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Sep 23, 2013
09/13

by
Khodabakhsh Hessami Pilehrood; Tatiana Hessami Pilehrood

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We establish a $q$-analogue of the Bailey-Borwein-Bradley identity generating accelerated series for even zeta values and prove $q$-analogues of Markov's and Amdeberhan's series for $\zeta(3)$ using the $q$-Markov-WZ method.

Source: http://arxiv.org/abs/0903.2843v1

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Sep 23, 2013
09/13

by
L. H. Ford; N. F. Svaiter

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Quantum fluctuations in the density of a fluid with a linear phonon dispersion relation are studied. In particular, we treat the changes in these fluctuations due to non-classical states of phonons and to the presence of boundaries. These effects are analogous to similar effects in relativistic quantum field theory, and we argue that the case of the fluid is a useful analog model for effects in field theory. We further argue that the changes in the mean squared density are in principle...

Source: http://arxiv.org/abs/0903.2694v1

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Sep 23, 2013
09/13

by
Xavier Caicedo; Ricardo Oscar Rodriguez

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In this paper we consider an approach where both propositions and the accessibility relation are infinitely many-valued over G\"{o}del algebras. In particular, we consider separately the $\Box $-fragment and the $\Diamond $-fragment of our G\"{o}del modal logic and prove that both logics are complete with respect to the class of models with values in the linear Hetying algebra [0,1]. In addition, we show that the first fragment is uniquely determined by the class of models having...

Source: http://arxiv.org/abs/0903.2767v1

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Sep 23, 2013
09/13

by
Ties Behnke; Klaus Dehmelt; Takeshi Matsuda; Peter Schade

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The use of a TPC in future collider experiments needs significant research and development. Within the EUDET program an infrastructure has been designed and built to allow the efficient testing of TPC prototypes under realistic conditions. The infrastructure consists of a test beam facility, located at DESY Hamburg, and a multi-purpose TPC field cage.

Source: http://arxiv.org/abs/0903.2803v1

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Sep 23, 2013
09/13

by
P. Boumis; J. Meaburn; M. Lloyd; S. Akras

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A deep wide-field image in the light of the Halpha+[N II] emission lines, of the planetary nebula HFG1 which surrounds the precataclysmic binary system V664 Cas, has revealed a tail of emission at least 20' long, at a position angle of 316deg. Evidence is presented which suggests that this is an ~10^5 y old trail of shocked material, left behind V664 Cas as it ejects matter whilst ploughing through its local interstellar media at anywhere between 29 and 59 km/s depending on its distance from...

Source: http://arxiv.org/abs/0903.2852v1

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Sep 22, 2013
09/13

by
A. Fruehbis-Krueger

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Two main algorithmic approaches are known for making Hironaka's proof of resolution of singularities in characteristic zero constructive. Their main difference is the use of different notions of transforms during the resolution process and the use of a stratification by the Hilbert-Samuel function in the one using the strict transform. In this article, a (hybrid-type) algorithmic approach is proposed which allows the use of the strict transform without the full impact of the complexity of the...

Source: http://arxiv.org/abs/0812.1776v2

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Sep 20, 2013
09/13

by
Yi Ni

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Ozsvath and Szabo proved that knot Floer homology determines the genera of knots in S^3. We will generalize this deep result to links in homology 3-spheres, by adapting their method. Our proof relies on a result of Gabai and some constructions related to foliations. We also interpret a theorem of Kauffman in the world of knot Floer homology, hence we can compute the top filtration term of the knot Floer homology for alternative links.

Source: http://arxiv.org/abs/math/0506208v4

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Sep 23, 2013
09/13

by
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 low-stretch 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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Sep 23, 2013
09/13

by
Kang Ning

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The DNA cryptography is a new and very promising direction in cryptography research. DNA can be used in cryptography for storing and transmitting the information, as well as for computation. Although in its primitive stage, DNA cryptography is shown to be very effective. Currently, several DNA computing algorithms are proposed for quite some cryptography, cryptanalysis and steganography problems, and they are very powerful in these areas. However, the use of the DNA as a means of cryptography...

