We present measurements of interspecies Feshbach resonances and subsequent creation of dual-species Bose-Einstein condensates of Na23 and K39. We prepare both optically trapped ensembles in the spin state f=1,mf=-1 and perform atom loss spectroscopy in a magnetic field range from 0 to 700G. The observed features include several s-wave poles and a zero crossing of the interspecies scattering length as well as inelastic two-body contributions in the M=mNa+mK=-2 submanifold. We identify and discuss the suitability of different magnetic field regions for the purposes of sympathetic cooling of K39 and achieving dual-species degeneracy. Two condensates are created simultaneously by evaporation at a magnetic field of about 150G, which provides sizable intra- and interspecies scattering rates needed for fast thermalization. The impact of the differential gravitational sag on the miscibility criterion for the mixture is discussed. Our results serve as a promising starting point for the magnetoassociation into quantum degenerate Na23K39 Feshbach molecules.
Feshbach spectroscopy and dual-species Bose-Einstein condensation of Na 23 - K 39 mixtures / Schulze, T. A.; Hartmann, T.; Voges, K. K.; Gempel, M. W.; Tiemann, E.; Zenesini, A.; Ospelkaus, S.. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 97:2(2018). [10.1103/PhysRevA.97.023623]
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Titolo: | Feshbach spectroscopy and dual-species Bose-Einstein condensation of Na 23 - K 39 mixtures | |
Autori: | Schulze, T. A.; Hartmann, T.; Voges, K. K.; Gempel, M. W.; Tiemann, E.; Zenesini, A.; Ospelkaus, S. | |
Autori Unitn: | ||
Titolo del periodico: | PHYSICAL REVIEW A | |
Anno di pubblicazione: | 2018 | |
Numero e parte del fascicolo: | 2 | |
Codice identificativo Scopus: | 2-s2.0-85042130456 | |
Codice identificativo WOS: | WOS:000424896100011 | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevA.97.023623 | |
Handle: | http://hdl.handle.net/11572/344251 | |
Citazione: | Feshbach spectroscopy and dual-species Bose-Einstein condensation of Na 23 - K 39 mixtures / Schulze, T. A.; Hartmann, T.; Voges, K. K.; Gempel, M. W.; Tiemann, E.; Zenesini, A.; Ospelkaus, S.. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 97:2(2018). [10.1103/PhysRevA.97.023623] | |
Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |