Magic polarization for optical trapping of atoms without Stark-induced dephasing

Abstract

We demonstrate that the differential ac-Stark shift of a ground-state hyperfine transition in an optical trap can be eliminated by using properly polarized trapping light. We use the vector polarizability of an alkali-metal atom to produce a polarization-dependent ac-Stark shift that resembles a Zeeman shift. We study a transition from the |2S1/2,F=2,mF=-2> to the |2S1/2,F=1,mF=-1> state of 7Li to observe 0.59+-0.02 Hz linewidth with interrogation time of 2 s and 0.82+-0.06 s coherence time of a superposition state. Implications of the narrow linewidth and the long coherence time for precision spectroscopy and quantum information processing using atoms in an optical lattice are discussed.

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• Analysis of dephasing mechanisms in a standing wave dipole trap
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• Observation of a narrow inner-shell orbital transition in atomic erbium at 1299 nm
• Elliptical polarization for molecular Stark shift compensation in deep optical traps
• Triply magic conditions for microwave transitions of optically trapped alkali-metal atoms
• Production of large Bose-Einstein condensates in a magnetic-shield-compatible hybrid trap
• Magic polarization for light shift cancellation in two-photon optical clocks
• Extending the coherence time limit of a single-alkali-atom qubit by suppressing phonon-jumping-induced decoherence
• Measurement and extinction of vector light shifts using interferometry of spinor condensates
• Eliminating qubit type cross-talk in the $\text{omg}$ protocol
• Vector polarizability of atomic state induced by a linearly polarized vortex beam: External control of magic, tune-out wavelengths, and heteronuclear spin oscillations
• Gate fidelity, dephasing, and "magic" trapping of optically trapped neutral atom
• Precision Polarization Tuning for Light Shift Mitigation in Trapped-Ion Qubits
• Nuclear-Spin Dependent Parity Violation in Optically Trapped Polyatomic Molecules
• Use of vector polarizability to manipulate alkali-metal atoms
• Transmission spectroscopy of a single atom in the presence of tensor light shifts
• Fluorescence detection of single lithium atoms in an optical lattice using Doppler-cooling beams
• Engineered Molecular Clock Transitions for Symmetry Violation Searches