Results 21 to 30 of about 16,536 (302)

Characteristics of the space-borne rubidium atomic clocks for the BeiDou III navigation satellite system

Scientia Sinica Physica Mechanica & Astronomica, 2020
In this paper, we describe the characteristics and performance of space-borne rubidium atomic clocks for the BeiDou III navigation satellite system. The frequency stability of a rubidium atomic clock depends mainly on the signal-to-noise ratio (SNR) of ...
Shidong Yan, Hanhua Wu, Songbai Kang, G. Mei, Wang Chen, D. Zhong, Feng Zhao, L. Wang, Ming Gang, F. Qi, Lin Hou, Qin Wang, Zijing Qiu, Pengfei Wang, W. Fang, Shaofeng An   +15 more
semanticscholar   +1 more source

Observing Spin-Squeezed States under Spin-Exchange Collisions for a Second

PRX Quantum, 2023
Using the platform of a trapped-atom clock on a chip, we observe the time evolution of spin-squeezed hyperfine clock states in ultracold rubidium atoms on previously inaccessible time scales up to 1 s.
Meng-Zi Huang, Jose Alberto de la Paz, Tommaso Mazzoni, Konstantin Ott, Peter Rosenbusch, Alice Sinatra, Carlos L. Garrido Alzar, Jakob Reichel   +7 more
doaj   +1 more source

Improving the start-up characteristics of the rubidium atomic clock

AIP Advances, 2022
Considering the importance of start-up characteristics of the rubidium atomic clock in engineering applications, the objective of this paper is to optimize the start-up characteristics of the rubidium atomic clock by studying the theory of the rubidium atomic frequency standards, especially the light pumping process, and the effect of light intensity ...
Yonggang Guo, Lili Zhu, Shiwei Wang, Jun Zhang, Fucheng Shi, Jinhai Zhang, Jianxiang Wang, Wenxin Li, Zhidong Liu   +8 more
openaire   +2 more sources

Low-Threshold 795 nm Oxide-Confined Distributed Feedback Lasers With Surface Gratings

IEEE Photonics Journal, 2023
795 nm oxide-confined distributed feedback (DFB) lasers have been developed. The oxide-confined structure is used to realize lateral optical and current confinement, and the first-order surface gratings offer the frequency selectivity for single ...
Pingping Qiu, Hengjie Zhou, Tongxin Wang, Qiuhua Wang, Qiang Kan   +4 more
doaj   +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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Investigation of microwave transitions and nonlinear magneto-optical rotation in anti-relaxation-coated cells [PDF]

, 2004
Using laser optical pumping, widths and frequency shifts are determined for microwave transitions between ground-state hyperfine components of $^{85}$Rb and $^{87}$Rb atoms contained in vapor cells with alkane anti-relaxation coatings.
C. Rahman, D. Budker, D. F. Kimball, E. B. Aleksandrov, F. Grossetete, H. G. Robinson, H. Robinson, J. Kitching, J. Vanier, L. Hollberg, M. Tetu, S. Pustelny, T. Hirata, V. V. Yashchuk   +13 more
core   +3 more sources

Mitigating Software Integrity Attacks With Trusted Computing in a Time Distribution Network

IEEE Access, 2023
Time Distribution Networks (TDNs) evolve as new technologies occur to ensure more accurate, reliable, and secure timing information. These networks typically exploit several distributed time servers, organized in a master-slave architecture, that ...
Diana Gratiela Berbecaru, Silvia Sisinni, Antonio Lioy, Benoit Rat, Davide Margaria, Andrea Vesco   +5 more
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

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

Coherent manipulation of atomic qubits in optical micropotentials [PDF]

, 2007
We experimentally demonstrate the coherent manipulation of atomic states in far-detuned dipole traps and registers of dipole traps based on two-dimensional arrays of microlenses.
A. Kaplan, A. Lengwenus, C. Klempt, E.L. Hahn, F. Bloch, F.B.J. Buchkremer, G. Birkl, G. Birkl, G. Grynberg, H. Katori, I. Deutsch, J. Kruse, M. Volk, M.A. Nielsen, M.F. Andersen, N. Davidson, N. Schlosser, N.A. Kurnit, N.F. Ramsey, P. Treutlein, P.S. Jessen, R. Dumke, R. Ozeri, S. Kuhr, W. Ertmer   +24 more
core   +2 more sources