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Recent muon and neutron experiments on the new FeAsbased superconductors revealed phase diagrams characterized by firstorder evolution from antiferromagnetic to superconducting states, and an inelastic magnetic resonance mode whose energy scales as $\sim 4 k_{B}T_{c}$. These features exhibit striking commonalities with cuprate, backyball, organic, and heavyfermion superconductors as well as superfluid $^{4}$He.
Source: http://arxiv.org/abs/0903.2758v1
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A. Yamasaki; S. Imada; K. Takase; T. Muro; Y. Kato; H. Kobori; A. Sugimura; N. Umeyama; H. Sato; Y. Hara; N. Miyakawa; S. I. Ikeda
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We have investigated the electronic structures of newly discovered superconductor FeSe1x by bulksensitive photoemission spectroscopy (PES). The large Fe 3d spectral weight is located in the vicinity of the Fermi level (EF) and it decreases steeply toward EF . Compared with results of band structure calculations, narrowing the Fe 3d band width and the energy shift of the band toward EF are found, suggesting a mass enhancement due to the weak electron correlation effect. Meanwhile, Fe 2p...
Source: http://arxiv.org/abs/0902.3314v3
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The effects of noncommutativity and deformed Heisenberg algebra on the evolution of a two dimensional minisuperspace quantum cosmological model are investigated.
Source: http://arxiv.org/abs/0903.2789v1
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Many objects on the sky exhibit a centrosymmetric polarization pattern, particularly in cases involving single scattering around a central source. Utilizing a novel liquid crystal device (the ``theta cell'') that transforms the coordinate system of linear polarization in an image plane from Cartesian to polar, the observation of centrosymmetric polarization patterns can be improved: instead of measuring Stokes Q and U on the sky, one only needs to measure Stokes Q' in the new instrument...
Source: http://arxiv.org/abs/0903.2734v1
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Quantum chromodynamics predicts that the interaction between its fundamental constituents, quarks and gluons, can lead to different states of strongly interacting matter, dependent on its temperature and baryon density. We first survey the possible states of matter in QCD and discuss the transition from a colorconfining hadronic phase to a plasma of deconfined colored quarks and gluons. Next, we summarize the results from nonperturbative studies of QCD at finite temperature and baryon...
Source: http://arxiv.org/abs/0903.2778v1
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T. Fujita; M. B. A. Jalil; S. G. Tan
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A semiclassical description of the intrinsic spinHall effect (SHE) is presented which is relevant for a wide class of systems. A heuristic model for the SHE is developed, starting with a fully quantum mechanical treatment, from which we construct an intuitive expression for the spinHall current and conductivity. Our method makes transparent the physical mechanism which drives the effect, and unifies the SHE across several spintronic and optical systems. Finally, we propose an analogous...
Source: http://arxiv.org/abs/0903.2702v1
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Arie Leizarowitz
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The paper is concerned with estimating the number of integers smaller than $x$ whose largest prime divisor is smaller than $y$, denoted $\psi (x,y)$. Much of the related literature is concerned with approximating $\psi (x,y)$ by Dickman's function $\rho (u)$, where $u=\ln x/\ln y$. A typical such result is that $$ \psi (x,y)=x\rho (u)(1+o(1)) \eqno (1) $$ in a certain domain of the parameters $x$ and $y$. In this paper a different type of approximation of $\psi (x,y)$, using iterated logarithms...
Source: http://arxiv.org/abs/0903.2712v1
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Let G be an affine algebraic group and let R be an associative algebra with a rational action of G by algebra automorphisms. We study the induced Gaction on the spectrum Spec R of all prime ideals of R, viewed as a topological space with the JacobsonZariski topology, and on the subspace consisting of all rational ideals of R. Here, a prime ideal P of R is said to be rational if the extended centroid of R/P is equal to the base field. The main themes of the article are local closedness of...
Source: http://arxiv.org/abs/0809.5205v2
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Topcolorassisted technicolor (TC2) model predicts the existence of the toppions and the CPeven topHiggs with large flavorchanging couplings to the top quark, which at treelevel can mediate the top quark threebody decay t > cb\bar{b}. In this work we study this decay, showing the dependence of the decay rate on the relevant TC2 parameters and comparing the results with the predictions in the minimal supersymmetric model. We find that the decay rate in the TC2 model is much larger than...
Source: http://arxiv.org/abs/0903.2619v1
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Rainer M. Buchholz; Rainer Schödel; Andreas Eckart
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The goals of this work are to develop a new method to separate early and late type stellar components of a dense stellar cluster based on narrow band filters, to apply it to the central parsec of the GC, and to conduct a population analysis of this area. We use AO assisted observations obtained at the ESO VLT in the NIR Hband and 7 intermediate bands covering the NIR Kband. A comparison of the resulting SEDs with a blackbody of variable extinction then allows us to determine the presence and...
Source: http://arxiv.org/abs/0903.2135v2
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Hamid R. Molavian; Michel J. P. Gingras
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Despite a CurieWeiss temperature $\theta_{\rm CW} \sim 14$ K, the Tb2Ti2O7 pyrochlore magnetic material lacks long range magnetic order down to at least $T^*\approx 50$ mK. It has recently been proposed that the low temperature collective paramagnetic or spin liquid regime of this material may be akin to a spin ice state subject to both thermal and quantum fluctuations $$ a {\it quantum spin ice} (QSI) of sorts. Here we explore the effect of a magnetic field ${\bm B}$ along the $[111]$...
Source: http://arxiv.org/abs/0809.3477v2
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K. Sakkos; J. Casulleras; J. Boronat
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High order actions proposed by Chin have been used for the first time in path integral Monte Carlo simulations. Contrarily to the TakahashiImada action, which is accurate to fourth order only for the trace, the Chin action is fully fourth order, with the additional advantage that the leading fourth and sixth order error coefficients are finely tunable. By optimizing two free parameters entering in the new action we show that the time step error dependence achieved is best fitted with a sixth...
Source: http://arxiv.org/abs/0903.2763v1
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Shirley Ho; Simon Dedeo; David Spergel
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We present a new method for detecting the missing baryons by generating a template for the kinematic SunyaevZel'dovich effect. The template is computed from the product of a reconstructed velocity field with a galaxy field; we find that the combination of a galaxy redshift survey such as SDSS and a CMB survey such as ACT and PLANCK can detect the kSZ, and thus the ionized gas, at significant signaltonoise. Unlike other techniques that look for hot gas or metals, this approach directly...
Source: http://arxiv.org/abs/0903.2845v1
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L. R. Bedin; M. Salaris; G. Piotto; J. Anderson; I. R. King; S. Cassisi
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We use 14 orbits of ACS observations to reach the end of the whitedwarf cooling sequence in the globular cluster M4. Our photometry and completeness tests show that the end is located at magnitude m_F606W = 28.5+/0.1, which implies an age of 11.6+/0.6 Gyr (internal errors only). This is consistent with the age from fits to the main sequence turnoff (12.0+/1.4 Gyr).
Source: http://arxiv.org/abs/0903.2839v1
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G. Hector; E. MacíasVirgós; E. SanmartínCarbón
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Let $(M,\mathcal{F})$ be a foliated manifold. We prove that there is a canonical isomorphism between the complex of baselike forms $\Omega^*_b(M,\mathcal{F})$ of the foliation and the "De Rham complex" of the space of leaves $M/\mathcal{F}$ when considered as a "diffeological" quotient. Consequently, the two corresponding cohomology groups $H^*_b(M,\mathcal{F})$ and $H^*(M/\mathcal{F})$ are isomorphic.
Source: http://arxiv.org/abs/0903.2871v1
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L. Dunne; R. J. Ivison; S. Maddox; M. Cirasuolo; A. M. Mortier; S. Foucaud; E. Ibar; O. Almaini; C. Simpson; R. McLure
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We have studied the uJy radio properties of Kselected galaxies detected in the UltraDeep Survey portion of UKIDSS using 610 and 1,400MHz images from the VLA and GMRT. These deep radio mosaics, combined with the largest and deepest K image currently available, allow highS/N detections of many Kselected subpopulations, including sBzK and pBzK starforming and passive galaxies. We find a strong correlation between the radio and K fluxes and a linear relationship between SFR and K...
