# Coherence and Raman Sideband Cooling of a Single Atom in an Optical Tweezer

 Title: Coherence and Raman Sideband Cooling of a Single Atom in an Optical Tweezer Author: Thompson, Jeffrey Douglas; Tiecke, Tobias; Zibrov, Alexander S; Vuletić, V.; Lukin, Mikhail D. Note: Order does not necessarily reflect citation order of authors. Citation: Thompson, J., T. Tiecke, A. Zibrov, V. Vuletić, and M. Lukin. 2013. Coherence and Raman Sideband Cooling of a Single Atom in an Optical Tweezer. Physical Review Letters 110(13): 133001. Full Text & Related Files: Thompson_CoherenceRaman.pdf (337.0Kb; PDF) Abstract: 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 $$\bar n_x=\bar n_y=0.01, \bar n_z=8)$$ even for a trap beam waist as small as $$\omega=900 nm$$. The small atomic wave packet with $$\delta x=\delta y=24 nm$$ and $$\delta z=270 nm$$ represents a promising starting point for future hybrid quantum systems where atoms are placed in close proximity to surfaces. Published Version: doi:10.1103/PhysRevLett.110.133001 Other Sources: http://arxiv.org/abs/1209.3028 Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:12563779 Downloads of this work: