2006/09/30 by Krzysztof Gawryluk, Mirosław Brewczyk, Kai Bongs +3 · 4 citations
Physics and Astronomy · #Angular momentum #Atomic and Subatomic Physics Research #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Condensed matter physics #Degrees of freedom (physics and chemistry) #Dipole #Excited state #Kinetic energy #Magnetic field #Materials science #Observable #Physics #Quantum mechanics #Quantum optics and atomic interactions #Quantum, superfluid, helium dynamics #Realization (probability) #Rotational energy #Rubidium #Spin (aerodynamics) #Zeeman effect #cond-mat.other
paper · pdf · doi:10.1103/physrevlett.99.130401
published as Phys. Rev. Lett. 99, 130401 (2007) · 4 pages, 5 figures
arxiv created 2007/03/13 · arxiv updated 2009/12/01 · openalex publication_date 2012/05/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/06/11
We theoretically consider a spin polarized, optically trapped condensate of 87Rb atoms in F=1. We observe a transfer of atoms to other Zeeman states due to the dipolar interaction which couples the spin and the orbital degrees of freedom. Therefore the transferred atoms acquire an orbital angular momentum. This is a realization of the Einstein-de Haas effect in systems of cold gases. We find resonances which make this phenomenon observable even in very weak dipolar systems, when the Zeeman energy difference on transfer is fully converted to rotational kinetic energy.