Results 31 to 40 of about 22,663 (294)

Colloquium: Physics of optical lattice clocks

, 2010
Recently invented and demonstrated, optical lattice clocks hold great promise for improving the precision of modern timekeeping. These clocks aim at the 10^-18 fractional accuracy, which translates into a clock that would neither lose or gain a fraction ...
Andrei Derevianko, Hidetoshi Katori, Katori, H., Nielsen, M. A., Usher, A. P., Varshalovich, D. A.   +5 more
core   +1 more source

The development of active optical clock

AAPPS Bulletin, 2023
The atomic clocks, whether operating at optical or microwave region, can be divided into two categories according to their working mode, namely the passive clocks and active clocks.
Jia Zhang, Tiantian Shi, Jianxiang Miao, Jingbiao Chen   +3 more
doaj   +1 more source

Non-destructive measurement of the transition probability in a Sr optical lattice clock

, 2009
We present the experimental demonstration of non-destructive probing of the 1S0-3P0 clock transition probability in an optical lattice clock with 87Sr atoms. It is based on the phase shift induced by the atoms on a weak off-resonant laser beam.
F.-L. Hong, Jérôme Lodewyck, Philip G. Westergaard, Pierre Lemonde, U. Leonhardt, X. Baillard   +5 more
core   +2 more sources

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, Das, Manoj, Katori, Hidetoshi, Nemitz, Nils, Ohkubo, Takuya, Ohmae, Noriaki, Takamoto, Masao, Takano, Tetsushi, Ushijima, Ichiro, Yamaguchi, Atsushi, Yamanaka, Kazuhiro   +10 more
core   +2 more sources

GAD65 Antibody ELISA With Extended Reportable Range: Validation and Guidance for Neurological Practice

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To (1) validate GAD65‐ELISA detection and quantification for type 1 diabetes mellitus and autoimmune neurological diagnoses, (2) correlate ELISA results (reference range < 5 IU/mL) with established radioimmunoprecipitation assay (RIA; ≤ 0.02 nmol/L), and (3) define ELISA clinical utility and pitfalls.
Andrew McKeon, Dana Olofson, Diana Anissian, Divyanshu Dubey, Eoin P. Flanagan, Max C. Herman, Sarosh R. Irani, Daniel H. Lachance, Maria A. Willrich, Sean Pittock, John R. Mills, Anastasia Zekeridou   +11 more
wiley   +1 more source

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Enhancing Optical Lattice Clock Coherence Times with Erasure Conversion

PRX Quantum
Increasing coherent interrogation times is central to advancing the precision of optical clocks. Synchronous differential optical clock comparisons have now demonstrated atomic coherence times that far exceed the coherence time of the clock laser.
Shuo Ma, Jonathan Dolde, Xin Zheng, Dhruva Ganapathy, Alexander Shtov, Jenny Chen, Anke Stöltzel, Bennett J. Christensen, Shimon Kolkowitz   +8 more
doaj   +1 more source

Experimental Observation of the Suppression of the Dephasing in a Floquet Engineering Optical Lattice Clock

Applied Sciences, 2022
Accurately manipulating quantum states is a fundamental strategy for improving the performance of quantum metrology, computing, and simulation. However, the quantum state is susceptible to dephasing due to the temperature and density of the atomic ...
Feng Guo, Xiaotong Lu, Chihua Zhou, Hong Chang   +3 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, AD Ludlow, AD Ludlow, B Young, C. W. Oates, CW Chou, CW Chou, G Santarelli, H Katori, J Millo, J Ye, J. A. Sherman, K Numata, L.-S. Ma, LS Ma, M Notcutt, MD Swallows, MM Boyd, N Nakagawa, N. D. Lemke, ND Lemke, PG Westergaard, R. W. Fox, RW Fox, S Bize, S Webster, SA Webster, ST Dawkins, T Legero, T Udem, WM Itano, Y Levin, Y. Y. Jiang   +32 more
core   +1 more source

Harnessing Fungal Biowelding for Constructing Mycelium‐Engineered Materials

Advanced Engineering Materials, EarlyView.
Mycelium‐bound composites (MBCs) offer low‐carbon alternatives for construction, yet interfacial bonding remains a critical challenge. This review examines fungal biowelding as a biocompatible adhesive, elucidating mycelium‐mediated interfacial mechanisms and their role in material assembly. Strategies to optimize biowelding are discussed, highlighting
Xue Brenda Bai, Xinrui Sarah Niu, Zhao Qin   +2 more
wiley   +1 more source