Tunneling-induced spectral broadening of a single atom in a three-dimensional optical lattice |
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| Authors: | Kim Wookrae Park Changwon Kim Jung-Ryul Choi Youngwoon Kang Sungsam Lim Sooin Lee Yea-Lee Ihm Jisoon An Kyungwon |
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| Affiliation: | Department of Physics and Astronomy, Seoul National University, Seoul, Korea. |
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| Abstract: | We have investigated the spectral broadening in the near-resonance fluorescence spectrum of a single rubidium atom trapped in a three-dimensional (3D) optical lattice in a strong Lamb-Dicke regime. Besides the strong Rayleigh peak, the spectrum exhibited weak Stokes and anti-Stokes Raman sidebands. The line width of the Rayleigh peak for low potential depths was well explained by matter-wave tunneling between the first-two lowest vibrational states of 3D anisotropic harmonic potentials of adjacent local minima of the optical lattice. |
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