Results 71 to 80 of about 37,255 (283)
P-step Kalman-like unbiased FIR algorithm for detecting anomalies of atomic clocks
Measurement + Control, 2023 An extended measurement model anomaly detection algorithm for atomic clocks is proposed based on the p-step Kalman-like iterative Unbiased finite impulse response (UFIR) algorithm. The novel of the proposed algorithm is that it breaks the disadvantage of
Ran Yan +3 more
doaj +1 more source
Stability of Atomic Clocks Based on Entangled Atoms [PDF]
Physical Review Letters, 2004 We analyze the effect of realistic noise sources for an atomic clock consisting of a local oscillator that is actively locked to a spin-squeezed (entangled) ensemble of $N$ atoms. We show that the use of entangled states can lead to an improvement of the long-term stability of the clock when the measurement is limited by decoherence associated with ...
Andre, A., Sorensen, A. S., Lukin, M. D.
openaire +3 more sources
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
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
Geodesy and Geodynamics, 2020 General relativity theory (GRT) concludes that a precise clock ticks at different running rates if it is under the influence of different geopotentials.
Kuangchao Wu +5 more
doaj +1 more source
La Rivista del Nuovo Cimento, 2013 69 pages, 30 figures, 7 ...
POLI, NICOLA +3 more
openaire +3 more sources
Atomic clocks with suppressed blackbody radiation shift
, 2011 We develop a nonstandard concept of atomic clocks where the blackbody radiation shift (BBRS) and its temperature fluctuations can be dramatically suppressed (by one to three orders of magnitude) independent of the environmental temperature.
A. V. Taichenachev +9 more
core +1 more source
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
Journal of Research of the National Bureau of Standards, 1983 The history of atomic and molecular standards of time and frequency is traced from the earliest work on molecular and atomic beam resonance techniques to more recent developments that promise improved standards in the future. The various devices currently used as standards are discussed in detail from an historical prospective.
openaire +2 more sources
Scattering of Cold Atom Coherences by Hot Atoms: Frequency Shifts from Background Gas Collisions
, 2013 Frequency shifts from background gas collisions currently contribute significantly to the inaccuracy of atomic clocks. Because nearly all collisions with room-temperature background gases that transfer momentum eject the cold atoms from the clock, the ...
Gibble, Kurt
core +1 more source