Source: http://arxiv.org/abs/0903.2693v1

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Oct 29, 2014
10/14

by
Smith, J; Baer, L; Blank, S; Dilawari, A; Carapetyan, K; Alvear, M; Utate, M; Curtin, J; Muggia, F

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This article is from ecancermedicalscience , volume 3 . Abstract Introduction: We describe a screening and prevention programme primarily targeting under-served minority women at high risk of breast and/or ovarian cancer. Women attending this Bellevue Hospital Center (BHC) Clinic were either self-referred from a variety of special outreach programmes or referred internally by medical professionals caring for relatives or friends. Our objective was to delineate referral sources and preliminary...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3224011

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Sep 23, 2013
09/13

by
Robert Koenig; Stephanie Wehner

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A fully general strong converse for channel coding states that when the rate of sending classical information exceeds the capacity of a quantum channel, the probability of correctly decoding goes to zero exponentially in the number of channel uses, even when we allow code states which are entangled across several uses of the channel. Such a statement was previously only known for classical channels and the quantum identity channel. By relating the problem to the additivity of minimum output...

Source: http://arxiv.org/abs/0903.2838v1

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Sep 23, 2013
09/13

by
Kavan Modi

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In recent years there has been a significant development of the dynamical map formalism for initially correlated states of a system and its environment. Based on some of these results, we study quantum process tomography for initially correlated states of the system and the environment. This is beyond the usual assumption that the state of the system and the environment are initially uncorrelated. Since quantum process tomography is an experimental procedure, we wind up having to study the role...

Source: http://arxiv.org/abs/0903.2724v1

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Sep 23, 2013
09/13

by
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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Sep 18, 2013
09/13

by
Martin Lorenz

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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 G-action on the spectrum Spec R of all prime ideals of R, viewed as a topological space with the Jacobson-Zariski 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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Sep 23, 2013
09/13

by
Konrad Schmuedgen

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In this paper we investigate a *-algebra $\cX$ of fractions associated with a unital complex *-algebra $\cA$. The algebra $\cX$ and its Hilbert space representations are used to prove abstract noncommutative strict Positivstellens\"atze for $\cA$. Multi-grading of $\cA$ are studied as technical tools to verify the assumptions of this theorem. As applications we obtain new strict Positivstellens\"atze for the Weyl algebra and for the Lie algebra $\cg$ of the affine group of the real...

Source: http://arxiv.org/abs/0903.2708v1

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Sep 21, 2013
09/13

by
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 tree-level 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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Sep 23, 2013
09/13

by
Jean-Francois Clément; Jean-Philippe Brantut; Martin Robert De Saint Vincent; Robert A. Nyman; A. Aspect; Thomas Bourdel; Philippe Bouyer

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We demonstrate runaway evaporative cooling directly with a tightly confining optical dipole trap and achieve fast production of condensates of 1.5x10^5 87Rb atoms. Our scheme is characterized by an independent control of the optical trap confinement and depth, permitting forced evaporative cooling without reducing the trap stiffness. Although our configuration is particularly well suited to the case of 87Rb atoms in a 1565nm optical trap, where an efficient initial loading is possible, our...

Source: http://arxiv.org/abs/0903.2745v1

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Sep 22, 2013
09/13

by
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 self-loops. 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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3.0

Jul 18, 2018
07/18

by
Commissioner of Printing, Government of Andhra Pradesh

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The Gazette of Andhra Pradesh Date: 2009-3-16 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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3.0

Jul 18, 2018
07/18

by
Commissioner of Printing, Government of Andhra Pradesh

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The Gazette of Andhra Pradesh Date: 2009-3-16 Department: LAW Gazette Number: 146 Gazette Type: EXTRAORDINARY Issued By: COMMISSIONER OF PRINTING Part Number: PART I Subject: SELECTION OF CIVIL JUDGES BY THE HIGH COURT OF ANDHRA PRADESH – NAMES OF SELECTED CANDIDATES APPROVED.

