Results 21 to 30 of about 3,059,110 (191)
Frontiers in Physics, 2022 Since 1960, when the first hydrogen frequency standard, the microwave amplification by stimulated emission of radiation (maser), was developed in the laboratory of Norman Ramsey at Harvard University, the performance of its frequency stability and ...
Jiayu Dai +5 more
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Publisher Correction: Chip-scale atomic diffractive optical elements
Nature Communications, 2019 An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Liron Stern +4 more
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A chip-scale atomic beam clock
Nature Communications, 2023 Atomic beams are a longstanding technology for atom-based sensors and clocks with widespread use in commercial frequency standards. Here, we report the demonstration of a chip-scale microwave atomic beam clock using coherent population trapping (CPT ...
Gabriela D. Martinez +5 more
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Chip-scale atomic diffractive optical elements
Nature Communications, 2019 Quantum coherence and the nonlinear properties of atoms are highly useful in optical devices. Here the authors show quantum-optic hybrid platforms in fully integrated chip-scale atomic diffractive optical elements by embedding hot atomic Rb vapor in ...
Liron Stern +4 more
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Chip-Scale Ultra-Low Field Atomic Magnetometer Based on Coherent Population Trapping
Sensors, 2021 We report a chip-scale atomic magnetometer based on coherent population trapping, which can operate near zero magnetic field. By exploiting the asymmetric population among magnetic sublevels in the hyperfine ground state of cesium, we observe that the ...
Hyun-Gue Hong +7 more
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Detecting LISA sources using time-frequency techniques [PDF]
, 2007 The planned Laser Interferometer Space Antenna (LISA) will detect gravitational wave signals from a wide range of sources. However, disentangling individual signals from the source-dominated data stream is a challenging problem and the focus of much ...
Gair, Jonathan R, Jones, Gareth
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Data-driven time–frequency analysis
Applied and Computational Harmonic Analysis, 2013 In this paper, we introduce a new adaptive data analysis method to study trend and instantaneous frequency of nonlinear and non-stationary data. This method is inspired by the Empirical Mode Decomposition method (EMD) and the recently developed compressed (compressive) sensing theory.
Hou, Thomas Y., Shi, Zuoqiang
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A proof-of-concept model of compact and high-performance 87Sr optical lattice clock for space
AIP Advances, 2021 A compact and robust design of an optical lattice clock with high stability and accuracy is needed for the implementation of optical clocks operating on the space station.
Feng Guo +13 more
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Time‐frequency BSS of biosignals [PDF]
Healthcare Technology Letters, 2018 Time–frequency (TF) representations are very important tools to understand and explain circumstances, where the frequency content of non‐stationary signals varies in time. A variety of biosignals such as speech, electrocardiogram (ECG), electroencephalogram (EEG), and electromyogram (EMG) show some form of non‐stationarity.
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Remote Sensing, 2022 Applications of optical clocks in physical geodesy for determining geopotential are of increasing interest to scientists as the accuracy of optical clocks improves and the clock size becomes more and more compact.
Anh The Hoang +4 more
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