ALBERT

Beschreibung: Im Juni 2011 hat der Wissenschaftliche Beirat Globale Umweltveränderungen (WBGU) sein neues Hauptgutachten zur "Großen Transformation" vorgelegt. Eine besondere Brisanz liegt in den wissenschaftspolitischen Empfehlungen. Was bedeuten diese Empfehlungen für die Wirtschafts- und Managementwissenschaften?

Beschreibung: Können Suffizienzstrategien, d.h. Ansätze des "Weniger", "Langsamer", "Regionaler", Orientierungspunkt für unternehmerische Strategien werden? Dieser Frage geht das vorliegende Impulspapier nach. Dabei zeigt sich, dass es schon vielfältige Beispiele dafür gibt, dass Unternehmen "Suffizienz zum Business Case" praktizieren. Das Impulspapier bettet seine Überlegungen in die aktuelle Debatte zu nachhaltigen Ressourcenstrategien ein und zeigt auf, welche Beiträge eine aufgeklärte Managementforschung dazu leisten kann.

Beschreibung: Mit dem Kernenergieunfall im japanischen Fukushima im März 2011 ist die Diskussion über das Für und Wider der Nutzung der Kernenergie für die Stromerzeugung in Deutschland neu entbrannt. Die Frage nach den Auswirkungen eines beschleunigten Ausstiegs aus der Kernenergienutzung auf die Entwicklung der Strompreise in Deutschland bildete in den vergangenen Monaten einen Schwerpunkt der öffentlichen Diskussion. Allerdings halten nicht alle Aussagen, die hierzu veröffentlicht wurden, einer kritischen Analyse stand, was zum Teil auch an zugrunde liegenden politischen Motiven gelegen haben mag. Eine Untersuchung fundierter Studien und ausgewählter Stellungnahmen zeigt, dass sich die befürchteten kurzfristigen Preiseffekte in ü̈berschaubaren Grenzen halten werden.

Beschreibung: Um das vom Weltklimarat (IPCC) geforderte 2°C-Ziel einhalten zu können, ist eine Reduktion der globalen CO2-Emissionen um 80% bis 2050 gegenüber dem Stand von 1990 zwingend notwendig. Hierbei wird auch solarthermischen Kraftwerken eine immer größere Bedeutung beigemessen. Im BLUE Map-Szenario der Internationalen Energieagentur (IEA), das von einer CO2-Reduktion um 50% bis 2050 gegenüber 2005 ausgeht, müssen im Jahr 2050 ca. 11% (4.754 TWh) des weltweiten Strombedarfs durch Sonnenenergie gedeckt werden (IEA 2008). Neben Photovoltaik sollen solarthermische Kraftwerke (Concentrated Solar Power, CSP) etwa 46% (ca. 2.200 TWh) der prognostizierten Menge an Solarstrom erzeugen. Im Energy[R]evolution Szenario von Greenpeace International und EREC (European Renewable Energy Council) aus dem Jahr 2008 werden rund 6.000 TWh an CSP-Strom im Jahr 2050 angenommen (bei einer installierten Leistung von 801 GW), während andere Studien bis zu 1.000 GW installierter Leistung in 2050 betrachten (Viebahn et al. 2010). Die DESERTEC-Initiative gibt ein Ziel von 5.000 GW installierter Leistung im Jahr 2050 vor. Der Export von CSP-Technologien in die "Sunbelt"-Regionen bietet große Chancen für deutsche Anlagenbauer. So sind u.a. Schott Solar, die Ferrostaal Group mit ihrem Geschäftssegment "Solar Energy", Flagsol, die Solar Power Group, Solar Millenium und Fichtner Solar auf dem Gebiet CSP aktiv. Schott Solar (Receiver) und Flabeg (Spiegel) haben eine weltweit führende Markstellung inne. Große deutsche Energieversorger und Anlagenbauer wie E.On, RWE und Siemens gehören zum Industriekonsortium der Desertec Industrial Initiative, die den Ausbau von CSP in der MENA-Region vorantreiben will. Die Initiative wurde von der Münchener Rück angestoßen. In diesem Artikel wird dargestellt, welche Aktivitäten deutsche Unternehmen entlang der Wertschöpfungskette bislang aufweisen und wie ihre Marktstellung im Vergleich zu führenden internationalen Unternehmen zu bewerten ist. Anschließend wird auf Basis von vorliegenden Energieszenarien ermittelt, welche messbaren ökonomischen Effekte für deutsche Unternehmen, z.B. zusätzliche Wertschöpfung und die Schaffung neuer Arbeitsplätze, aus den genannen Potentialen resultieren. Die Ergebnisse basieren auf einer Studie des Wuppertal Instituts, die im Auftrag von Greenpeace Deutschland und der DESERTEC Foundation erstellt wurde.

