Zobrazeno 1 - 10
of 82
pro vyhledávání: '"James C. Bergquist"'
Publikováno v:
International Journal of Mass Spectrometry. 377:403-409
The observation of intermittent fluorescence of a single atomic ion, a phenomenon better known as ‘macroscopic quantum jumps,’ was an important early scientific application of the three-dimensional rf quadrupole (Paul) trap. The prediction of the
Autor:
James C. Bergquist, Fred L. Walls, David J. Wineland, Thomas E. Parker, John J. Bollinger, Wayne M. Itano, D. M. Meekhof, Robert E. Drullinger, Jefferts, W D. Lee, D. B. Sullivan
Publikováno v:
Journal of Research of the National Institute of Standards and Technology
The development of atomic frequency standards at NIST is discussed and three of the key frequency-standard technologies of the current era are described. For each of these technologies, the most recent NIST implementation of the particular type of st
Autor:
Joseph W. Britton, Dietrich Leibfried, Robert Maiwald, Gerd Leuchs, James C. Bergquist, David J. Wineland
Publikováno v:
Nature Physics. 5:551-554
An ion trap has been built and characterized in which the atom sits on the top of a stylus-like electrode. The design should find application in the construction of efficient light–matter interfaces and field sensors, where good access to the ion i
Autor:
Leo W. Hollberg, S. Bize, Robert E. Drullinger, U Tanaka, Scott A. Diddams, David J. Wineland, Wayne M. Itano, Carol E. Tanner, James C. Bergquist
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 36:545-551
We report on work directed toward the systematic evaluation of an optical frequency standard based on the 2 S1/2– 2 D5/2 transition of a single, laser-cooled, trapped 199 Hg + ion, whose resonance frequency is 1.06 × 10 15 Hz. For the purpose of t
Publikováno v:
Physical Review Letters. 82:3799-3802
We report a visible laser with a subhertz linewidth for use in precision spectroscopy and as a local oscillator for an optical frequency standard. The laser derives its stability from a well-isolated, high-finesse, Fabry-P\'erot cavity. For a 563 nm
Publikováno v:
Journal of Applied Physics. 83:5025-5033
Micromotion of ions in Paul traps has several adverse effects, including alterations of atomic transition line shapes, significant second-order Doppler shifts in high-accuracy studies, and limited confinement time in the absence of cooling. The ac el
Publikováno v:
Physical Review Letters. 80:2089-2092
A stable and accurate frequency standard based on the 40.5 GHz ground-state hyperfine transition in 199Hg1 ions is described. The ions are confined in a cryogenic linear Paul (rf ) trap and laser cooled to form a linear crystal. With seven ions and a
Publikováno v:
Physical Review A. 87
We characterize the frequency sensitivity of a cavity-stabilized laser to inertial forces and temperature fluctuations, and perform real-time feedforward to correct for these sources of noise. We measure the sensitivity of the cavity to linear accele
Publikováno v:
Optics Communications. 123:207-214
We present a study of the efficiency and optimization of cw second harmonic generation by elliptical Gaussian laser beams. Elliptical focusing slightly improves conversion efficiency and reduces crystal damage risk when heavy walk-off is present. Sin
Publikováno v:
Physica Scripta. :286-293
Quantum mechanical effects which are manifested in measurements on trapped atomic ions are reviewed. Observation of these effects is facilitated by the long storage times of a fixed number of laser-cooled ions and by high detection sensitivities, pri