Topic: Andhra Gazette

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3.0

Jul 18, 2018
07/18

by
Commissioner of Printing, Government of Andhra Pradesh

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The Gazette of Andhra Pradesh Date: 2009-3-16 Department: Others Gazette Number: 45 Gazette Type: EXTRAORDINARY Issued By: COMMISSIONER OF PRINTING Part Number: PART II Subject: PRIVATE ADVERTISEMENTS CHANGE OF NAMES

Topic: Andhra Gazette

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Sep 23, 2013
09/13

by
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 six-order 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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Sep 23, 2013
09/13

by
F. Feroz; M. P. Hobson; L. Roszkowski; R. Ruiz de Austri; R. Trotta

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We employ two different statistical tests to examine whether, in the framework of the Constrained MSSM, the experimentally determined values of BR(b->s gamma) and the anomalous magnetic moment of the muon, (g-2), are consistent with each other. Our tests are designed to compare the theoretical predictions of the CMSSM in data space with the actual measurements, once all of the CMSSM free parameters have been integrated out and constrained using all other available data. We investigate the...

Source: http://arxiv.org/abs/0903.2487v1

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Sep 23, 2013
09/13

by
Brendon W. Lovett; Ahsan Nazir

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Coherence is a familiar concept in physics: It is the driving force behind wavelike phenomena such as the diffraction of light. Moreover, wave-particle duality implies that all quantum objects can exhibit coherence, and this quantum coherence is crucial to understanding the behaviour of a plethora of systems. In this article, which is written at an undergraduate level, we shall briefly introduce what is meant by coherence in a well-known classical setting, before going on to describe its...

Source: http://arxiv.org/abs/0903.2746v1

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Sep 23, 2013
09/13

by
Frans Snik

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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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Sep 23, 2013
09/13

by
Hichem Hajaiej

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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 Riesz-type functionals with constraints.

Source: http://arxiv.org/abs/0903.2821v1

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Sep 23, 2013
09/13

by
N. N. Nikolaev; V. R. Zoller

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One of the well known effects of the asymptotic freedom is splitting of the leading-$\log$ BFKL pomeron into a series of isolated poles in complex angular momentum plane. Following our earlier works we explore the phenomenological consequences of the emerging BFKL-Regge factorized expansion for the small-$x$ charm ($F_2^c$) and beauty ($F_{2}^{b}$) structure functions of the proton. As we found earlier,the color dipole approach to the BFKL dynamics predicts uniquely decoupling of subleading...

Source: http://arxiv.org/abs/0903.2729v1

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Sep 17, 2013
09/13

by
Tobias Salger; Gunnar Ritt; Carsten Geckeler; Sebastian Kling; Martin Weitz

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We report on experiments studying transport properties of an atomic Bose-Einstein condensate in an optical lattice of spatial period $\lambda/2n$, where $n$ is an integer, realized with the dispersion of multiphoton Raman transitions. We observe Bloch oscillations, as a clear effect of quantum transport, in the sub-wavelength scale periodicity lattice. The unusually strong localisation of atoms is evident from the measured effective mass. Future prospects of the novel lattice structures are...

Source: http://arxiv.org/abs/0711.1772v3

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Sep 23, 2013
09/13

by
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 n-fold concatenation of the memory channel is unitarily equivalent to the direct product of n single-mode lossy bosonic channels.

Source: http://arxiv.org/abs/0903.2764v1

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Sep 23, 2013
09/13

by
Alexander Makin

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We consider the spectral problem generated by the Sturm-Liouville equation with an arbitrary complex-valued potential q(x) and irregular boundary conditions. We establish necessary and sufficient conditions for a set of complex numbers to be the spectrum of such an operator.

Source: http://arxiv.org/abs/0903.2699v1

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Oct 28, 2014
10/14

by
Razi, Tahmine; Moslemzade, Seyed Hosein; Razi, Sedighe

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This article is from Journal of Dental Research, Dental Clinics, Dental Prospects , volume 3 . Abstract Background and aims: Panoramic radiography is a method widely used because of low absorbed dose in patients (ap-proximately 10 times less than that in the full mouth survey), reasonable cost and time. Disadvantages of this radiography technique are magnification and distortion as a result of unequal magnification, which can influence dimensional and angular measurements used in clinical...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3517203

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Oct 25, 2014
10/14

by
Koodaryan, Roodabeh; Rafighi, Ali; Hafezeqoran, Ali

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This article is from Journal of Dental Research, Dental Clinics, Dental Prospects , volume 3 . Abstract Background and aims: Class III malocclusions are considered complex and difficult orthodontic problems to diagnose and treat. The purpose of this study was to investigate the morphologic characteristics of the craniofacial complex of adults with Class III malocclusion in an Iranian population. Materials and methods: Lateral cephalometric radiographs of 50 patients with Class III malocclusion...

Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3517198

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Sep 23, 2013
09/13

by
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 H-band and 7 intermediate bands covering the NIR K-band. 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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Sep 23, 2013
09/13

by
Jose A. Diaz-Garcia; R. Gutierrez-Jaimez

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Several matrix variate hypergeometric type distributions are derived. The compound distributions of left-spherical matrix variate elliptical distributions and inverted hypergeometric type distributions with matrix arguments are then proposed. The scale mixture of left-spherical matrix variate elliptical distributions and univariate inverted hypergeometric type distributions is also derived as a particular case of the compound distribution approach.

Source: http://arxiv.org/abs/0903.2875v1

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Sep 18, 2013
09/13

by
Yonina C. Eldar

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A traditional assumption underlying most data converters is that the signal should be sampled at a rate exceeding twice the highest frequency. This statement is based on a worst-case scenario in which the signal occupies the entire available bandwidth. In practice, many signals are sparse so that only part of the bandwidth is used. In this paper, we develop methods for low-rate sampling of continuous-time sparse signals in shift-invariant (SI) spaces, generated by m kernels with period T. We...

Source: http://arxiv.org/abs/0806.3332v2

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Sep 23, 2013
09/13

by
Karine Beauchard; Jean-Michel Coron; Pierre Rouchon

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We study the controllability of the Bloch equation, for an ensemble of non interacting half-spins, in a static magnetic field, with dispersion in the Larmor frequency. This system may be seen as a prototype for infinite dimensional bilinear systems with continuous spectrum, whose controllability is not well understood. We provide several mathematical answers, with discrimination between approximate and exact controllability, and between finite time or infinite time controllability: this system...

Source: http://arxiv.org/abs/0903.2720v1

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Sep 23, 2013
09/13

by
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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Sep 23, 2013
09/13

by
V. Soltan

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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 m-dimensional 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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Sep 23, 2013
09/13

by
Bogdan Mihaila; Andres Cardenas

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We study the ground-state properties of a dilute gas of strongly-interacting fermions in the framework of the coupled-cluster expansion (CCE). We demonstrate that properties such as universality, opening of a gap in the excitation spectrum and applicability of s-wave approximations appear naturally in the CCE approach. In the zero-density limit, we show that the ground-state energy density depends on only one parameter which in turn may depend at most on the spatial dimensionality of the system.

Source: http://arxiv.org/abs/0903.2786v1

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Sep 23, 2013
09/13

by
Lianfeng Long; Changming Xiao

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Combined with the principle of entropy maximum and CS state equation, the critical size for a cluster to nucleate then the critical volume fraction of a phase transition is determined in this paper, and our result is in good agreement with the experiments. Furthermore, no parameter is introduced in the discussion.

Source: http://arxiv.org/abs/0903.2698v1

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Sep 22, 2013
09/13

by
L. Ferroni; V. Koch

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We formulate a simple model for a gas of extended hadrons at zero chemical potential by taking inspiration from the compressible bag model. We show that a crossover transition qualitatively similar to lattice QCD can be reproduced by such a system by including some appropriate additional dynamics. Under certain conditions, at high temperature, the system consist of a finite number of infinitely extended bags, which occupy the entire space. In this situation the system behaves as an ideal gas of...

Source: http://arxiv.org/abs/0812.1044v2

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Sep 23, 2013
09/13

by
G. Hector; E. Macías-Virgós; E. Sanmartín-Carbón

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Let $(M,\mathcal{F})$ be a foliated manifold. We prove that there is a canonical isomorphism between the complex of base-like 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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Sep 23, 2013
09/13

by
Babak Vakili

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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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Sep 23, 2013
09/13

by
S. Qian; L. Zhu; S. Zola; W. Liao; L. Liu; L. Li; M. Winiarski; E. Kuligowska; J. Kreiner

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HS 0705+6700 is a short-period (P=2.3 hours), close binary containing a hot sdB-type primary and a fully convective secondary. We have monitored this eclipsing binary for more than 2 years and as a result, 32 times of light minimum were obtained. Based on our new eclipse times together with these compiled from the literature, it is discovered that the O-C curve of HS 0705+6700 shows a cyclic variation with a period of 7.15 years and a semiamplitude of 92.4 s. The periodic change was analyzed...

