CERN Accelerating science

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2016-02-12
08:44
Superconducting nanowire single photon detector at 532 nm and demonstration in satellite laser ranging / Li, Hao ; Chen, Sijing ; You, Lixing ; Meng, Wengdong ; Wu, Zhibo ; Zhang, Zhongping ; Tang, Kai ; Zhang, Lu ; Zhang, Weijun ; Yang, Xiaoyan et al.
Superconducting nanowire single-photon detectors (SNSPDs) at a wavelength of 532 nm were designed and fabricated aiming to satellite laser ranging (SLR) applications. The NbN SNSPDs were fabricated on one-dimensional photonic crystals with a sensitive-area diameter of 42 um. [...]
arXiv:1602.03816.- 2016 - Published in : Optics Express 24(4): 3535-3542. (2016) External link: Preprint

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2016-02-12
08:44
Consistent interpretation of molecular simulation kinetics using Markov state models biased with external information / Rudzinski, Joseph F ; Kremer, Kurt ; Bereau, Tristan
Molecular simulations can provide microscopic insight into the physical and chemical driving forces of complex molecular processes. Despite continued advancement of simulation methodology, model errors may lead to inconsistencies between simulated and reference (e.g., from experiments or higher-level simulations) observables. [...]
arXiv:1602.03809.- 2016 - Published in : J. Chem. Phys. 144 (2016) 051102 External link: Preprint

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2016-02-12
08:44
Anomalous wave as a result of the collision of two wave groups on sea surface / Ruban, V P
The numerical simulation of the nonlinear dynamics of the sea surface has shown that the collision of two groups of relatively low waves with close but noncollinear wave vectors (two or three waves in each group with a steepness of about 0.2) can result in the appearance of an individual anomalous wave whose height is noticeably larger than that in the linear theory. Since such collisions quite often occur on the ocean surface, this scenario of the formation of rogue waves is apparently most typical under natural conditions..
arXiv:1602.03753.- 2016 - 5 p. - Published in : JETP Letters (2015) V.102, No.10, p.650 External link: Preprint

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2016-02-12
08:44
Qualities and Inequalities in Online Social Networks through the Lens of the Generalized Friendship Paradox / Momeni, Naghmeh ; Rabbat, Michael
The friendship paradox is the phenomenon that in social networks, people on average have fewer friends than their friends do. The generalized friendship paradox is an extension to attributes other than the number of friends. [...]
arXiv:1602.03739.- 2016 - Published in : PLoS ONE 11(2): e0143633 (2016) External link: Preprint

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2016-02-12
08:44
Bleb Nucleation through Membrane Peeling / Alert, Ricard ; Casademunt, Jaume
We study the nucleation of blebs, i.e., protrusions arising from a local detachment of the membrane from the cortex of a cell. Based on a simple model of elastic linkers with force-dependent kinetics, we show that bleb nucleation is governed by membrane peeling. [...]
arXiv:1602.03646.- 2016 - Published in : Phys. Rev. Lett. 116 (2016) 068101 External link: Preprint

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2016-02-12
08:44
Nonlinear internal wave penetration via parametric subharmonic instability / Ghaemsaidi, S J ; Joubaud, S ; Dauxois, T ; Odier, P ; Peacock, T
We present the results of a laboratory experimental study of an internal wave field generated by harmonic, spatially-periodic boundary forcing from above of a density stratification comprising a strongly-stratified, thin upper layer sitting atop a weakly-stratified, deep lower layer. In linear regimes, the energy flux associated with relatively high frequency internal waves excited in the upper layer is prevented from entering the lower layer by virtue of evanescent decay of the wave field. [...]
arXiv:1602.03605.- 2016 - 6 p. - Published in : Physics of Fluids, 28(1): 011703 (2016) External link: Preprint

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2016-02-12
08:41
Chameleonic Theories: A Short Review / Zanzi, Andrea
In the chameleon mechanism, a field (typically scalar) has a mass that depends on the matter density of the environment: the larger is the matter density, the larger is the mass of the chameleon. We briefly review some aspects of chameleonic theories. [...]
arXiv:1602.03869.- 2016 - 30 p. - Published in : Universe 1 (2015) 446-475 External link: Preprint

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2016-02-12
08:39
Astrophysical Implications of the Binary Black-Hole Merger GW150914 / , /LIGO Scientific Collaboration ; Virgo Collaboration
The discovery of the gravitational-wave source GW150914 with the Advanced LIGO detectors provides the first observational evidence for the existence of binary black-hole systems that inspiral and merge within the age of the Universe. Such black-hole mergers have been predicted in two main types of formation models, involving isolated binaries in galactic fields or dynamical interactions in young and old dense stellar environments. [...]
arXiv:1602.03846; LIGO-P1500262.- 2016 - 17 p. - Published in : Astrophys. J. 818 (2016) L22 External link: Preprint

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2016-02-12
08:39
Observation of Gravitational Waves from a Binary Black Hole Merger / , /LIGO Scientific Collaboration ; Virgo Collaboration
On September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from 35 to 250 Hz with a peak gravitational-wave strain of $1.0 \times 10^{-21}$. [...]
arXiv:1602.03837; LIGO-P150914.- 2016 - 16 p. - Published in : Phys. Rev. Lett. 116 (2016) 061102 External link: Preprint

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2016-02-12
08:39
Local bursts model of primordial CMB temperature fluctuations: scattering in hydrogen lines / Dubrovich, V K ; Grachev, S I
Within the framework of a flat cosmological model a propagation of an instantaneous burst of isotropic radiation is considered from the moment of its beginning at some initial redshift z0 to the moment of its registration now (at z=0). Thomson scattering by free electrons and scattering in primordial hydrogen lines Ha, Hb, Pa and Pb are considered as the sources of opacity and when calculating an albedo of a single scattering in the lines we take into account deactivation of the upper levels of transitions by background blackbody radiation. [...]
arXiv:1602.03695.- 2016 - 20 p. - Published in : Astron. Lett.: 41 (2015) , pp. 537 External link: Preprint

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