Hyperfine Spectroscopy of Optically Trapped Atoms

Abstract

We perform spectroscopy on the hyperfine splitting of ${}^{85}$Rb atoms trapped in far-off-resonance optical traps. The existence of a spatially dependent shift in the energy levels is shown to induce an inherent dephasing effect, which causes a broadening of the spectroscopic line and hence an inhomogeneous loss of atomic coherence at a much faster rate than the homogeneous one caused by spontaneous photon scattering. We present here a number of approaches for reducing this inhomogeneous broadening, based on trap geometry, additional laser fields, and novel microwave pulse sequences. We then show how hyperfine spectroscopy can be used to study quantum dynamics of optically trapped atoms.

Review/Tutorial

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Cited by in corpus (8)

• Cold atom confinement in an all-optical dark ring trap
• Thermometry via Light Shifts in Optical Lattices
• Generic Short-Time Propagation of Sharp-Boundaries Wave Packets
• Magic polarization for optical trapping of atoms without Stark-induced dephasing
• Faraday spectroscopy of atoms confined in a dark optical trap
• Quantum chaos of a mixed, open system of kicked cold atoms
• Transverse Mode Revival of a Light-Compensated Quantum Memory
• Effects of interactions on the dynamics of driven cold atoms