Source: http://arxiv.org/abs/0903.1357v2

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Sep 23, 2013
09/13

by
Sarah E. Ragan; Edwin A. Bergin; Robert A. Gutermuth

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We have conducted a survey of a sample of infrared-dark clouds (IRDCs) with the Spitzer Space Telescope in order to explore their mass distribution. We present a method for tracing mass using dust absorption against the bright Galactic background at 8 microns. The IRDCs in this sample are comprised of tens of clumps, ranging in sizes from 0.02 to 0.3 pc in diameter and masses from 0.5 to a few 10 Msun, the broadest dynamic range in any clump mass spectrum study to date. Structure with this...

Source: http://arxiv.org/abs/0903.2771v1

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Sep 23, 2013
09/13

by
F. Breitling

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This work reports on the discovery of HESS J1514-591, a VHE gamma-ray source found at the pulsar wind nebula (PWN) MSH 15-52 and its associated pulsar PSR B1509-58. The discovery was made with the High Energy Stereoscopic System (H.E.S.S.), which currently provides the most sensitive measurement in the energy range of about 0.2-100 TeV. This analysis is the first to include all H.E.S.S. data from observations dedicated to MSH 15-52. The corresponding flux above 1 TeV is...

Source: http://arxiv.org/abs/0903.2056v2

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Jul 22, 2013
07/13

by
Jorge Noronha; Miklos Gyulassy; Giorgio Torrieri

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We show that far zone Mach and diffusion wake ``holograms'' produced by supersonic strings in anti--de Sitter space/conformal field theory (AdS/CFT) correspondence do not lead to observable conical angular correlations in the strict $N_c\to\infty$ supergravity limit if Cooper-Frye hadronization is assumed. However, a special {\em nonequilibrium} ``neck'' zone near the jet is shown to produce an apparent sonic boom azimuthal angle distribution that is roughly independent of the heavy quark's...

Source: http://arxiv.org/abs/0807.1038v2

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26

Sep 23, 2013
09/13

by
Wen-Li Yang; Yao-Zhong Zhang; Samuel Kault

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Based on the particular orderings introduced for the positive roots of finite dimensional basic Lie superalgebras, we construct the explicit differential operator representations of the $osp(2r|2n)$ and $osp(2r+1|2n)$ superalgebras and the explicit free field realizations of the corresponding current superalgebras $osp(2r|2n)_k$ and $osp(2r+1|2n)_k$ at an arbitrary level $k$. The free field representations of the corresponding energy-momentum tensors and screening currents of the first kind are...

Source: http://arxiv.org/abs/0810.3719v2

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33

Sep 23, 2013
09/13

by
Jong-Geon Bu; Jae Hyung Yee; Hyeong-Chan Kim

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The differential structure on the kappa-Minkowski spacetime from Jordanian twist of Weyl algebra is constructed, and it is shown to be closed in 4-dimensions in contrast to the conventional formulation. Based on this differential structure, we have formulated a scalar field theory in this kappa-Minkowski spacetime.

Source: http://arxiv.org/abs/0903.0040v2

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43

Sep 23, 2013
09/13

by
Ghaya Baili; Mehdi Alouini; Thierry Malherbe; Daniel Dolfi; Isabelle Sagnes; Fabien Bretenaker

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The transition between the class-B and class-A dynamical behaviors of a semiconductor laser is directly observed by continuously controlling the lifetime of the photons in a cavity of sub-millimetric to centimetric length. It is experimentally and theoretically proved that the transition from a resonant to an overdamped behavior occurs progressively, without any discontinuity. In particular, the intermediate regime is found to exhibit features typical from both the class-A and class-B regimes....

Source: http://arxiv.org/abs/0903.2827v1