Beschreibung: Der Klimawandel hat Einfluss auf zahlreiche Lebensbereiche des Menschen; darunter auch auf die Bereitstellung und Organisation von Energie. Bereits heute lassen sich für verschiedene Prozessstufen und Energiesysteme Auswirkungen der Veränderung des Klimas beobachten. Langanhaltende Hitzeperioden erhöhen die Nachfrage nach Elektrizität für Kühlungsgeräte und schränken gleichzeitig die Bereitstellung von Elektrizität ein, da Kühlwasser nicht in ausreichender Menge und Temperatur zur Verfügung steht. Häufigere Unwetter und Überschwemmungen gefährden Anlagen und Transportwege. Diese und weitere Einflüsse werden zukünftig zunehmen und durch neue ergänzt, so dass die Energiewirtschaft vor einer neuen Herausforderung steht. Entlang der Prozesskette der Energiebereitstellung wird gezeigt, welche Stufen gegenüber den Auswirkungen des Klimawandels verwundbar sind. Anhand von Anpassungsoptionen wird zudem dargestellt, wie resiliente Energiesysteme aufgebaut werden können, die gegenüber Klimaänderungen widerstandsfähig sind.

Beschreibung: Author(s): Anne-Florence Bitbol and Jean-Baptiste Fournier We investigate the forces exerted on embedded inclusions by a fluid medium with long-range correlations, described by an effective scalar field theory. Such forces are the basis for the medium-mediated Casimir-like force. To study these forces beyond thermal average, it is necessary to define them i... [Phys. Rev. E 83, 061107] Published Wed Jun 08, 2011

Beschreibung: Author(s): Onuttom Narayan An exact expression for the finite frequency response of open classical systems coupled to reservoirs is obtained. The result is valid for any conserved current. No assumption is made about the reservoirs apart from thermodynamic equilibrium. At nonzero frequencies, the expression involves correlati... [Phys. Rev. E 83, 061110] Published Fri Jun 10, 2011

Beschreibung: Author(s): Irina Bashkirtseva and Lev Ryashko We study excitability phenomena for the stochastically forced FitzHugh-Nagumo system modeling a neural activity. Noise-induced changes in the dynamics of this model can be explained by the high stochastic sensitivity of its attractors. Computational methods based on the stochastic sensitivity functi... [Phys. Rev. E 83, 061109] Published Fri Jun 10, 2011

Beschreibung: Author(s): T. Koide and T. Kodama We extend the stochastic energetics to a relativistic system. The thermodynamic laws and equipartition theorem are discussed for a relativistic Brownian particle and the first and the second law of thermodynamics in this formalism are derived. The relation between the relativistic equipartition rela... [Phys. Rev. E 83, 061111] Published Fri Jun 10, 2011

Beschreibung: Author(s): K. Górska and K. A. Penson We investigate functions g ( α , β ; x ) which are heavy-tailed Lévy stable probability distributions of index 0〈 α ⩽2 and appropriate asymmetry parameter β . They are of central importance in physics of amorphous and disordered systems, econophysics, geology, hydrology, internet traffic, dynamics of human... [Phys. Rev. E 83, 061125] Published Thu Jun 16, 2011