Source: http://arxiv.org/abs/0808.3139v2
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Franziska Synatschke; Georg Bergner; Holger Gies; Andreas Wipf
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We study supersymmetric quantum mechanics with the functional RG formulated in terms of an exact and manifestly offshell supersymmetric flow equation for the effective action. We solve the flow equation nonperturbatively in a systematic supercovariant derivative expansion and concentrate on systems with unbroken supersymmetry. Already at nexttoleading order, the energy of the first excited state for convex potentials is accurately determined within a 1% error for a wide range of couplings...
Source: http://arxiv.org/abs/0809.4396v2
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Andreas Luscher; Andreas Laeuchli
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We study the field dependence of the antiferromagnetic spin1/2 Heisenberg model on the square lattice by means of exact diagonalizations. In a first part, we calculate the spinwave velocity, the spinstiffness, and the magnetic susceptibility and thus determine the microscopic parameters of the lowenergy longwavelength description. In a second part, we present a comprehensive study of dynamical spin correlation functions for magnetic fields ranging from zero up to saturation. We find that...
Source: http://arxiv.org/abs/0812.3420v3
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Cosmo Lupo; Vittorio Giovannetti; Stefano Mancini
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We introduce a general model for a lossy bosonic memory channel and calculate the classical and the quantum capacity, proving that coherent state encoding is optimal. The use of a proper set of collective field variables allows to unravel the memory, showing that the nfold concatenation of the memory channel is unitarily equivalent to the direct product of n singlemode lossy bosonic channels.
Source: http://arxiv.org/abs/0903.2764v1
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M. Battaglia; L. Fletcher; A. O. Benz
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In the classical flare picture, hard Xray emission from the chromosphere is succeeded by softXray emission from hot plasma in the flare loop, the soft Xray emission being a direct consequence of the impact of the nonthermal particle beam. However, observations of events exist in which a pronounced increase in soft Xray emission is observed minutes before the onset of the hard Xray emission. Such preflare emission clearly contradicts the classical flare picture. For the first time, the...
Source: http://arxiv.org/abs/0903.2754v1
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Daniel A Spielman; Jaeoh Woo
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Boman and Hendrickson observed that one can solve linear systems in Laplacian matrices in time $\bigO{m^{3/2 + o (1)} \ln (1/\epsilon)}$ by preconditioning with the Laplacian of a lowstretch spanning tree. By examining the distribution of eigenvalues of the preconditioned linear system, we prove that the preconditioned conjugate gradient will actually solve the linear system in time $\softO{m^{4/3} \ln (1/\epsilon)}$.
Source: http://arxiv.org/abs/0903.2816v1
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A. K. Kwasniewski
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The way to arrive at formula of zeta matrix for any graded posets with the finite set of minimal elements is delivered following the first reference. This is being achieved via adjacency and zeta matrix description of bipartite digraphs chains, the representatives of graded posets. The bipartite digraphs elements of such chains amalgamate to form corresponding cover relation graded poset digraphs with corresponding adjacency matrices being amalgamated throughout natural join as special adequate...
Source: http://arxiv.org/abs/0901.0155v2
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Government of Odisha
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Odisha Gazette Odisha Government Press Note: Some issues of the Odisha do not have embedded fonts. We apologize for the typographical inconvenience and will attempt to correct at the soonest. Label Date: 20090302 Gazette Date: 20090316 Gazette Number: 381 Department: SCHOOL and MASS EDUCATION Notification Number: 4307 Subject: Notice Source URL
Topic: Odisha Gazette
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Government of Odisha
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Odisha Gazette Odisha Government Press Note: Some issues of the Odisha do not have embedded fonts. We apologize for the typographical inconvenience and will attempt to correct at the soonest. Label Date: 20090226 Gazette Date: 20090316 Gazette Number: 380 Department: SCHOOL and MASS EDUCATION Notification Number: 3823 Subject: Resolution Source URL
Topic: Odisha Gazette
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Government of Odisha
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Odisha Gazette Odisha Government Press Note: Some issues of the Odisha do not have embedded fonts. We apologize for the typographical inconvenience and will attempt to correct at the soonest. Label Date: 20090219 Gazette Date: 20090316 Gazette Number: 372 Department: LABOUR and EMPLOYEES’ STATE INSURANCE Notification Number: 1667 Subject: Award Source URL
Topic: Odisha Gazette
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HERAB Collaboration
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Inclusive doubly differential cross sections d^2\sigma_{pA}/dx_Fdp_T^2 as a function of Feynmanx (x_F) and transverse momentum (p_T) for the production of K^0_s, Lambda^0 and antiLambda^0 in protonnucleus interactions at 920 GeV are presented. The measurements were performed by HERAB in the negative x_F range (0.12
Source: http://arxiv.org/abs/0812.0471v2
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Alexander John; Andreas Schadschneider; Debashish Chowdhury; Katsuhiro Nishinari
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We report experimental results on unidirectional trafficlike collective movement of ants on trails. Our work is primarily motivated by fundamental questions on the collective spatiotemporal organization in systems of interacting motile constituents driven far from equilibrium. Making use of the analogies with vehicular traffic, we analyze our experimental data for the spatiotemporal organisation of the ants on the trail. From this analysis, we extract the flowdensity relation as well as the...
