Coherence and Raman Sideband Cooling of a Single Atom in an Optical Tweezer
Author(s)Thompson, J. D.; Tiecke, T. G.; Zibrov, A. S.; Lukin, M. D.; Vuletic, V.
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We investigate quantum control of a single atom in a tightly focused optical tweezer trap. We show that inevitable spatially varying polarization gives rise to significant internal-state decoherence but that this effect can be mitigated by an appropriately chosen magnetic bias field. This enables Raman sideband cooling of a single atom close to its three-dimensional ground state (vibrational quantum numbers n̅ [subscript x]=n̅ [subscript y]=0.01, n̅ [subscript z]=8) even for a trap beam waist as small as w=900 nm. The small atomic wave packet with δx=δy=24 nm and δz=270 nm represents a promising starting point for future hybrid quantum systems where atoms are placed in close proximity to surfaces.
DepartmentHarvard-MIT Center for Ultracold Atoms; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Research Laboratory of Electronics
Physical Review Letters
American Physical Society
Thompson, J. D., T. G. Tiecke, A. S. Zibrov, V. Vuletić, and M. D. Lukin. Coherence and Raman Sideband Cooling of a Single Atom in an Optical Tweezer. Physical Review Letters 110, no. 13 (March 2013). © 2013 American Physical Society
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