Laser Cooling and Quantum Gas

The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics

, Volume 39, Issue 1, pp 67-74

First online:

A nonadiabatic semi-classical method for dynamics of atoms in optical lattices

  • S. JonsellAffiliated withDepartment of Physics, Umeå University Email author 
  • , C. M. DionAffiliated withDepartment of Physics, Umeå University
  • , M. NylénAffiliated withDepartment of Physics, Umeå University
  • , S. J.H. PetraAffiliated withDepartment of Physics, Umeå University
  • , P. SjölundAffiliated withDepartment of Physics, Umeå University
  • , A. KastbergAffiliated withDepartment of Physics, Umeå University

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Abstract.

We develop a semi-classical method to simulate the motion of atoms in a dissipative optical lattice. Our method treats the internal states of the atom quantum mechanically, including all nonadiabatic couplings, while position and momentum are treated as classical variables. We test our method in the one-dimensional case. Excellent agreement with fully quantum mechanical simulations is found. Our results are much more accurate than those of earlier semi-classical methods based on the adiabatic approximation.

PACS.

32.80.Pj Optical cooling of atoms; trapping 03.65.Sq Semiclassical theories and applications