Source: http://arxiv.org/abs/0903.2717v1
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Directorate of Printing, Government of India
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The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 1107 Ministry: Election Commission of India Subject: Amendment in the Notification No. 434/UPHP/2008 dated 12th June, 2008.
Topic: Extraordinary Gazette of India
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Commissioner of Printing, Government of Andhra Pradesh
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The Gazette of Andhra Pradesh Date: 2009316 Department: WOMEN DEVELOPMENT, CHILD AND DISABLED WELFARE Gazette Number: 145 Gazette Type: EXTRAORDINARY Issued By: COMMISSIONER OF PRINTING Part Number: PART I Subject: SMT. V. VENKATA LAKSHMI, ASSISTANT DIRECTOR, O/O DIRECTOR, WOMEN DEVELOPMENT AND CHILD WELFARE, HYDERABAD FORMERLY PROJECT DIRECTOR, DISTRICT WOMEN AND CHILD DEVELOPMENT AGENCY, ELURU, WEST GODAVARI DISTRICT IS DISMISSED FROM SERVICE.
Topic: Andhra Gazette
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HansJoachim Baues
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We describe a conjecture on the algebra of higher cohomology operations which leads to the computations of the differentials in the Adams spectral sequence. For this we introduce the notion of an nth order track category which is suitable to study higher order Toda brackets and the differentials in spectral sequences. We describe various examples of higher order track categories which are topological, in particular the track category of higher cohomology operations. Also differential algebras...
Source: http://arxiv.org/abs/0903.2876v1
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Sergio Gomez; Pablo Jensen; Alex Arenas
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We present a reformulation of modularity that allows the analysis of the community structure in networks of correlated data. The new modularity preserves the probabilistic semantics of the original definition even when the network is directed, weighted, signed, and has selfloops. This is the most general condition one can find in the study of any network, in particular those defined from correlated data. We apply our results to a real network of correlated data between stores in the city of...
Source: http://arxiv.org/abs/0812.3030v2
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A. Morozov; Sh. Shakirov
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The simplest partition function, associated with homogeneous symmetric forms S of degree r in n variables, is integral discriminant J_{nr}(S) = \int e^{S(x_1 ... x_n)} dx_1 ... dx_n. Actually, Sdependence remains the same if e^{S} in the integrand is substituted by arbitrary function f(S), i.e. integral discriminant is a characteristic of the form S itself, and not of the averaging procedure. The aim of the present paper is to calculate J_{nr} in a number of nonGaussian cases. Using Ward...
Source: http://arxiv.org/abs/0903.2595v1
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For a large class of supermodular integrands, we establish conditions under which balls are the unique (up to translations) maximizers of the Riesztype functionals with constraints.
Source: http://arxiv.org/abs/0903.2821v1
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Extending results of Suss and Hadwiger (proved by them for the case of convex bodies and positive ratios), we show that compact (respectively, closed) convex sets in the Euclidean space of dimension n are homothetic provided for any given integer m between 2 and n  1 (respectively, between 3 and n  1), the orthogonal projections of the sets on every mdimensional plane are homothetic, where homothety ratio and its sign may depend on the projection plane. The proof uses a refined version of...
Source: http://arxiv.org/abs/0903.2836v1
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Let M be a closed 3manifold which can be triangulated with N simplices. We prove that any map from M to a genus 2 surface has Hopf invariant at most C^N. Let X be a closed oriented hyperbolic 3manifold with injectivity radius less than epsilon at one point. If there is a degree nonzero map from M to X, then we prove that epsilon is at least C^{N}.
