Heteronuclear Efimov resonances in ultracold quantum gases

Observation of heteronuclear atomic Efimov resonances.

Building on the recent experimental observation with ultracold atoms, we report the first experimental evidence of Efimov physics in a heteronuclear system. A mixture of ;{41}K and ;{87}Rb atoms was cooled to few hundred nanokelvins and stored in an optical dipole trap. Exploiting a broad interspecies Feshbach resonance, the losses due to three-body collisions were studied as a function of the ...

Feshbach Resonances in Ultracold Gases

Feshbach resonances are the essential tool to control the interaction between atoms in ultracold quantum gases. They have found numerous experimental applications, opening up the way to important breakthroughs. This Review broadly covers the phenomenon of Feshbach resonances in ultracold gases and their main applications. This includes the theoretical background and models for the description o...

Feshbach resonances in ultracold mixtures of the fermionic quantum gases

Ultracold Quantum Gases

1. Apparatus for studying Fermi-Fermi-Bose mixtures in optical lattices We have completed the assembly of a new apparatus that can simultaneously cool and trap two different fermionic species, Li and K, as well as K. The cold atom sources are also able to provide Rb and Na in the future. One major interest lies in the creation of heteronuclear, stable ground-state molecules that carry a strong ...

Quantum simulations with ultracold quantum gases

Ultracold quantum gases offer a unique setting for quantum simulation of interacting many-body systems. The high degree of controllability, the novel detection possibilities and the extreme physical parameter regimes that can be reached in these ‘artificial solids’ provide an exciting complementary set-up compared with natural condensed-matter systems, much in the spirit of Feynman’s vision of ...