http://pre.aps.org/ Recently published articles in Phys. Rev. E in the Table of Content section "Statistical physics" en-us Copyright (c) 2008 The American Physical Society 2008-05-07T08:07:18-04:00 assocpub@aps.org rss@aps.org hourly 4 2008-05-07T08:07:18-04:00 rss@aps.org http://link.aps.org/doi/10.1103/PhysRevE.77.051103 Author(s): James F. Lutsko and Jean Pierre Boon<br/>The Fokker-Planck equation for the probability f(r,t) to find a random walker at position r at time t is derived for the case that the probability to make jumps depends nonlinearly on f(r,t) . The result is a generalized form of the classical Fokker-Planck equation where the effects of drift, due to...<br/>[Phys. Rev. E 77, 051103] Published Mon May 05, 2008 James F. Lutsko and Jean Pierre Boon 2008-05-05T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.051103 Phys. Rev. E 77, 051103 text/html article Physical Review E 77 5 2008-05-05T00:00:00-04:00 051103 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.051102 Author(s): Tathiana Moreira, Giancarlo Q. Pellegrino, J. G. Peixoto de Faria, M. C. Nemes, F. Camargo, and A. F. R. de Toledo Piza<br/>We propose a schematic model to study the formation of excitons in bilayer electron systems. The phase transition is signalized both in the quantum and classical versions of the model. In the present contribution we show that not only the quantum ground state but also higher energy states, up to the...<br/>[Phys. Rev. E 77, 051102] Published Mon May 05, 2008 Tathiana Moreira, Giancarlo Q. Pellegrino, J. G. Peixoto de Faria, M. C. Nemes, F. Camargo, and A. F. R. de Toledo Piza 2008-05-05T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.051102 Phys. Rev. E 77, 051102 text/html article Physical Review E 77 5 2008-05-05T00:00:00-04:00 051102 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.051101 Author(s): G. Nicolis and C. Nicolis<br/>Conditions under which the evolution equations of a multivariate system can be cast in a variational form are identified. A kinetic potential generating both the deterministic part of the evolution and the probabilistic properties in a suitably defined set of variables is derived and compared to the...<br/>[Phys. Rev. E 77, 051101] Published Mon May 05, 2008 G. Nicolis and C. Nicolis 2008-05-05T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.051101 Phys. Rev. E 77, 051101 text/html article Physical Review E 77 5 2008-05-05T00:00:00-04:00 051101 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041130 Author(s): V. S. Poghosyan, V. B. Priezzhev, and P. Ruelle<br/>Following the recent proposal made by [J. Bouttier , Phys. Rev. E 76, 041140 (2007)], we study analytically the mobility properties of a single vacancy in the close-packed dimer model on the square lattice. Using the spanning web representation, we find determinantal expressions for various observab...<br/>[Phys. Rev. E 77, 041130] Published Wed Apr 30, 2008 V. S. Poghosyan, V. B. Priezzhev, and P. Ruelle 2008-04-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041130 Phys. Rev. E 77, 041130 text/html article Physical Review E 77 4 2008-04-30T00:00:00-04:00 041130 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041129 Author(s): Punyabrata Pradhan, Yariv Kafri, and Dov Levine<br/>We study two nonequilibrium work fluctuation theorems, the Crooks theorem and the Jarzynski equality, for a test system coupled to a spatially extended heat reservoir whose degrees of freedom are explicitly modeled. The sufficient conditions for the validity of the theorems are discussed in detail a...<br/>[Phys. Rev. E 77, 041129] Published Wed Apr 30, 2008 Punyabrata Pradhan, Yariv Kafri, and Dov Levine 2008-04-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041129 Phys. Rev. E 77, 041129 text/html article Physical Review E 77 4 2008-04-30T00:00:00-04:00 041129 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041128 Author(s): Rui Jiang, Mao-Bin Hu, Yong-Hong Wu, and Qing-Song Wu<br/>This paper studies a two-lane totally asymmetric simple exclusion process, in which particles could jump between the two lanes with asymmetric rates. In the weak coupling situation, the rates are inversely proportional to system size L . The appearance of localized shock in one lane and the disconti...