Source: http://arxiv.org/abs/0709.1247v2
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J. M. Drummond; J. M. Henn
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We give an explicit formula for all tree amplitudes in N=4 SYM, derived by solving the recently presented supersymmetric treelevel recursion relations. The result is given in a compact, manifestly supersymmetric form and we show how to extract from it all possible component amplitudes for an arbitrary number of external particles and any arrangement of external particles and helicities. We focus particularly on extracting gluon amplitudes which are valid for any gauge theory. The formula for...
Source: http://arxiv.org/abs/0808.2475v4
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Government of Odisha
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Odisha Gazette Odisha Government Press Note: Some issues of the Odisha do not have embedded fonts. We apologize for the typographical inconvenience and will attempt to correct at the soonest. Label Date: 20090220 Gazette Date: 20090316 Gazette Number: 374 Department: LABOUR and EMPLOYEES’ STATE INSURANCE Notification Number: 1714 Subject: Award Source URL
Topic: Odisha Gazette
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Mario I. Molina; Yuri S. Kivshar
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We study twocolor surface solitons in twodimensional photonic lattices with quadratic nonlinear response. We demonstrate that such parametrically coupled optical localized modes can exist in the corners or at the edges of a square photonic lattice, and we analyze the impact of the phase mismatch on their properties, stability, and the threshold power for their generation.
Source: http://arxiv.org/abs/0903.2858v1
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Tomoko Mizuguchi; Takashi Odagaki
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A monatomic simple liquid in two dimensions, where atoms interact isotropically through the LennardJonesGauss potential [M. Engel and H.R. Trebin, Phys. Rev. Lett. 98, 225505 (2007)], is vitrified by the use of a rapid cooling technique in a molecular dynamics simulation. Transformation to a crystalline state is investigated at various temperatures and the timetemperaturetransformation (TTT) curve is determined. It is found that the transformation time to a crystalline state is the...
Source: http://arxiv.org/abs/0903.2333v2
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Xiaoyu Jiao; Yuan Gao; S. Y. Lou
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An approximate homotopy symmetry method for nonlinear problems is proposed and applied to the sixorder boussinesq equation. We summarize the general formulas for similarity reduction solutions and similarity reduction equations of different orders, educing the related homotopy series solutions. The convergence region of homotopy series solutions can be adjusted by the auxiliary parameter. Series solutions and similarity reduction equations from approximate symmetry method can be retrieved from...
Source: http://arxiv.org/abs/0903.2703v1
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T. Aaltonen; for the CDF Collaboration
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We present a measurement of the $\ttbar$ differential cross section with respect to the $\ttbar$ invariant mass, dSigma/dMttbar, in $\ppbar$ collisions at $\sqrt{s}=1.96$ TeV using an integrated luminosity of $2.7\invfb$ collected by the CDF II experiment. The $\ttbar$ invariant mass spectrum is sensitive to a variety of exotic particles decaying into $\ttbar$ pairs. The result is consistent with the standard model expectation, as modeled by \texttt{PYTHIA} with \texttt{CTEQ5L} parton...
Source: http://arxiv.org/abs/0903.2850v1
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We review the phenomenology of gravitino dark matter within supergravity framework. Gravitino can be dark matter if it is the lightest supersymmetric particle, which is stable if Rparity is conserved. There are several distinct scenarios depending on what the next to lightest supersymmetric particle (NLSP) is. We discuss the constraints and summarize the phenomenology of neutralino, stau, stop and sneutrino NLSPs.
Source: http://arxiv.org/abs/0903.2860v1
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G. van Harten; F. Snik; C. U. Keller
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In polarimetry it is important to characterize the polarization properties of the instrument itself to disentangle real astrophysical signals from instrumental effects. This article deals with the accurate measurement and modeling of the polarization properties of real aluminum mirrors, as used in astronomical telescopes. Main goals are the characterization of the aluminum oxide layer thickness at different times after evaporation and its influence on the polarization properties of the mirror....
Source: http://arxiv.org/abs/0903.2740v1
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A. S. Vardanyan; A. A. Kteyan; R. A. Vardanyan
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Within the framework of McLaughlinScott perturbation theory the equationofmotion of the dislocation kink in the pinning potential is linearized, assuming the simultaneous influence of ac and dc forces. Based on the equations derived, the probability of kink depinning was studied. The dependencies of the depinning probability on dc and ac forces are analyzed in details.