Beschreibung: Author(s): R. Erichsen, Jr. and W. K. Theumann The statistical mechanics of a two-state Ising spin-glass model with finite random connectivity, in which each site is connected to a finite number of other sites, is extended in this work within the replica technique to study the phase transitions in the three-state Ghatak-Sherrington (or random Bl... [Phys. Rev. E 83, 061126] Published Thu Jun 16, 2011

Beschreibung: Author(s): D. Girardi and N. S. Branco We study the Potts model on a rectangular lattice with aperiodic modulations in its interactions along one direction. Numerical results are obtained using the Wolff algorithm and for many lattice sizes, allowing for a finite-size scaling analyses to be carried out. Three different self-dual aperiodi... [Phys. Rev. E 83, 061127] Published Thu Jun 16, 2011

Beschreibung: Author(s): R. Mankin, K. Laas, and A. Sauga The temporal behavior of the mean-square displacement and the velocity autocorrelation function of a particle subjected to a periodic force in a harmonic potential well is investigated for viscoelastic media using the generalized Langevin equation. The interaction with fluctuations of environmental ... [Phys. Rev. E 83, 061131] Published Mon Jun 20, 2011

Beschreibung: Author(s): Jörg Menche, Angelo Valleriani, and Reinhard Lipowsky Using the generic example of Ising spins on scale-free networks, we demonstrate that degree-degree correlations can induce a large number of thermodynamically stable states in networks that otherwise exhibit only the two completely ordered states. The additional stable states are related to the laye... [Phys. Rev. E 83, 061129] Published Mon Jun 20, 2011

Beschreibung: Author(s): Wipsar Sunu Brams Dwandaru and Matthias Schmidt We show that classical density functional theory can be based on the constrained search method [ M. Levy, Proc. Natl. Acad. Sci. USA 76 , 6062 (1979) ]. From the Gibbs inequality one first derives a variational principle for the grand potential as a functional of a trial many-body distribution. This fu... [Phys. Rev. E 83, 061133] Published Wed Jun 22, 2011

Beschreibung: Author(s): Miroslav Grmela, Georgy Lebon, and Charles Dubois Heat transfer is investigated on three levels of description: Fourier, Cattaneo, and Peierls. The microscopic nature of the heat that becomes important, in particular in nanoscale systems, is characterized by a vector field related to the heat flux on the Cattaneo level and by the phonon distributio... [Phys. Rev. E 83, 061134] Published Wed Jun 22, 2011

Beschreibung: Author(s): Joachim Rambeau and Grégory Schehr We study the extreme statistics of N nonintersecting Brownian motions (vicious walkers) over a unit time interval in one dimension. Using path-integral techniques we compute exactly the joint distribution of the maximum M and of the time τ M at which this maximum is reached. We focus in particular on... [Phys. Rev. E 83, 061146] Published Fri Jun 24, 2011

Beschreibung: Author(s): Chulan Kwon, Jae Dong Noh, and Hyunggyu Park We present the theoretical study on nonequilibrium (NEQ) fluctuations for diffusion dynamics in high dimensions driven by a linear drift force. We consider a general situation in which NEQ is caused by two conditions: (i) drift force not derivable from a potential function, and (ii) diffusion matrix... [Phys. Rev. E 83, 061145] Published Fri Jun 24, 2011

Beschreibung: Author(s): Hiroki Tutu Stochastic resonance (SR) enhanced by time-delayed feedback control is studied. The system in the absence of control is described by a Langevin equation for a bistable system, and possesses a usual SR response. The control with the feedback loop, the delay time of which equals to one-half of the per... [Phys. Rev. E 83, 061106] Published Tue Jun 07, 2011

