J
James C. Bergquist
Researcher at National Institute of Standards and Technology
Publications - 111
Citations - 8627
James C. Bergquist is an academic researcher from National Institute of Standards and Technology. The author has contributed to research in topics: Laser & Ion. The author has an hindex of 39, co-authored 111 publications receiving 8143 citations.
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Minimization of ion micromotion in a Paul trap
TL;DR: In this paper, three methods of detecting micromotion of ions in Paul traps have been described, including the change of the average ion position as the trap potentials are changed, and the amplitude of the sidebands of a narrow atomic transition, caused by the first-order Doppler shift due to the ion's ion motion.
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Laser Cooling to the Zero-Point Energy of Motion
TL;DR: A single trapped 198 Hg + ion was cooled by scattering laser radiation that was tuned to the resolved lower motional sideband of the narrow 2 S 1/2 - 2 D 5/2 transition to indicate that the ion was in the ground state of its confining well approximately 95% of the time.
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Visible lasers with subhertz linewidths
TL;DR: In this paper, the authors reported a visible laser with a subhertz linewidth of 0.6 Hz for averaging times up to 32 s. The authors derived their stability from a well-isolated, high-finesse, Fabry-P\'erot cavity.
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Observation of quantum jumps in a single atom
TL;DR: The statistical properties of the quantum jumps are investigated; for example, photon antibunching in the emission from the D state is observed with 100% efficiency.
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Spectroscopy Using Quantum Logic
Piet O. Schmidt,Till Rosenband,Christopher Langer,Wayne M. Itano,James C. Bergquist,David J. Wineland +5 more
TL;DR: Experimental realization of the general technique for precision spectroscopy of atoms that lack suitable transitions for efficient laser cooling, internal state preparation, and detection indicates the feasibility of applying this technique to make accurate optical clocks based on single ions.