Source: http://arxiv.org/abs/0903.2700v1
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David J. Grynkiewicz; Luz Elimar Marchan; Oscar Ordaz
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Let $G$ be a finite abelian group and let $A\subseteq \mathbb{Z}$ be nonempty. Let $D_A(G)$ denote the minimal integer such that any sequence over $G$ of length $D_A(G)$ must contain a nontrivial subsequence $s_1... s_r$ such that $\sum_{i=1}^{r}w_is_i=0$ for some $w_i\in A$. Let $E_A(G)$ denote the minimal integer such that any sequence over $G$ of length $E_A(G)$ must contain a subsequence of length $G$, $s_1... s_{G}$, such that $\sum_{i=1}^{G}w_is_i=0$ for some $w_i\in A$. In this...
Source: http://arxiv.org/abs/0903.2810v1
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A. Y. AbulMagd; G. Akemann; P. Vivo
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Using Beck and Cohen's superstatistics, we introduce in a systematic way a family of generalised WishartLaguerre ensembles of random matrices with Dyson index $\beta$ = 1,2, and 4. The entries of the data matrix are Gaussian random variables whose variances $\eta$ fluctuate from one sample to another according to a certain probability density $f(\eta)$ and a single deformation parameter $\gamma$. Three superstatistical classes for $f(\eta)$ are usually considered: $\chi^2$, inverse $\chi^2$...
Source: http://arxiv.org/abs/0811.1992v2
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We develop the theory of rational ideals for arbitrary associative algebras R without assuming the standard finiteness conditions, noetherianness or the Goldie property. The AmitsurMartindale ring of quotients replaces the classical ring of quotients which underlies the previous definition of rational ideals but is not available in a general setting. Our main result concerns rational actions of an affine algebraic group G on R. Working over an algebraically closed base field, we prove an...
Source: http://arxiv.org/abs/0801.3472v3
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A. Bourque; C. Gale
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An alternative model for the dissociation of the J/psi is proposed. Chiral symmetry is properly implemented. Abnormal parity interactions and mesonic form factors naturally arise from the underlying quark substructure. Analytic confinement for the light quarks is generated by appropriately chosen the quark interaction kernels. Dissociation cross sections of the J/psi by either a pion or a rho meson are then evaluated and discussed.
Source: http://arxiv.org/abs/0809.3955v2
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Xiang Hao; Tao Pan; Taocheng Zang; Shiqun Zhu
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he multiqubit entangled states are coherently controlled in the quantum spin systems composed of $N+1$ interacting antiferromagnetic molecular rings. The tunable intermolecular couplings arise from the local exchange interactions between electron spins of $N$ circumjacent magnets and those of one central molecular ring. The quantum dynamics of such system is analytically deduced by the effective spin hamiltonian with anisotropic Heisenberg couplings. It is found that entangled $W$ states can be...
Source: http://arxiv.org/abs/0903.2705v1
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Stephen Kent; Mary Elizabeth Kaiser; Susana E. Deustua; J. Allyn Smith; Saul Adelman; Sahar Allam; Brian Baptista; Ralph C. Bohlin; James L. Clem; Alex Conley; Jerry Edelstein; Jay Elias; Ian Glass; Arne Henden; Steve Howell; Randy A. Kimble; Jeffrey W. Kruk; Michael Lampton; Eugene A. Magnier; Stephan R. McCandliss; Warren Moos; Nick Mostek; Stuart Mufson; Terry D. Oswalt; Saul Perlmutter; Carlos Allende Prieto; Bernard J. Rauscher; Adam Riess; Abhijit Saha; Mark Sullivan; Nicholas Suntzeff; Alan Tokunaga; Douglas Tucker; Robert Wing; Bruce Woodgate; Edward L. Wright
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The answers to fundamental science questions in astrophysics, ranging from the history of the expansion of the universe to the sizes of nearby stars, hinge on our ability to make precise measurements of diverse astronomical objects. As our knowledge of the underlying physics of objects improves along with advances in detectors and instrumentation, the limits on our capability to extract science from measurements is set, not by our lack of understanding of the nature of these objects, but rather...
Source: http://arxiv.org/abs/0903.2799v1