Narrow Linewidth Laser Cooling via Adiabatic Transfer

ORAL

Abstract

We simulate and provide a theoretical framework for a new cooling method applicable to particles with narrow-linewidth optical transitions. The particles are adiabatically transferred to lower momentum states upon interaction with counter-propagating laser beams that are repeatedly swept over the transition frequency. A reduced reliance on spontaneous emission (compared to Doppler cooling) allows for larger slowing forces. Cooling via a 7.6 kHz dipole forbidden transition in Strontium-88 is simulated using one-dimensional quantum jump and c-number Langevin equation methods. This ``sweep cooling" mechanism also shows promise for application to systems lacking closed cycling transitions, such as molecules.

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Authors

  • John Bartolotta

    Department of Physics and JILA, University of Colorado, Boulder

  • Murray Holland

    JILA, CU Boulder, Department of Physics and JILA, University of Colorado, Boulder, JILA, NIST, and Department of Physics, University of Colorado Boulder, Boulder

  • Matthew Norcia

    Department of Physics and JILA, University of Colorado, Boulder

  • James Thompson

    CU-Boulder, Department of Physics and JILA, University of Colorado, Boulder

  • Julia Cline

    Department of Physics and JILA, University of Colorado, Boulder