Beschreibung: Author(s): S. M. Cotes and E. V. Albano In this work, we present the results of a systematic exploration of the effect caused by the introduction of nonmagnetic impurities (or defects) on the stabilization of the interface between two magnetic domains of opposite magnetic orientation. Those defects are simulated as spin vacancies along th... [Phys. Rev. E 83, 061105] Published Mon Jun 06, 2011

Beschreibung: Author(s): Seung Ki Baek, Harri Mäkelä, Petter Minnhagen, and Beom Jun Kim The value of the internal energy per spin is independent of the strip width for a certain class of spin systems on two-dimensional infinite strips. It is verified that the Ising model on the kagome lattice belongs to this class through an exact transfer-matrix calculation of the internal energy for ... [Phys. Rev. E 83, 061104] Published Mon Jun 06, 2011

Beschreibung: Author(s): R. B. Stinchcombe and S. L. A. de Queiroz We consider the one-dimensional totally asymmetric simple exclusion process (TASEP) with position-dependent hopping rates. The problem is solved, in a mean-field adiabatic approximation, for a general (smooth) form of spatial rate variation. Numerical simulations of systems with hopping rates varyin... [Phys. Rev. E 83, 061113] Published Mon Jun 13, 2011

Beschreibung: Author(s): M. A. Marchiori and M. A. M. de Aguiar We study the flow of energy between a harmonic oscillator (HO) and an external environment consisting of N two-degrees-of-freedom nonlinear oscillators, ranging from integrable to chaotic according to a control parameter. The coupling between the HO and the environment is bilinear in the coordinates... [Phys. Rev. E 83, 061112] Published Mon Jun 13, 2011

Beschreibung: Author(s): C. von Ferber, R. Folk, Yu. Holovatch, R. Kenna, and V. Palchykov We analyze the entropic equation of state for a many-particle interacting system in a scale-free network. The analysis is performed in terms of scaling functions, which are of fundamental interest in the theory of critical phenomena and have previously been theoretically and experimentally explored ... [Phys. Rev. E 83, 061114] Published Mon Jun 13, 2011

Beschreibung: Author(s): Adam Lipowski and Dorota Lipowska Using Monte Carlo simulations we examine the diffusive properties of the greedy algorithm in the d -dimensional traveling salesman problem. Our results show that for d =3 and 4 the average squared distance from the origin 〈 r 2 〉 is proportional to the number of steps t . In the d =2 case such a scaling is... [Phys. Rev. E 83, 061115] Published Mon Jun 13, 2011

Beschreibung: Author(s): Chenggui Yao, Yan Liu, and Meng Zhan The dynamics in an overdamped bistable system subject to the action of two periodic forces (assuming their frequencies are ω and Ω , and amplitudes are A and B , respectively) is studied. For the usual vibrational resonance, the nonmonotonic dependence of signal output of the low frequency ω on the ch... [Phys. Rev. E 83, 061122] Published Thu Jun 16, 2011

Beschreibung: Author(s): Asim Ghosh, Urna Basu, Anirban Chakraborti, and Bikas K. Chakrabarti We study an ideal-gas-like model where the particles exchange energy stochastically, through energy-conserving scattering processes, which take place if and only if at least one of the two particles has energy below a certain energy threshold (interactions are initiated by such low-energy particles)... [Phys. Rev. E 83, 061130] Published Mon Jun 20, 2011

Beschreibung: Author(s): Tsampikos Kottos and Boris Shapiro Thermalization of systems described by the discrete nonlinear Schrödinger equation, in the strong disorder limit, is investigated both theoretically and numerically. We show that introducing correlations in the disorder potential, while keeping the “effective” disorder fixed (as measured by the loca... [Phys. Rev. E 83, 062103] Published Wed Jun 22, 2011

Beschreibung: Author(s): Hui-yi Tang and Yong-li Ma Within an exact microcanonical (MC) ensemble, we study the nonanalyticities of thermodynamic functions research in finite noninteracting Bose gases in traps. The results show that there exists a rich oscillatory behavior of MC thermodynamical quantities as a function of a system’s total energy E (e.... [Phys. Rev. E 83, 061135] Published Thu Jun 23, 2011

