Results 21 to 30 of about 3,181,689 (295)

High-Frequency Measurements [PDF]

Physics Today, 1952
Third Conference Next ...
openaire   +2 more sources

Ramsey interferometry with cold atoms in coherent population trapping

Advances in Physics: X
The utilization of Ramsey interferometry via coherent population trapping (CPT), which enables the optical interrogation of microwave transitions without the reliance on microwave cavities, plays a crucial role in the advancement of compact and low-power
Chengyin Han, Bo Lu, Chaohong Lee
doaj   +1 more source

Density–Density Correlation Spectra of Ultracold Bosonic Gas Released from a Deep 1D Optical Lattice

Entropy
Density–density correlation analysis is a convenient diagnostic tool to reveal the hidden order in the strongly correlated phases of ultracold atoms. We report on a study of the density–density correlations of ultracold bosonic atoms which were initially
Yunzhi Tan, Qiang Zhu, Bing Wang, Jingran Shi, Dezhi Xiong, Baolong Lyu   +5 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

Precision packet-based frequency transfer based on oversampling [PDF]

, 2017
Frequency synchronization of a distributed measurement system requires the transfer of an accurate frequency reference to all nodes. The use of a general-purpose packet-based network for this aim is analyzed in this paper, where oversampling is ...
Giorgi, Giada, Narduzzi, Claudio
core   +1 more source

Quantum lock-in measurement of weak alternating signals

Quantum Frontiers
The detection of weak time-dependent alternating signals in a strongly noisy background is an important problem in physics and a critical task in metrology. Quantum lock-in amplifier can extract alternating signals within extreme noises by using suitable
Min Zhuang, Sijie Chen, Jiahao Huang, Chaohong Lee   +3 more
doaj   +1 more source

Simulation of an Adaptive Method of Improving the Accuracy and Extending the Range of Frequency Signal Processing in a Frequency-to-Code Converter

Applied Sciences, 2021
The article discusses the modification of one of the basic methods of converting successive periods of a variable frequency signal into numerical values representing them.
Piotr Warda
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source

Calculation and Analysis of Helium-permeation-induced Frequency Drift of the Rubidium Atomic Clock

Chinese Journal of Magnetic Resonance
Due to the collision-shift effect, helium permeation into the vapor cell causes a time-dependent frequency drift in rubidium atomic clock. To quantify this shift, a cylindrical vapor cell with dimensions of 1.8 cm in diameter, 1.6 cm in height, and 1 mm ...
LI Dou, WANG Pengfei, ZHONG Da, MEI Ganghua, Kang Songbai   +4 more
doaj   +1 more source

Underwater passive manoeuvring target tracking with isogradient sound speed profile

IET Radar, Sonar & Navigation, 2022
Compared with the traditional tracking problem, the underwater 3‐D passive manoeuvring target tracking faces the following challenging problems: (1) Since the signal propagation delay is varying and unknown, the relationship between the two adjacent ...
Jun Su, Yaan Li, Wasiq Ali
doaj   +1 more source