143,474 research outputs found
Weak Interaction Contributions in Light Muonic Atoms
Weak interaction contributions to hyperfine splitting and Lamb shift in light
electronic and muonic atoms are calculated. We notice that correction to
hyperfine splitting turns into zero for deuterium. Weak correction to the Lamb
shift in hydrogen is additionally suppressed in comparison with other cases by
a small factor .Comment: Minor editorial corrections, reference added, version to be published
in Phys. Rev.
T-entropy and Variational principle for the spectral radius of weighted shift operators
In this paper we introduce a new functional invariant of discrete time
dynamical systems -- the so-called t-entropy. The main result is that this
t-entropy is the Legendre dual functional to the logarithm of the spectral
radius of the weighted shift operator on generated by the dynamical
system. This result is called the Variational principle and is similar to the
classical variational principle for the topological pressure.Comment: 12 pages, v.2: editorial correction
The impact of poor asthma control among asthma patients treated with inhaled corticosteroids plus long-acting β2-agonists in the United Kingdom : a cross-sectional analysis
This study was sponsored by Boehringer Ingelheim Ltd UK, which was involved in all stages of the study conduct and analysis and also funded all costs associated with the development of the manuscript. The authors acknowledge Kantar Health and Errol J Philip for providing medical writing support. Editorial assistance and medical writing support was also provided by Michelle Rebello, PhD, and Suchita Nath-Sain, PhD, of Cactus Communications. This study was sponsored by Boehringer Ingelheim Ltd., UK, which also funded all costs associated with the development of the manuscript. Author Correction, npj Primary Care Respiratory Medicine 27, Article number: 65 (2017) doi:10.1038/s41533-017-0063-5, 05 December 2017 Correction to:npj Primary Care Respiratory Medicine (2017); doi:10.1038/s41533-017-0014-1; Published 09 March 2017Peer reviewedPublisher PD
The Modern FPGA as Discriminator, TDC and ADC
Recent generations of Field Programmable Gate Arrays (FPGAs) have become
indispensible tools for complex state machine control and signal processing,
and now routinely incorporate CPU cores to allow execution of user software
code. At the same time, their exceptional performance permits low-power
implementation of functionality previously the exclusive domain of dedicated
analog electronics. Specific examples presented here use FPGAs as
discriminator, time-to-digital (TDC) and analog-to-digital converter (ADC). All
three cases are examples of instrumentation for current or future astroparticle
experiments.Comment: 7 pages, v3 minor JINST editorial correction
HFLAV branching fractions fit and measurements of Vus with lepton data
We report the status of the Heavy Flavour Averaging Group (HFLAV) averages of
the lepton measurements We then update the latest published HFLAV global
fit of the lepton branching fractions (Spring 2017) with recent results
by BABAR. We use the fit results to update the Cabibbo-Kobayashi-Maskawa (CKM)
matrix element Vus measurements with the branching fractions. We combine
the direct branching fraction measurements with indirect predictions
using kaon branching fractions measurements to improve the determination of Vus
using branching fractions. The Vus determinations based on the inclusive
branching fraction of to strange final states are about lower
than the Vus determination from the CKM matrix unitarity.Comment: Proceedings of the 15th International Workshop on Tau Lepton Physics
(Tau 2018). SciPost editorial revisions applied. Fixed radiative correction
that was erroneously including an isospin-breaking correction, fixed one
formula, corrected a few typo
Comment on "Mechanical analog of temperature for the description of force distribution in static granular packings"
It has been proposed by Ngan [Phys. Rev. E 68, 011301 (2003)] that the
granular contact force distribution may be analytically derived by minimizing
the analog of a thermodynamic free energy, in this case consisting of the total
potential energy stored in the compressed contacts minus a particular form of
entropy weighted by a parameter. The parameter is identified as a mechanical
temperature. I argue that the particular form of entropy cannot be correct and
as a result the proposed method produces increasingly errant results for
increasing grain rigidity. This trend is evidenced in Ngan's published results
and in other numerical simulations and experiments.Comment: 4 pages, 1 figure, minor editorial correction
Escorpiones del estado de Ceará, Brasil: distribución y comentarios ecológicos - Fe de errata
An error in Figure 2 of the work: Braga JRM, Ramalho RD, Sousa JCC de, Almeida IL de. 2022. Scorpions from Ceará State, Brazil: Distribution and ecological comments. Revista Peruana de Biología. 29(1):e21205–e21205. https://doi.org/10.15381/rpb.v29i1.21205Due to an editorial mistake, the latest authors version of figure 2 was not considered. The correction refers to the image of Tityus serrulatus Lutz & Mello, 1922. Image: Relrison Dias.The article files that indicate in the dates of the editorial process: “Correction [Fig 2]: 05/10/2022”, already include the changeUn error en la Figura 2 del trabajo: Braga JRM, Ramalho RD, Sousa JCC de, Almeida IL de. 2022. Scorpions from Ceará State, Brazil: Distribution and ecological comments. Revista Peruana de Biología. 29(1):e21205–e21205. https://doi.org/10.15381/rpb.v29i1.21205Por error editorial no se consideró la última versión de la figura 2 que los autores enviaron. El cambio se refiere a la imagen de Tityus serrulatus Lutz & Mello, 1922. Image: Relrison Dias.Los archivos del articulo que indican en las fechas del proceso editorial: “Corrección [Fig 2]: 10/05/2022”, ya incluyen el cambio
Focus on Quantum Memories
Quantum memories are essential for quantum information processing and
long-distance quantum communication. The field has recently seen a lot of
progress, and the present focus issue offers a glimpse of these developments,
showing both experimental and theoretical results from many of the leading
groups around the world. On the experimental side, it shows work on cold gases,
warm vapors, rare-earth ion doped crystals and single atoms. On the theoretical
side there are in-depth studies of existing memory protocols, proposals for new
protocols including approaches based on quantum error correction, and proposals
for new applications of quantum storage. Looking forward, we anticipate many
more exciting results in this area.Comment: 4 pages, no figures; editorial for NJP focus issue on quantum
memorie
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