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2016-02-11
08:28
Ground-State Energy as a Simple Sum of Orbital Energies in Kohn-Sham Theory: A Shift in Perspective through a Shift in Potential / Levy, Mel (Department of Chemistry, Duke University, Durham, North Carolina 27708 ; Department of Physics, North Carolina A&T State University, Greensboro, North Carolina 27411) ; Zahariev, Federico (Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA)
It is observed that the exact interacting ground-state electronic energy of interest may be obtained directly, in principle, as a simple sum of orbital energies when a universal density-dependent term is added to $w\left(\left[ \rho \right];\mathbf{r} \right)$, the familiar Hartree plus exchange-correlation component in the Kohn-Sham effective potential. The resultant shifted potential, $\bar{w}\left(\left[ \rho \right];\mathbf{r} \right)$, actually changes less on average than $w\left(\left[ \rho \right];\mathbf{r} \right)$ when the density changes, including the fact that $\bar{w}\left(\left[ \rho \right];\mathbf{r} \right)$ does not undergo a discontinuity when the number of electrons increases through an integer. [...]
arXiv:1602.03267.- 2016 - 15 p. - Published in : Phys. Rev. Lett. 113 (2014) 113002 External link: Preprint

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2016-02-11
08:28
Interface-Flattening Transform for EM Field Modeling in Tilted, Cylindrically-Stratified Geophysical Media / Sainath, Kamalesh ; Teixeira, Fernando L
We propose and investigate an "interface-flattening" transformation, hinging upon Transformation Optics (T.O.) techniques, to facilitate the rigorous analysis of electromagnetic (EM) fields radiated by sources embedded in tilted, cylindrically-layered geophysical media. Our method addresses the major challenge in such problems of appropriately approximating the domain boundaries in the computational model while, in a full-wave manner, predicting the effects of tilting in the layers. [...]
arXiv:1602.03262.- 2016 - Published in : IEEE Antennas Wireless Propag. Lett. 13 (2014) 1808-1811 External link: Preprint

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2016-02-11
08:28
Correlated photon pair generation in AlGaAs nanowaveguides via spontaneous four-wave mixing / Kultavewuti, Pisek ; Zhu, Eric Y ; Qian, Li ; Pusino, Vincenzo ; Sorel, Marc ; Aitchison, J Stewart
We demonstrate a source of correlated photon pairs which will have applications in future integrated quantum photonic circuits. The source utilizes spontaneous four-wave mixing (SFWM) in a dispersion-engineered nanowaveguide made of AlGaAs, which has merits of negligible two-photon absorption and low spontaneous Raman scattering (SpRS). [...]
arXiv:1602.03096.- 2016 - Published in : Opt. Express 24 (2016) 3365-3376 External link: Preprint

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2016-02-11
08:28
Determining graphene's induced band gap with magnetic and electric emitters / Werra, Julia FM ; Krüger, Peter ; Busch, Kurt ; Intravaia, Francesco
We present numerical and analytical results for the lifetime of emitters in close proximity to graphene sheets. Specifically, we analyze the contributions from different physical channels that participate in the decay processes. [...]
arXiv:1602.03038.- 2016 - Published in : Phys. Rev. B 93, 081404(R) (2016) External link: Preprint

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2016-02-11
08:28
Model for probing membrane-cortex adhesion by micropipette aspiration and fluctuation spectroscopy / Alert, Ricard ; Casademunt, Jaume ; Brugués, Jan ; Sens, Pierre
We propose a model for membrane-cortex adhesion which couples membrane deformations, hydrodynamics and kinetics of membrane-cortex ligands. In its simplest form, the model gives explicit predictions for the critical pressure for membrane detachment and for the value of adhesion energy. [...]
arXiv:1602.03023.- 2016 - Published in : Biophys. J. 108 (2015) 1878 External link: Preprint

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2016-02-11
08:28
Activation cross-sections of proton induced reactions on $^{nat}$Sm up to 65 MeV / Tárkányi, F ; Hermanne, A ; Takács, S ; Ditrói, F ; Ignatyuk, A V
Activation cross sections for proton induced reactions on Sm are presented for the first time for $^{nat}$Sm(p,xn)$^{154,152m2,152m1,152g,150m,150g,149,148,147,146,145}$Eu, $^{nat}$Sm(p,x)$^{153,145}$Sm, $^{nat}$Sm(p,x)$^{151,150,149,148g,148m,146,144,143}$Pm and $^{nat}$Sm(p,x)$^{141}$Nd up to 65 MeV. The cross sections were measured via activation method by using a stacked-foil irradiation technique and high resolution gamma ray spectroscopy. [...]
arXiv:1602.03324.- 2016 - Published in : Nucl. Instrum. Methods Phys. Res., B 346 (2015) 26-44 External link: Preprint

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2016-02-11
08:27
Tensor space representations of Temperley-Lieb algebra via orthogonal projections of rank $r \geq 1$ / Bytsko, Andrei
Unitary representations of the Temperley-Lieb algebra $TL_N(Q)$ on the tensor space $({\mathbb C^n})^{\otimes N}$ are considered. Two criteria are given for determining when an orthogonal projection matrix $P$ of a rank $r$ gives rise to such a representation. [...]
arXiv:1503.06461.- 2016 - 26 p. - Published in : J.Math.Phys. 56 (2015) 083502 External link: Preprint

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2016-02-11
08:19
Late time accelerated scaling attractors in DGP (Dvali-Gabadadze-Porrati) braneworld / Dutta, Jibitesh ; Khyllep, Wompherdeiki ; Syiemlieh, Erickson
In the evolution of late universe, the main source of matter are Dark energy and Dark matter. They are indirectly detected only through their gravitational manifestations. [...]
arXiv:1602.03329.- 2016 - 18 p. - Published in : Eur. Phys. J. Plus (2016) 131: 33 External link: Preprint

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2016-02-11
08:19
Uniform Acceleration in General Relativity / Friedman, Yaakov ; Scarr, Tzvi
We extend de la Fuente and Romero's defining equation for uniform acceleration in a general curved spacetime from linear acceleration to the full Lorentz covariant uniform acceleration. In a flat spacetime background, we have explicit solutions. [...]
arXiv:1602.03067.- 2016 - 19 p. - Published in : Gen. Relativ. Gravit. 4 (2015) 7 External link: Preprint

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2016-02-11
08:15
Far-infrared study of tracers of oxygen chemistry in diffuse clouds / Wiesemeyer, H ; Güsten, R ; Heyminck, S ; Hübers, H W ; Menten, K M ; Neufeld, D A ; Richter, H ; Simon, R ; Stutzki, J ; Winkel, B et al.
Context. The chemistry of the diffuse interstellar medium rests upon three pillars: exothermic ion-neutral reactions (" cold chemistry "), endothermic neutral-neutral reactions with significant activation barriers (" warm chemistry "), and reactions on the surfaces of dust grains. [...]
arXiv:1602.03472.- 2016 - Published in : EDP Sciences 58 (2016) A76 External link: Preprint

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