Beschreibung: Author(s): Lobisor Kurbah and Prabodh Shukla We study hysteresis in antiferromagnetic random-field Ising model at zero temperature. The external field is cycled adiabatically between - ∞ and ∞ . Two different distributions of the random field are considered: (i) a uniform distribution of width 2 Δ centered at the origin and (ii) a Gaussian distri... [Phys. Rev. E 83, 061136] Published Thu Jun 23, 2011

Beschreibung: Author(s): Kay Jörg Wiese, Satya N. Majumdar, and Alberto Rosso Fractional Brownian motion is a Gaussian process x ( t ) with zero mean and two-time correlations 〈 x ( t 1 ) x ( t 2 )〉= D ( t 1 2 H + t 2 2 H -| t 1 - t 2 | 2 H ) , where H , with 0〈 H 〈1 , is called the Hurst exponent. For H =1/2 , x ( t ) is a Brownian motion, while for H ≠1/2 , x ( t ) is a non-Markovian process. Here we study x ( t ) in p... [Phys. Rev. E 83, 061141] Published Fri Jun 24, 2011

Beschreibung: Author(s): Huijun Jiang, Tiejun Xiao, and Zhonghuai Hou We discuss stochastic thermodynamics (ST) for delayed Langevin systems in this paper. By using the general principles of ST, the first-law-like energy balance and trajectory-dependent entropy s ( t ) can be well defined in a way that is similar to that in a system without delay. Because the presence of... [Phys. Rev. E 83, 061144] Published Fri Jun 24, 2011

Beschreibung: Author(s): M. Ostilli, A. L. Ferreira, and J. F. F. Mendes We analyze critical phenomena on networks generated as the union of hidden variable models (networks with any desired degree sequence) with arbitrary graphs. The resulting networks are general small worlds similar to those à la Watts and Strogatz, but with a heterogeneous degree distribution. We pro... [Phys. Rev. E 83, 061149] Published Tue Jun 28, 2011

Beschreibung: Author(s): Ning Jia and Shoufeng Ma The characteristics of the deterministic Nagel–Schreckenberg model with traffic-light boundary conditions are investigated and elucidated in a mostly theoretically way. First, precise analytical results of the outflow are obtained for cases in which the duration of the red phase is longer than one s... [Phys. Rev. E 83, 061150] Published Tue Jun 28, 2011

Beschreibung: Author(s): Alexander Dobrinevski, Pierre Le Doussal, and Kay Jörg Wiese We consider a particle in one dimension submitted to amplitude and phase disorder. It can be mapped onto the complex Burgers equation, and provides a toy model for problems with interplay of interferences and disorder, such as the Nguyen-Spivak-Shklovskii model of hopping conductivity in disordered ... [Phys. Rev. E 83, 061116] Published Tue Jun 14, 2011

Beschreibung: Author(s): Denis S. Grebenkov The characterization of a stochastic process from its single random realization is a challenging problem for most single-particle tracking techniques which survey an individual trajectory of a tracer in a complex or viscoelastic medium. We consider two quadratic functionals of the trajectory: the ti... [Phys. Rev. E 83, 061117] Published Tue Jun 14, 2011

Beschreibung: Author(s): Karol A. Penson and Karol Życzkowski Squared singular values of a product of s square random Ginibre matrices are asymptotically characterized by probability distributions P s ( x ) , such that their moments are equal to the Fuss–Catalan numbers of order s . We find a representation of the Fuss-Catalan distributions P s ( x ) in terms of a combi... [Phys. Rev. E 83, 061118] Published Wed Jun 15, 2011

Beschreibung: Author(s): Samir Suweis, Amilcare Porporato, Andrea Rinaldo, and Amos Maritan Generalized Langevin equations (GLE) with multiplicative white Poisson noise pose the usual prescription dilemma leading to different evolution equations (master equations) for the probability distribution. Contrary to the case of multiplicative Gaussian white noise, the Stratonovich prescription do... [Phys. Rev. E 83, 061119] Published Wed Jun 15, 2011

