Results 71 to 80 of about 100,070 (278)
Optical atomic clock comparison through turbulent air
Physical Review Research, 2020 We use frequency-comb-based optical two-way time-frequency transfer (O-TWTFT) to measure the optical frequency ratio of state-of-the-art ytterbium and strontium optical atomic clocks separated by a 1.5-km open-air link.
Martha I. Bodine +34 more
doaj +1 more source
Mapping Out Atom-Wall Interaction with Atomic Clocks [PDF]
Physical Review Letters, 2009 We explore a feasibility of measuring atom-wall interaction using atomic clocks based on atoms trapped in engineered optical lattices. Optical lattice is normal to the wall. By monitoring the wall-induced clock shift at individual wells of the lattice, one would measure a dependence of the atom-wall interaction on the atom-wall separation.
Derevianko, A. +2 more
openaire +3 more sources
The role of histone modifications in transcription regulation upon DNA damage
FEBS Letters, EarlyView.This review discusses the critical role of histone modifications in regulating gene expression during the DNA damage response (DDR). By modulating chromatin structure and recruiting repair factors, these post‐translational modifications fine‐tune transcriptional programmes to maintain genomic stability.
Angelina Job Kolady, Siyao Wang
wiley +1 more source
Improving the Q Factor of an Optical Atomic Clock Using Quantum Nondemolition Measurement
Physical Review X, 2020 Quantum nondemolition (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.
William Bowden +4 more
doaj +1 more source
Integration of circadian and hypoxia signaling via non‐canonical heterodimerization
FEBS Letters, EarlyView.CLOCK, BMAL1, and HIFs are basic helix‐loop‐helix and Per‐Arnt‐Sim domain (bHLH‐PAS) proteins, which function as transcription factors. bHLH‐PAS proteins are designated in two classes. Many class I proteins are regulated by environmental signals via their PAS domains, but such signals have not been identified for all.
Sicong Wang, Katja A. Lamia
wiley +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 +3 more
doaj +1 more source
Subpicosecond $X$ rotations of atomic clock states
, 2018 We demonstrate subpicosecond-time-scale population transfer between the pair of hyperfine ground states of atomic rubidium using a single laser-pulse. Our scheme utilizes the geometric and dynamic phases induced during Rabi oscillation through the fine ...
Ahn, Jaewook +4 more
core +1 more source
La Rivista del Nuovo Cimento, 2013 69 pages, 30 figures, 7 ...
POLI, NICOLA +3 more
openaire +3 more sources
FEBS Letters, EarlyView.Multidrug transporters BpeB and BpeF from the Gram‐negative pathogen Burkholderia pseudomallei have a hydrophilic patch in their substrate‐binding pocket. Drug susceptibility tests and growth curve analyses using an Escherichia coli recombinant expression system revealed that the hydrophilic patches of BpeB and BpeF are involved in the substrate ...
Ui Okada, Satoshi Murakami
wiley +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 +5 more
core +2 more sources