Results 21 to 30 of about 722 (280)

Multi-parameter microwave quantum sensing with a single atomic probe [PDF]

Scientific Reports
We demonstrate a multi-parameter sensing scheme for free space microwave electric and magnetic fields in single vapor cell based on the atom-based microwave detection techniques.
Zhigang Feng, Xiaochi Liu, Zhenfei Song, Jifeng Qu   +3 more
doaj   +2 more sources

Frequency Instability Impact of Low-Cost SDRs on Doppler-Based Localization Accuracy [PDF]

Sensors
In this paper, we explore several widely available software-defined radio (SDR) platforms that could be used for locating with the signal Doppler frequency (SDF) method.
Kacper Bednarz, Jarosław Wojtuń, Jan M. Kelner, Krzysztof Różyc   +3 more
doaj   +2 more sources

The effect of the magnetic field on the shielding efficiency in a rubidium atomic clock

St. Petersburg Polytechnical University Journal: Physics and Mathematics
The paper presents the experimental study results of the dependence of the longitudinal shielding coefficient of a magnetic shield (in the direction of the shield axis) on the strengths and mutual orientation of the operational internal and additional ...
Ermak Sergey, Semenov Vladimir, Sergeeva Maria   +2 more
doaj   +2 more sources

Investigation of an Ultra High Signal-to-noise Ratio Physics Package for the Rubidium Atomic Clock

Chinese Journal of Magnetic Resonance, 2023
Driven by the demand for satellite navigation and deep space exploration, the performance of lamp-pumped rubidium atomic clock has been greatly improved, and its short-term frequency stability has reached the level of a small coefficient of 10-13τ -1/2 ...
CUI Jiaqi, LIU Kangqi, LI Junyao, WANG Fang, MING Gang, ZHAO Feng, MEI Ganghua, ZHONG Da   +7 more
doaj   +1 more source

Analysis of BDS-3 Real-Time Satellite Clock Offset Estimated in Global and Asia-Pacific and the Corresponding PPP Performances

Remote Sensing, 2022
The quality of satellite clock offset affects the performances of positioning, navigation and timing services, and thus it is essential to the Global Navigation Satellite System (GNSS).
Hu Wang, Pengyuan Li, Jiexian Wang, Hongyang Ma, Yangfei Hou, Yingying Ren   +5 more
doaj   +1 more source

Evaluation of BDS-2 and BDS-3 Satellite Atomic Clock Products and Their Effects on Positioning

Remote Sensing, 2021
The BeiDou Navigation Satellite System (BDS) has completed third phase construction and currently provides global services, with a mixed constellation of BDS-2 and BDS-3. The newly launched BDS-3 satellites are equipped with rubidium and passive hydrogen
Shengfeng Gu, Feiyu Mao, Xiaopeng Gong, Yidong Lou, Xueyong Xu, Ye Zhou   +5 more
doaj   +1 more source

Analysis of the Long-Term Characteristics of BDS On-Orbit Satellite Atomic Clock: Since BDS-3 Was Officially Commissioned

Remote Sensing, 2022
Satellite atomic clocks are the key elements for position, navigation, and timing services of the Global navigation satellite system (GNSS); it is necessary to research the characteristics of BDS-3 on-orbit satellite atomic clocks for their further ...
Yifeng Liang, Jiangning Xu, Miao Wu, Fangneng Li   +3 more
doaj   +1 more source

A Scheme for Generating Discontinuous Microwave Inquiry Signal in Rubidium Atomic Frequency Standard

Chinese Journal of Magnetic Resonance, 2020
The microwave probing signal of the rubidium atomic frequency standard (RAFS) is used to excite the transitions between the ground-state energy levels of rubidium atoms, and realize resonance detection.
BAO Wan-jing, ZENG Qing-qi, YU Fang, QIN Lei, CHEN Zhi-yong   +4 more
doaj   +1 more source

High resolution field imaging with atomic vapor cells [PDF]

, 2015
In this thesis, I report on the development of imaging techniques in atomic vapor cells. This is a relatively unexplored area, despite the ubiquitous use of imaging in experiments with ultracold atoms.
Horsley, Andrew
core   +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