Results 31 to 40 of about 100,070 (278)
Frontiers in Physics, 2022 The research of optically pumped cesium beam atomic clock (OPCB) at Peking University has lasted for decades. At present, the short-term frequency stability is 3×10−12/τ and the long-term (5-day) frequency stability can reach 7 × 10−15.
Xuan He +6 more
doaj +1 more source
A low phase noise microwave source for high‐performance CPT Rb atomic clock
Electronics Letters, 2021 Phase noise of the frequency synthesizer is one of the main limitations to the short‐term stability of microwave atomic clocks. Here, a low‐noise, simple‐architecture microwave frequency synthesizer for a coherent population trapping (CPT) clock is ...
Xiaodong Li +10 more
doaj +1 more source
Active optical clock based on four-level quantum system [PDF]
, 2012 Active optical clock, a new conception of atomic clock, has been proposed recently. In this report, we propose a scheme of active optical clock based on four-level quantum system.
A C Ji +26 more
core +2 more sources
Atomic fountains and optical clocks at SYRTE: status and perspectives [PDF]
, 2015 In this article, we report on the work done with the LNE-SYRTE atomic clock ensemble during the last 10 years. We cover progress made in atomic fountains and in their application to timekeeping.
Abgrall, M. +11 more
core +3 more sources
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 +3 more
doaj +1 more source
Feasibility of the optical fiber clock [PDF]
, 2017 We explore the feasibility of a compact high-precision Hg atomic clock based on a hollow core optical fiber. We evaluate the sensitivity of the $^1S_0$-$^3P_0$ clock transition in Hg and other divalent atoms to the fiber inner core surface at non-zero ...
Babb, James F. +2 more
core +3 more sources
A lab-based test of the gravitational redshift with a miniature clock network
Nature Communications, 2023 Einstein’s theory of general relativity predicts that a clock at a higher gravitational potential will tick faster than an otherwise identical clock at a lower potential, an effect known as the gravitational redshift.
Xin Zheng +4 more
doaj +1 more source
Making optical atomic clocks more stable with $10^{-16}$ level laser stabilization
, 2011 The superb precision of an atomic clock is derived from its stability. Atomic clocks based on optical (rather than microwave) frequencies are attractive because of their potential for high stability, which scales with operational frequency. Nevertheless,
A. D. Ludlow +32 more
core +1 more source
Space-Time Reference with an Optical Link
, 2015 We describe a method for realizing a high-performance Space-Time Reference (STR) using a stable atomic clock in a precisely defined orbit and synchronizing the orbiting clock to high-accuracy atomic clocks on the ground.
Berceau, Paul +3 more
core +1 more source
A Quantum Scattering Interferometer [PDF]
, 2007 The collision of two ultra-cold atoms results in a quantum-mechanical superposition of two outcomes: each atom continues without scattering and each atom scatters as a spherically outgoing wave with an s-wave phase shift.
A Widera +31 more
core +2 more sources