Results 21 to 30 of about 4,797 (280)

A Traceable High-Accuracy Velocity Measurement by Electro-Optic Dual-Comb Interferometry

Applied Sciences, 2019
An electro-optic dual-comb Doppler velocimeter for high-accuracy velocity measurement is presented in this paper. The velocity information of the object can be accurately extracted from the change of repetition frequency, which is in the microwave ...
Bin Xue, Haoyun Zhang, Tuo Zhao, Haoming Jing   +3 more
doaj   +1 more source

Compact and frequency stabilized laser heads for Rubidium atomic clocks [PDF]

International Conference on Space Optics — ICSO 2012, 2017
We present the development and complete spectral characterization of our compact and frequency-stabilized laser heads, to be used for rubidium atomic clocks and basic spectroscopy. The light source is a Distributed Feed-Back (DFB) laser diode emitting at 780 nm or 795 nm.
Gaetano Mileti, Renaud Matthey, Thejesh Bandi, Christoph Affolderbach, Matthieu Pellaton, Florian Gruet   +5 more
openaire   +1 more source

Berry-phase gates for fast and robust control of atomic clock states

Physical Review Research, 2020
We propose and experimentally demonstrate a fast Berry-phase gate, which is implemented by picosecond-timescale optical pulses to make the qubit system of atomic clock states adiabatically evolve on a closed loop.
Yunheung Song, Jongseok Lim, Jaewook Ahn
doaj   +1 more source

The ⁸⁷Rubidium Atomic Clock Maser in Giant Stars [PDF]

Research Notes of the AAS, 2018
We conducted a Green Bank Telescope search for the ground state 6.8 GHz hyperfine transition of rubidium ($^{87}$Rb) toward giant stars detected in Rb I optical resonance lines. The spin-flip transition of $^{87}$Rb is one of the principal transitions used in atomic clocks, in addition to the hydrogen 21 cm maser and the $^{133}$Cs hyperfine transition
openaire   +2 more sources

Search for Possible Variation of the Fine Structure Constant [PDF]

, 2003
Determination of the fine structure constant alpha and search for its possible variation are considered. We focus on a role of the fine structure constant in modern physics and discuss precision tests of quantum electrodynamics.
B.N. Taylor, B.N. Taylor, Chr. Tamm, D.J. Berkland, D.J. Fixsen, E. Peik, G. Wilpers, G.W.F. Drake, H. Marion, H. Schnatz, H.S. Margolis, J. Stenger, J. von Zanthier, J.-P. Uzan, J.D. Prestage, J.J. Bollinger, J.K. Webb, K. Hagiwara, M.C. George, M.P. Savedoff, N.E. Rothery, P. Langacker, P.J. Mohr, R.I. Thompson, S. Bize, S.G. Karshenboim, S.G. Karshenboim, Savely G. Karshenboim, T. Beier, T. Kinoshita, T. Udem, Th. Udem, W.J. Marciano   +32 more
core   +1 more source

Subpicosecond $X$ rotations of atomic clock states

, 2018
We demonstrate subpicosecond-time-scale population transfer between the pair of hyperfine ground states of atomic rubidium using a single laser-pulse. Our scheme utilizes the geometric and dynamic phases induced during Rabi oscillation through the fine ...
Ahn, Jaewook, Jo, Hanlae, Kim, Hyosub, Lee, Han-gyeol, Song, Yunheung   +4 more
core   +1 more source

Progress in Atomic Fountains at LNE-SYRTE [PDF]