Beschreibung: Author(s): Suriyanarayanan Vaikuntanathan and Christopher Jarzynski Following recent work by Marathe and Parrondo [Phys. Rev. Lett. 104 , 245704 (2010)] , we construct a classical Hamiltonian system whose energy is reduced during the adiabatic cycling of external parameters when initial conditions are sampled microcanonically. Combining our system with a device that m... [Phys. Rev. E 83, 061120] Published Wed Jun 15, 2011

Beschreibung: Author(s): Tomoshige Miyaguchi and Takuma Akimoto We investigate continuous time random walks with truncated α -stable trapping times. We prove distributional ergodicity for a class of observables; namely, the time-averaged observables follow the probability density function called the Mittag-Leffler distribution. This distributional ergodic behavio... [Phys. Rev. E 83, 062101] Published Wed Jun 15, 2011

Beschreibung: Author(s): Lei Wang (王雷) and Baowen Li (李保文) Two-dimensional asymmetrical Ising models consisting of two weakly coupled dissimilar segments, coupled to heat baths with different temperatures at the two ends, are studied by Monte Carlo simulations. The heat rectifying effect, namely asymmetric heat conduction, is clearly observed. The underlyin... [Phys. Rev. E 83, 061128] Published Fri Jun 17, 2011

Beschreibung: Author(s): L. Giuggioli, J. R. Potts, and S. Harris Inspired by the collective phenomenon of territorial emergence, whereby animals move and interact through the scent marks they deposit, we study the dynamics of a 1D Brownian walker in a random environment consisting of confining boundaries that are themselves diffusing anomalously. We show how to r... [Phys. Rev. E 83, 061138] Published Thu Jun 23, 2011

Beschreibung: Author(s): E. J. G. G. Vidal, R. P. A Lima, and M. L. Lyra In this work, we provide exact solutions for the ideal boson lattice gas on the infinitely ramified star and wheel graphs. Within a tight-binding description, we show that Bose-Einstein condensation (BEC) takes place at a finite temperature after a proper rescaling of the hoping integral ɛ connectin... [Phys. Rev. E 83, 061137] Published Thu Jun 23, 2011

Beschreibung: Author(s): A. Fuliński Ergodic behavior of the class of G processes G ( t )=∫ t m t du   K ( t , u ) ξ ( u )-∫ t m 0 du   K (0, u ) ξ ( u ) , 〈 ξ ( t )〉=0 , 〈 ξ ( t ) ξ ( s )〉= ϕ (| t - s |) is examined. Ergodicproperties are only G extensions of normal diffusion ( K =1 ) and of Mandelbrot-Van Ness fractional diffusion [ K ( t , u )= K ( t - u ) , t m →- ∞ ]. Any deviation from these two typ... [Phys. Rev. E 83, 061140] Published Fri Jun 24, 2011

Beschreibung: Author(s): Ariel Balter and Alexandre M. Tartakovsky We describe a new, microscopic model for diffusion that captures diffusion induced fluctuations at scales where the concept of concentration gives way to discrete particles. We show that in the limit as the number of particles N → ∞ , our model is equivalent to the classical stochastic diffusion equati... [Phys. Rev. E 83, 061143] Published Fri Jun 24, 2011

Beschreibung: Author(s): A. Rebei The simultaneous effect of thermal noise and time-periodic spin torques on magnetic multilayers are treated in this work. Using two commonly studied magnetic systems with multiple stable states at zero temperature as examples, we show that periodic spin torques can enhance the stability of the syste... [Phys. Rev. E 83, 061148] Published Mon Jun 27, 2011

