Losses of thulium atoms from optical dipole traps operating at 532 and 1064 nm

Abstract

Recently thulium has been condensed to Bose-Einstein condensate. Machine learning was used to avoid a detailed study of all obstacles making cooling difficult. This paper analyses the atomic loss mechanism for the 532 nm optical trap, used in the Bose-condensation experiment, and compares it with the alternative and more traditional micron-range optical dipole trap. We also measured the scalar and tensor polarizability of thulium at 1064 nm and was found to be $167\pm 25$ a.u. ($275\pm 41\times {10}^{-41}\text{F }\cdot {\text{m}}^{\text{2}}$) and $-4\pm 1$ a.u. ($7\pm 2\times {10}^{-41}\text{F }\cdot {\text{m}}^{\text{2}}$).

References in corpus (6)

• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Anisotropic polarizability of erbium atoms
• Anisotropic dependence of tune-out wavelength near Dy 741-nm transition
• Light assisted collisions in ultra-cold Tm atoms
• Light Assisted Collisional Loss in a ${}^{85/87}$Rb Ultracold Optical Trap
• Characterizing the temperature dependence of Fano-Feshbach resonances of Ultracold Polarized Thulium