Gravito-optical trap for cold atoms with doughnut-hollow-beam cooling Article

cited authors

  • Yin, J; Zhu, Y; Wang, Y

fiu authors

abstract

  • We present a simple gravito-optical atom trap consisting of a blue-detuned, conical doughnut-hollow beam and the gravity field. Cold atoms are loaded into the doughnut-hollow beam from a magnetic-optical trap and cooled by Sisyphus cooling and geometric cooling induced by the doughnut-hollow beam and a weak repumping beam. We calculate the light-shift potential for atoms confined in the doughnut-hollow beam, analyze the cooling and heating mechanisms in the trap and estimate the trap losses. Our study shows that an ultra-cold atomic sample with an equilibrium 3D rms momentum of about 2.5 (Latin small letter h with stroke)k (a temperature of ∼ 1 μK) may be obtained in the trap. © 1998 Published by Elsevier Science B.V.

publication date

  • November 16, 1998

Digital Object Identifier (DOI)

start page

  • 309

end page

  • 318

volume

  • 248

issue

  • 5-6