Beschreibung: Author(s): Peng Li and Beike Jia We propose a mesoscopic particle-exchange heat engine realized via coupled quantum dots. The engine is able to extract work from a bosonic reservoir and can be used as a refrigerator. The electric current is derived from a master-equation method and is readdressed under a thermodynamic context. The ... [Phys. Rev. E 83, 062104] Published Mon Jun 27, 2011

Beschreibung: Author(s): H. Dong (董辉), D. Z. Xu (徐大智), C. Y. Cai (蔡承韵), and C. P. Sun (孙昌璞) We study the physical mechanism of Maxwell’s demon (MD), which helps do extra work in thermodynamic cycles with the heat engine. This is exemplified with one molecule confined in an infinitely deep square potential with a movable solid wall. The MD is modeled as a two-level system (TLS) for measurin... [Phys. Rev. E 83, 061108] Published Wed Jun 08, 2011

Beschreibung: Author(s): S. Saikia, A. M. Jayannavar, and Mangal C. Mahato The phenomenon of stochastic resonance (SR) is known to occur mostly in bistable systems. However, the question of the occurrence of SR in periodic potential systems has not been resolved conclusively. Our present numerical work shows that the periodic potential system indeed exhibits SR in the high... [Phys. Rev. E 83, 061121] Published Thu Jun 16, 2011

Beschreibung: Author(s): Oliver Mülken and Maximilian Bauer We study the coherent dynamics of excitations on vibrating chains. By applying an external field and matching the field strength with the oscillation frequency of the chain it is possible to obtain an (average) transport of an initial Gaussian wave packet. We distinguish between a uniform oscillatio... [Phys. Rev. E 83, 061123] Published Thu Jun 16, 2011

Beschreibung: Author(s): Marco Picco and Raoul Santachiara We report on the numerical measures on different spin interfaces and Fortuin-Kasteleyn (FK) cluster boundaries in the Askhin-Teller (AT) model. For a general point on the AT critical line, we find that the fractal dimension of a generic spin cluster interface can take one of four different possible ... [Phys. Rev. E 83, 061124] Published Thu Jun 16, 2011

Beschreibung: Author(s): A. V. Plyukhin It is known that in the regime of superlinear diffusion, characterized by zero integral friction (vanishing integral of the memory function), the generalized Langevin equation may have nonergodic solutions that do not relax to equilibrium values. It is shown that the equation may have nonergodic (no... [Phys. Rev. E 83, 062102] Published Thu Jun 16, 2011

Beschreibung: Author(s): R. Bachelard, T. Dauxois, G. De Ninno, S. Ruffo, and F. Staniscia We show that, in the continuum limit, the dynamics of Hamiltonian systems defined on a lattice with long-range couplings is well described by the Vlasov equation. This equation can be linearized around the homogeneous state, and a dispersion relation, which depends explicitly on the Fourier modes of... [Phys. Rev. E 83, 061132] Published Tue Jun 21, 2011

Beschreibung: Author(s): Paul C. Bressloff and Jay M. Newby We use perturbation methods to analyze a two-dimensional random intermittent search process, in which a searcher alternates between a diffusive search phase and a ballistic movement phase whose velocity direction is random. A hidden target is introduced within a rectangular domain with reflecting bo... [Phys. Rev. E 83, 061139] Published Fri Jun 24, 2011

Beschreibung: Author(s): Malgorzata Turalska, Bruce J. West, and Paolo Grigolini We study a decision making model in a condition where it is equivalent to the two-dimensional Ising model, and we show that at the onset of phase transition it generates temporal complexity, namely, nonstationary and nonergodic fluctuations. We argue that this is a general property of criticality, t... [Phys. Rev. E 83, 061142] Published Fri Jun 24, 2011

Beschreibung: Author(s): T. S. Biró and P. Ván One criticism among others of Nonextensive thermodynamics is criticized by the statement that the zeroth law cannot be satisfied with nonadditive composition rules. In this paper we determine the general functional form of those nonadditive composition rules that are compatible with the zeroth law o... [Phys. Rev. E 83, 061147] Published Mon Jun 27, 2011