, 2012
We give an overview of the work done with the Laboratoire National de M\'etrologie et d'Essais-Syst\`emes de R\'ef\'erence Temps-Espace (LNE-SYRTE) fountain ensemble during the last five years.
A. Clairon, A. Clairon, A. Clairon, A. Clairon, A. Clairon, A. Clairon, A. Clairon, A. Clairon, A. Clairon, A. Clairon, A. Clairon, A. Clairon, A. Clairon, B. Chupin, B. Chupin, B. Chupin, B. Chupin, B. Chupin, B. Chupin, B. Chupin, B. Chupin, B. Chupin, B. Chupin, B. Chupin, B. Chupin, B. Chupin, D Rovera, D Rovera, D Rovera, D Rovera, D Rovera, D Rovera, D Rovera, D Rovera, D Rovera, D Rovera, D Rovera, D Rovera, D. Rovera, G. Santarelli, G. Santarelli, G. Santarelli, G. Santarelli, G. Santarelli, G. Santarelli, G. Santarelli, G. Santarelli, G. Santarelli, G. Santarelli, G. Santarelli, G. Santarelli, G. Santarelli, J. Guena, J. Guéna, J. Guéna, J. Guéna, J. Guéna, J. Guéna, J. Guéna, J. Guéna, J. Guéna, J. Guéna, J. Guéna, J. Guéna, J. Guéna, K. Gibble, K. Gibble, K. Gibble, K. Gibble, K. Gibble, K. Gibble, K. Gibble, K. Gibble, K. Gibble, K. Gibble, K. Gibble, K. Gibble, K. Gibble, M. Abgrall, M. Abgrall, M. Abgrall, M. Abgrall, M. Abgrall, M. Abgrall, M. Abgrall, M. Abgrall, M. Abgrall, M. Abgrall, M. Abgrall, M. Abgrall, M. Abgrall, M. E. Tobar, M. Lours, M. Lours, M. Lours, M. Lours, M. Lours, M. Lours, M. Lours, M. Lours, M. Lours, M. Lours, M. Lours, M. Lours, M. Lours, M.E. Tobar, M.E. Tobar, M.E. Tobar, M.E. Tobar, M.E. Tobar, M.E. Tobar, M.E. Tobar, M.E. Tobar, M.E. Tobar, M.E. Tobar, M.E. Tobar, M.E. Tobar, P. Laurent, P. Laurent, P. Laurent, P. Laurent, P. Laurent, P. Laurent, P. Laurent, P. Laurent, P. Laurent, P. Laurent, P. Laurent, P. Laurent, P. Laurent, P. Rosenbusch, P. Rosenbusch, P. Rosenbusch, P. Rosenbusch, P. Rosenbusch, P. Rosenbusch, P. Rosenbusch, P. Rosenbusch, P. Rosenbusch, P. Rosenbusch, P. Rosenbusch, P. Rosenbusch, P. Rosenbusch, R. Li, R. Li, R. Li, R. Li, R. Li, R. Li, R. Li, R. Li, R. Li, R. Li, R. Li, R. Li, Ruoxin Li, , S. Bize, S. Bize, S. Bize, S. Bize, S. Bize, S. Bize, S. Bize, S. Bize, S. Bize, S. Bize, S. Bize, S. Bize, S. Bize   +168 more
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High-precision Frequency Drift Compensation Study of High-performance Rubidium Atomic Clock

Chinese Journal of Magnetic Resonance
With their high reliability, small size and low power consumption, rubidium atomic clocks are widely used in the fields of navigation, communication, etc. In particular, rubidium atomic clocks for navigation satellites have developed excellent stability.
XU Junqiu, LI Junyao, ZHAO Feng, KANG Songbai, Wang Pengfei, Ming Gang   +5 more
doaj   +1 more source

Design of accelerator failure analysis system prototype based on high precision time data

He jishu, 2022
Background High-performance accelerators have higher requirements for operational reliability and stability. By analyzing the historical data that is routinely saved during accelerator operation, most failures can be judged.
CHENG Sinong, ZHANG Zhao, ZHU Peng, LIU Zhi, WANG Lin, XU Guanglei, ZHANG Yuliang, LEI Ge   +7 more
doaj   +1 more source

Research on Pressure Compensation for the Rubidium Atomic Clock Working in Atmospheric Environment

Chinese Journal of Magnetic Resonance
Vapor cell rubidium atomic clock is widely used in the fields of satellite navigation and communication with advantages including small size, light weight, low power and maintenance cost.
LI Junyao, LI Chengkang, ZHAO Feng, WANG Chen, WANG Fang, KANG Songbai, WANG Pengfei, MEI Ganghua, MING Gang   +8 more
doaj   +1 more source