2010/03/19 by P. G. Mickelson, Y. N. Martinez de Escobar, Mi Yan +3 · 2 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Atomic physics #Bioinformatics #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensation #Condensed matter physics #Degeneracy (biology) #Dipole #Ground state #Pauli exclusion principle #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Spin (aerodynamics) #Thermodynamics #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.81.051601
published as Physical Review A 81, 051601(R) (2010) · 4 pages, 4 figures
arxiv created 2010/03/19 · openalex publication_date 2010/05/05 · arxiv updated 2012/09/06 · openalex created_date 2016/09/16 · openalex updated_date 2026/08/05
We report Bose-Einstein condensation of 88Sr, which has a small, negative s-wave scattering length (a88=\ensuremath-2a0). We overcome the poor evaporative cooling characteristics of this isotope by sympathetic cooling with 87Sr atoms. 87Sr is effective in this role despite the fact that it is a fermion because of the large ground-state degeneracy arising from a nuclear spin of I=9/2, which reduces the impact of Pauli blocking of collisions. We observe a limited number of atoms in the condensate (Nmax\ensuremath≈104) that is consistent with the value of a88 and the optical dipole trap parameters.