title: Tunneling-induced spectral broadening of a single atom in a three-dimensional optical lattice.
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.
authors.affiliation: Department of Physics and Astronomy, Seoul National University, Seoul, Korea.
authors.forename: Wookrae
authors.initials: W
authors.lastname: Kim
authors.forename: Changwon
authors.initials: C
authors.lastname: Park
authors.forename: Jung-Ryul
authors.initials: JR
authors.lastname: Kim
authors.forename: Youngwoon
authors.initials: Y
authors.lastname: Choi
authors.forename: Sungsam
authors.initials: S
authors.lastname: Kang
authors.forename: Sooin
authors.initials: S
authors.lastname: Lim
authors.forename: Yea-Lee
authors.initials: YL
authors.lastname: Lee
authors.forename: Jisoon
authors.initials: J
authors.lastname: Ihm
authors.forename: Kyungwon
authors.initials: K
authors.lastname: An
mesh_terms: D004579:Electron Transport; D004867:Equipment Design; D019544:Equipment Failure Analysis; D012666:Semiconductors