Beschreibung: Author(s): Luca Faes, Giandomenico Nollo, and Alberto Porta We present an approach, framed in information theory, to assess nonlinear causality between the subsystems of a whole stochastic or deterministic dynamical system. The approach follows a sequential procedure for nonuniform embedding of multivariate time series, whereby embedding vectors are built pr... [Phys. Rev. E 83, 051112] Published Wed May 11, 2011

Beschreibung: Author(s): Lian-Ao Wu and Dvira Segal We develop a Born-Oppenheimer-type formalism for the description of quantum thermal transport across hybrid nanoscale objects. Our formalism is suitable for treating heat transfer in the off-resonant regime, where, e.g., the relevant vibrational modes of the interlocated molecule are high relative t... [Phys. Rev. E 83, 051114] Published Thu May 12, 2011

Beschreibung: Author(s): Igor V. Ovchinnikov Here, a scenario is proposed, according to which a generic self-organized critical (SOC) system can be looked upon as a Witten-type topological field theory (W-TFT) with spontaneously broken Becchi-Rouet-Stora-Tyutin (BRST) symmetry. One of the conditions for the SOC is the slow driving noise, which... [Phys. Rev. E 83, 051129] Published Wed May 25, 2011

Beschreibung: Author(s): Chikashi Arita and Andreas Schadschneider Recently, the stationary state of a parallel-update totally asymmetric simple exclusion process with varying system length, which can be regarded as a queueing process with excluded-volume effect (exclusive queueing process), was obtained [ C Arita and D Yanagisawa, J. Stat. Phys. 141 , 829 (2010) ]. I... [Phys. Rev. E 83, 051128] Published Wed May 25, 2011

Beschreibung: Author(s): Yu. I. Dublenych We consider a lattice and structures on it generated by a set of configurations of a cluster. Using some general considerations, we show that there exist linear relations between fractional contents of these configurations in the structures. Such relations can be useful for the determination of the ... [Phys. Rev. E 83, 022101] Published Wed Feb 23, 2011

Beschreibung: Author(s): J. S. Lee and B. Kahng We study the distribution of voltage drops across bonds in dielectric breakdown networks and its qth moments in the two-dimensional Euclidean space. Performing numerical simulations, we find that the distribution is composed of three different power-law regimes which are distinguished by two crossov... [Phys. Rev. E 83, 052103] Published Thu May 05, 2011

Beschreibung: Author(s): N. Hasselmann and F. L. Braghin We investigate the properties of crystalline phantom membranes, at the crumpling transition and in the flat phase, using a nonperturbative renormalization group approach. We avoid a derivative expansion of the effective average action and instead analyze the full momentum dependence of the elastic c... [Phys. Rev. E 83, 031137] Published Thu Mar 31, 2011

Beschreibung: Author(s): Stefano Lepri and Antonio Politi We numerically solve a discretized model of Lévy random walks on a finite one-dimensional domain with a reflection coefficient r and in the presence of sources. At the domain boundaries, the steady-state density profile is nonanalytic. The meniscus exponent μ, introduced to characterize this singu... [Phys. Rev. E 83, 030107] Published Thu Mar 31, 2011

Beschreibung: Author(s): Luigi Palatella and Cecilia Pennetta We present an analytical expression for the first return time (FRT) probability density function of a stationary correlated signal. Precisely, we start by considering a stationary discrete-time Ornstein-Uhlenbeck (OU) process with exponential decaying correlation function. The first return time dist... [Phys. Rev. E 83, 041102] Published Fri Apr 01, 2011

Beschreibung: Author(s): Bao-quan Ai, Ya-feng He, and Wei-rong Zhong Transport of Brownian particles interacting with each other via the Morse potential is investigated in the presence of an ac driving force applied locally at one end of the chain. By using numerical simulations, we find that the system can behave as a particle diode for both overdamped and underdamp... [Phys. Rev. E 83, 051106] Published Wed May 04, 2011