describes the final bound state
dependence in ultracold three-body recombination. Using an energy-dependent
loss parameter, the recently observed broad resonance in an ultracold gas of
Li atoms [T. B. Ottenstein {\it et al.}, Phys. Rev. Lett. 101, 203202
(2008)l J. H. Huckans {\it et al.}, Phys. Rev. Lett. 102, 165302 (2009)] is
described quantitatively. We also provide an analytic and approximation for the
three-body recombination rate which encapsulates the underlying physics of the
universal three-body recombination process.Comment: 4 pages, 4 figure
Ultracold giant polyatomic Rydberg molecules: coherent control of molecular orientation
We predict the existence of a class of ultracold giant molecules formed from
trapped ultracold Rydberg atoms and polar molecules. The interaction which
leads to the formation of such molecules is the anisotropic charge-dipole
interaction (). We show that prominent candidate molecules such as KRb
and deuterated hydroxyl (OD) should bind to Rydberg rubidium atoms, with
energies GHz at distances m. These
molecules form in double wells, mimicking chiral molecules, with each well
containing a particular dipole orientation. We prepare a set of correlated
dressed electron-dipole eigenstates which are used in a resonant Raman scheme
to coherently control the dipole orientation and to create cat-like entangled
states of the polar molecule.Comment: 4 pages, 4 figure
Green's Functions and the Adiabatic Hyperspherical Method
We address the few-body problem using the adiabatic hyperspherical
representation. A general form for the hyperangular Green's function in
-dimensions is derived. The resulting Lippmann-Schwinger equation is solved
for the case of three-particles with s-wave zero-range interactions. Identical
particle symmetry is incorporated in a general and intuitive way. Complete
semi-analytic expressions for the nonadiabatic channel couplings are derived.
Finally, a model to describe the atom-loss due to three-body recombination for
a three-component fermi-gas of Li atoms is presented.Comment: 14 pages, 8 figures, 2 table
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