<br/>[Phys. Rev. E 77, 041128] Published Tue Apr 29, 2008 Rui Jiang, Mao-Bin Hu, Yong-Hong Wu, and Qing-Song Wu 2008-04-29T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041128 Phys. Rev. E 77, 041128 text/html article Physical Review E 77 4 2008-04-29T00:00:00-04:00 041128 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041127 Author(s): B. Jiménez de Cisneros and A. Calvo Hernández<br/>Full analytical models of heat engines and refrigerators in linear irreversible thermodynamics can be defined by means of a chain of coupled heat devices. In this way it is possible to derive results and techniques of finite-time thermodynamics, like endoreversible efficiencies and the usual models ...<br/>[Phys. Rev. E 77, 041127] Published Tue Apr 29, 2008 B. Jiménez de Cisneros and A. Calvo Hernández 2008-04-29T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041127 Phys. Rev. E 77, 041127 text/html article Physical Review E 77 4 2008-04-29T00:00:00-04:00 041127 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041126 Author(s): Denis Lacroix<br/>The exact dynamics of a system coupled to an environment can be described by an integro-differential stochastic equation for the reduced density. The influence of the environment is incorporated through a mean field which is both stochastic and nonlocal in time and where the standard two-time correl...<br/>[Phys. Rev. E 77, 041126] Published Tue Apr 29, 2008 Denis Lacroix 2008-04-29T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041126 Phys. Rev. E 77, 041126 text/html article Physical Review E 77 4 2008-04-29T00:00:00-04:00 041126 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041125 Author(s): Carl D. Modes and Randall D. Kamien<br/>We examine a simple hard-disk fluid with no long-range interactions on the two-dimensional space of constant negative Gaussian curvature, the hyperbolic plane. This geometry provides a natural mechanism by which global crystalline order is frustrated, allowing us to construct a tractable, one-parame...<br/>[Phys. Rev. E 77, 041125] Published Mon Apr 28, 2008 Carl D. Modes and Randall D. Kamien 2008-04-28T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041125 Phys. Rev. E 77, 041125 text/html article Physical Review E 77 4 2008-04-28T00:00:00-04:00 041125 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041124 Author(s): Nuno Crokidakis and Fernando D. Nobre<br/>The effects of random magnetic fields are considered in an Ising spin-glass model defined in the limit of infinite-range interactions. The probability distribution for the random magnetic fields is a double Gaussian, which consists of two Gaussian distributions centered, respectively, at +H_{0} and ...<br/>[Phys. Rev. E 77, 041124] Published Fri Apr 25, 2008 Nuno Crokidakis and Fernando D. Nobre 2008-04-25T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041124 Phys. Rev. E 77, 041124 text/html article Physical Review E 77 4 2008-04-25T00:00:00-04:00 041124 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041123 Author(s): A. Gendiar, R. Krcmar, K. Ueda, and T. Nishino<br/>Two-dimensional ferromagnetic N -state clock models are studied on a hyperbolic lattice represented by tessellation of pentagons. The lattice lies on the hyperbolic plane with a constant negative scalar curvature. We observe the spontaneous magnetization, the internal energy, and the specific heat a...<br/>[Phys. Rev. E 77, 041123] Published Wed Apr 23, 2008 A. Gendiar, R. Krcmar, K. Ueda, and T. Nishino 2008-04-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041123 Phys. Rev. E 77, 041123 text/html article Physical Review E 77 4 2008-04-23T00:00:00-04:00 041123 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041122 Author(s): Sang-Gui Lee and Sang B. Lee<br/>The universality split in absorbing phase transition between the conserved lattice gas (CLG) model and the conserved threshold transfer process (CTTP) is investigated on a checkerboard fractal and on a Sierpinski gasket. The critical exponents θ , β , ν_{∥} , and z , which are associated with, ...<br/>[Phys. Rev. E 77, 041122] Published Wed Apr 23, 2008 Sang-Gui Lee and Sang B. Lee 2008-04-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041122 Phys. Rev. E 77, 041122 text/html article Physical Review E 77 4 2008-04-23T00:00:00-04:00 041122 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041121 Author(s): V. Sood, Tibor Antal, and S. Redner<br/>We study simple interacting particle systems on heterogeneous networks, including the voter model and the invasion process. These are both two-state models in which in an update event an individual changes state to agree with a neighbor. For the voter model, an individual “imports” its state fro...