Chip-scale atomic clock (CSAC) aided GNSS in urban canyons
Sign Up to like & getrecommendations! Published in 2024 at "GPS Solutions"
DOI: 10.1007/s10291-024-01742-3
Abstract: In urban canyons, the reflections and obstructions of Global Navigation Satellite System (GNSS) signals frequently lead to significant errors in measurements, the number of which can be larger than that of the correct measurements. This… read more here.
Keywords: clock csac; chip scale; scale atomic; clock ... See more keywords
Atomic clock performance enabling geodesy below the centimetre level
Sign Up to like & getrecommendations! Published in 2018 at "Nature"
DOI: 10.1038/s41586-018-0738-2
Abstract: The passage of time is tracked by counting oscillations of a frequency reference, such as Earth’s revolutions or swings of a pendulum. By referencing atomic transitions, frequency (and thus time) can be measured more precisely… read more here.
Keywords: frequency; time; performance; clock performance ... See more keywords
Microcell atomic clock using laser current-actuated power modulation with 10−12 range stability at 1 day
Sign Up to like & getrecommendations! Published in 2025 at "Scientific Reports"
DOI: 10.1038/s41598-025-19732-x
Abstract: We present a coherent-population trapping (CPT) microcell atomic clock using symmetric auto-balanced Ramsey (SABR) spectroscopy. The pulsed SABR sequence is applied through direct current-based power modulation of the vertical-cavity surface-emitting laser, eliminating the need for… read more here.
Keywords: spectroscopy; power; clock using; clock ... See more keywords
Study of additive manufactured microwave cavities for pulsed optically pumped atomic clock applications
Sign Up to like & getrecommendations! Published in 2018 at "Applied Physics Letters"
DOI: 10.1063/1.5019444
Abstract: Additive manufacturing (AM) of passive microwave components is of high interest for the cost-effective and rapid prototyping or manufacture of devices with complex geometries. Here, we present an experimental study on the properties of recently… read more here.
Keywords: study additive; microwave; microwave cavities; additive manufactured ... See more keywords
194 nm microplasma lamps driven by excitation transfer: optical sources for the 199Hg ion atomic clock and photochemistry
Sign Up to like & getrecommendations! Published in 2022 at "Plasma Sources Science and Technology"
DOI: 10.1088/1361-6595/ac5c5c
Abstract: A series of miniature, microcavity plasma lamps emitting predominantly at 194 nm has been successfully developed and tested as the optical pump for the microwave 199Hg-ion atomic clock (40.507 GHz), replacing low pressure, RF-powered Ar/Hg… read more here.
Keywords: 199hg ion; excitation; ion; ion atomic ... See more keywords
Stabilizing Rabi oscillation of a charge qubit via the atomic clock technique
Sign Up to like & getrecommendations! Published in 2018 at "New Journal of Physics"
DOI: 10.1088/1367-2630/aaa643
Abstract: We propose a superconducting circuit-atom hybrid, where the Rabi oscillation of single excess Cooper pair in the island is stabilized via the common atomic-clock technique. The noise in the superconducting circuit is mapped onto the… read more here.
Keywords: charge qubit; clock technique; oscillation; rabi oscillation ... See more keywords
Improving the Q Factor of an Optical Atomic Clock Using Quantum Nondemolition Measurement
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review X"
DOI: 10.1103/physrevx.10.041052
Abstract: Quantum non-demolition (QND) measurement is a remarkable tool for the manipulation of quantum systems. It allows specific information to be extracted while still preserving fragile quantum observables of the system. Here we apply cavity-based QND… read more here.
Keywords: measurement; clock; improving factor; clock using ... See more keywords
ULPAC: A Miniaturized Ultralow-Power Atomic Clock
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Journal of Solid-State Circuits"
DOI: 10.1109/jssc.2019.2941004
Abstract: This article introduces a chip-scale ultralow-power atomic clock (ULPAC) in the microwave frequency region. A new suspended quantum package architecture along with a fully integrated frequency probing and locking loop implemented in CMOS technology results… read more here.
Keywords: ultralow power; atomic clock; frequency; power atomic ... See more keywords
Scalable Design of an Atomic Clock Stabilized and ML-Optimized RF Synthesizer
Sign Up to like & getrecommendations! Published in 2025 at "IEEE Transactions on Instrumentation and Measurement"
DOI: 10.1109/tim.2025.3545529
Abstract: We report a novel design of a digitally controlled oscillator (DCO), its operation, and characteristics, whose performance is boosted with machine learning (ML) implementation. The DCO outputs 10–300 MHz at the stability of rubidium atomic… read more here.
Keywords: design atomic; scalable design; stabilized optimized; atomic clock ... See more keywords
Observation of millihertz-level cooperative Lamb shifts in an optical atomic clock
Sign Up to like & getrecommendations! Published in 2024 at "Science"
DOI: 10.1126/science.adh4477
Abstract: Collective couplings of atomic dipoles to a shared electromagnetic environment produce a wide range of many-body phenomena. We report on the direct observation of resonant electric dipole-dipole interactions in a cubic array of atoms in… read more here.
Keywords: cooperative lamb; optical atomic; clock; lamb shifts ... See more keywords
Electromagnetically induced absorption scheme for vapor-cell atomic clock.
Sign Up to like & getrecommendations! Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.036034
Abstract: A dual-frequency light field scheme, composed of counterpropagating pump and probe light waves with equal circular polarizations and different intensities, is proposed for the detection of subnatural-linewidth electromagnetically induced absorption (EIA) resonances. In this scheme,… read more here.
Keywords: vapor cell; induced absorption; scheme; electromagnetically induced ... See more keywords