scholarly journals Double-resonance in alkali vapor cells for high performance and miniature atomic clocks

2012 ◽  
Author(s):  
Thejesh Bandi ◽  
Matthieu Pellaton ◽  
Danijela Miletic ◽  
Christoph Affolderbach ◽  
Florian Gruet ◽  
...  
Keyword(s):  
High Performance ◽  
Double Resonance ◽  
Atomic Clocks ◽  
Vapor Cells

scholarly journals Optical atomic phase reference and timing

2017 ◽  
Vol 375 (2099) ◽  
pp. 20160241 ◽  
Author(s):  
L. Hollberg ◽  
E. H. Cornell ◽  
A. Abdelrahmann
Keyword(s):  
Special Relativity ◽  
Real World ◽  
High Performance ◽  
Cold Atoms ◽  
Cold Atom ◽  
New Physics ◽  
Atomic Clocks ◽  
Commercial World ◽  
Commercial Applications ◽  
Quantum Technology

Atomic clocks based on laser-cooled atoms have made tremendous advances in both accuracy and stability. However, advanced clocks have not found their way into widespread use because there has been little need for such high performance in real-world/commercial applications. The drive in the commercial world favours smaller, lower-power, more robust compact atomic clocks that function well in real-world non-laboratory environments. Although the high-performance atomic frequency references are useful to test Einstein's special relativity more precisely, there are not compelling scientific arguments to expect a breakdown in special relativity. On the other hand, the dynamics of gravity, evidenced by the recent spectacular results in experimental detection of gravity waves by the LIGO Scientific Collaboration, shows dramatically that there is new physics to be seen and understood in space–time science. Those systems require strain measurements at less than or equal to 10 −20 . As we discuss here, cold atom optical frequency references are still many orders of magnitude away from the frequency stability that should be achievable with narrow-linewidth quantum transitions and large numbers of very cold atoms, and they may be able to achieve levels of phase stability, Δ Φ / Φ total  ≤ 10 −20 , that could make an important impact in gravity wave science. This article is part of the themed issue ‘Quantum technology for the 21st century’.

Advanced microfabrication technologies for miniature caesium vapor cells for atomic clocks

2019 ◽  
Author(s):  
Christophe Gorecki ◽  
Nicolas Passilly ◽  
Vincent Maurice ◽  
Sylwester Bargiel ◽  
Ravinder Chutani ◽  
...  
Keyword(s):  
Atomic Clocks ◽  
Vapor Cells

scholarly journals The Microloop-Gap Resonator: A Novel Miniaturized Microwave Cavity for Double-Resonance Rubidium Atomic Clocks

2014 ◽  
Vol 14 (9) ◽  
pp. 3193-3200 ◽  
Author(s):  
Maddalena Violetti ◽  
Matthieu Pellaton ◽  
Christoph Affolderbach ◽  
Francesco Merli ◽  
Jean-Francois Zurcher ◽  
...  
Keyword(s):  
Double Resonance ◽  
Microwave Cavity ◽  
Atomic Clocks

Microfabrication of cesium vapor cells with buffer gas for MEMS atomic clocks

2011 ◽  
Vol 167 (2) ◽  
pp. 594-601 ◽  
Author(s):  
M. Hasegawa ◽  
R.K. Chutani ◽  
C. Gorecki ◽  
R. Boudot ◽  
P. Dziuban ◽  
...  
Keyword(s):  
Atomic Clocks ◽  
Buffer Gas ◽  
Cesium Vapor ◽  
Vapor Cells

Determination of the Geopotential Difference between Atomic Clock Ensemble in Space (ACES) and Ground Station using the Tri-Frequency Combination (TFC) Method

2021 ◽  
Author(s):  
Mostafa Ashry ◽  
Wenbin Shen ◽  
Ziyu Shen ◽  
Hussein A. Abd-Elmotaal ◽  
Abdelrahim ruby ◽  
...  
Keyword(s):  
Natural Science ◽  
Doppler Effect ◽  
High Performance ◽  
Atomic Clock ◽  
Space Station ◽  
Earth Tide ◽  
Relativity Theory ◽  
Atomic Clocks ◽  
Clock Signal ◽  
Ku Band

<p>According to general relativity theory, a precise clock runs at different rates at positions with different geopotentials. Atomic Clock Ensemble in Space (ACES) is a mission using high-performance clocks and links to test fundamental laws of physics in space. The ACES microwave link (MWL) will make the ACES clock signal available to ground laboratories equipped with atomic clocks. The ACES-MWL will allow space-to-ground and ground-to-ground comparisons of atomic frequency standards. This study aims to apply the tri-frequency combination (TFC) method to determine the geopotential difference between the ACES and a first order triangulation station in Egypt. The TFC uses the uplink of carrier frequency 13.475 GHz (Ku band) and downlinks of carrier frequencies 14.70333 GHz (Ku band) and 2248 MHz (S-band) to transfer time and frequency. Here we present a simulation experiment. In this experiment, we use the international space station (ISS) orbit data, ionosphere and troposphere models, regional gravitational potential and geoid for Africa, solid Earth tide model, and simulated clock data by a conventionally accepted stochastic noises model. The scientific object requires stabilities of atomic clocks at least 3 × 10 <sup>−16</sup> /day, so we must consider various effects, including the Doppler effect, second-order Doppler effect, atmospheric frequency shift, tidal effects, refraction caused by the atmosphere, and Shapiro effect, with accuracy levels of decimetres. This study is supported by the National Natural Science Foundations of China (NSFC) under Grants 42030105, 41721003, 41804012, 41631072, 41874023, Space Station Project (2020)228, and the Natural Science Foundation of Hubei Province of China under Grant 2019CFB611.</p>

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