Results 31 to 40 of about 8,346 (279)
Frequency ratios of Sr, Yb and Hg based optical lattice clocks and their applications [PDF]
, 2015 This article describes the recent progress of optical lattice clocks with neutral strontium ($^{87}$Sr), ytterbium ($^{171}$Yb) and mercury ($^{199}$Hg) atoms.
Akatsuka, Tomoya +10 more
core +2 more sources
Collisional shifts in optical-lattice atom clocks [PDF]
, 2006 We theoretically study the effects of elastic collisions on the determination of frequency standards via Ramsey fringe spectroscopy in optical-lattice atom clocks. Interparticle interactions of bosonic atoms in multiply-occupied lattice sites can cause a
A. Bauch +11 more
core +2 more sources
Subrecoil Clock-Transition Laser Cooling Enabling Shallow Optical Lattice Clocks
Physical Review Letters, 2022 Laser cooling is a key ingredient for quantum control of atomic systems in a variety of settings. In divalent atoms, two-stage Doppler cooling is typically used to bring atoms to the uK regime. Here, we implement a pulsed radial cooling scheme using the ultranarrow 1S0-3P0 clock transition in ytterbium to realize sub-recoil temperatures, down to tens ...
X. Zhang +7 more
openaire +3 more sources
New frequency ratios with a PHz-scale atomic clock
New Journal of Physics, 2016 Atomic clocks are a tour de force when it comes to rigorous tests of measurement. The ultimate validation of one’s careful assessments is to find agreement on a given parameter with a completely independent laboratory.
J J McFerran
doaj +1 more source
Experimental determination of the E2-M1 polarizability of the strontium clock transition
Physical Review Research, 2023 To operate an optical lattice clock at a fractional uncertainty below 10^{−17}, one must typically consider not only electric-dipole (E1) interaction between an atom and the lattice light field when characterizing the resulting lattice light shift of the
S. Dörscher +3 more
doaj +1 more source
Strontium optical lattice clock
Acta Physica Sinica, 2018 The strontium optical lattice clock has experienced a rapid development since the beginning of the 21st century. Its relative frequency uncertainty, on the order of 10-18, has surpassed that of the cesium fountain clock, the current primary standard for time and frequency.
null Lin Yi-Ge, null Fang Zhan-Jun
openaire +1 more source
An Atomic-Array Optical Clock with Single-Atom Readout
Physical Review X, 2019 Currently, the most accurate and stable clocks use optical interrogation of either a single ion or an ensemble of neutral atoms confined in an optical lattice.
Ivaylo S. Madjarov +7 more
doaj +1 more source
Microscale whispering-gallery-mode light sources with lattice-confined atoms
Scientific Reports, 2021 Microlasers, relying on the strong coupling between active particles and optical microcavity, exhibit fundamental differences from conventional lasers, such as multi-threshold/thresholdless behavior and nonclassical photon emission.
Deshui Yu, Frank Vollmer
doaj +1 more source
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
A strontium lattice clock with inaccuracy and its frequency
New Journal of Physics, 2014 We have measured the absolute frequency of the optical lattice clock based on ^87 Sr at PTB with an uncertainty of $3.9\times {{10}^{-16}}$ using two caesium fountain clocks.
Stephan Falke +12 more
doaj +1 more source