<br/>[Phys. Rev. E 77, 041121] Published Tue Apr 22, 2008 V. Sood, Tibor Antal, and S. Redner 2008-04-22T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041121 Phys. Rev. E 77, 041121 text/html article Physical Review E 77 4 2008-04-22T00:00:00-04:00 041121 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041120 Author(s): A. Fischer, K. H. Hoffmann, and P. Sibani<br/>We numerically simulate a thermalization process in an energy landscape with hierarchically organized metastable states. The initial configuration is chosen to have a large energy excess relative to the thermal equilibrium value at the running temperature. We show that the initial energy surplus is ...<br/>[Phys. Rev. E 77, 041120] Published Tue Apr 22, 2008 A. Fischer, K. H. Hoffmann, and P. Sibani 2008-04-22T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041120 Phys. Rev. E 77, 041120 text/html article Physical Review E 77 4 2008-04-22T00:00:00-04:00 041120 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.042102 Author(s): Jochen Bammert, Steffen Schreiber, and Walter Zimmermann<br/>We present a numerical investigation of the Brownian motion and diffusion of a dumbbell in a two-dimensional periodic potential. Its dynamics is described by a Langevin model including the hydrodynamic interaction. With increasing values of the amplitude of the potential we find along the modulated ...<br/>[Phys. Rev. E 77, 042102] Published Mon Apr 21, 2008 Jochen Bammert, Steffen Schreiber, and Walter Zimmermann 2008-04-21T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.042102 Phys. Rev. E 77, 042102 text/html article Physical Review E 77 4 2008-04-21T00:00:00-04:00 042102 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041119 Author(s): P. O. Kazinski<br/>A notion of stochastic deformation is introduced and the corresponding algebraic deformation procedure is developed. This procedure is analogous to the deformation of an algebra of observables like deformation quantization, but for an imaginary deformation parameter (the Planck constant). This metho...<br/>[Phys. Rev. E 77, 041119] Published Fri Apr 18, 2008 P. O. Kazinski 2008-04-18T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041119 Phys. Rev. E 77, 041119 text/html article Physical Review E 77 4 2008-04-18T00:00:00-04:00 041119 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041118 Author(s): Armen E. Allahverdyan, Ramandeep S. Johal, and Guenter Mahler<br/>We consider a class of quantum heat engines consisting of two subsystems interacting with a work-source and coupled to two separate baths at different temperatures T_{h} >T_{c} . The purpose of the engine is to extract work due to the temperature difference. Its dynamics is not restricted to the near...<br/>[Phys. Rev. E 77, 041118] Published Fri Apr 18, 2008 Armen E. Allahverdyan, Ramandeep S. Johal, and Guenter Mahler 2008-04-18T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041118 Phys. Rev. E 77, 041118 text/html article Physical Review E 77 4 2008-04-18T00:00:00-04:00 041118 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041117 Author(s): Paolo Visco, Frédéric van Wijland, and Emmanuel Trizac<br/>We investigate the probability distribution functions of the free flight time and of the number of collisions in a hard-sphere gas at equilibrium. At variance with naive expectation, the latter quantity does not follow Poissonian statistics, even in the dilute limit, which is the focus of the presen...<br/>[Phys. Rev. E 77, 041117] Published Fri Apr 18, 2008 Paolo Visco, Frédéric van Wijland, and Emmanuel Trizac 2008-04-18T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041117 Phys. Rev. E 77, 041117 text/html article Physical Review E 77 4 2008-04-18T00:00:00-04:00 041117 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041116 Author(s): Robert F. Berg, Michael R. Moldover, Minwu Yao, and Gregory A. Zimmerli<br/>We measured shear thinning, a viscosity decrease ordinarily associated with complex liquids, near the critical point of xenon. The data span a wide range of reduced shear rate: 10^{−3} <γ [over ̇] τ<700 , where γ [over ̇] τ is the shear rate scaled by the relaxation time τ of critical fluctuations. The measurements had a temperature resolution of 0.01 mK and were conducted in microgravity aboard the Space Shuttle Columbia to avoid the density stratification caused by Earth’s gravity. The viscometer measured the drag on a delicate nickel screen as it oscillated in the xenon at amplitudes 3 μm<x_{0} <430 μm and frequencies 1 Hz<ω/2π<5 Hz . To separate shear thinning from other nonlinearities, we computed the ratio of the viscous force on the screen at γ [over ̇] τ to the force at γ [over ̇] τ≈0 : C_{γ} ≡F(x_{0} ,ωτ,γ [over ̇] τ)/F(x_{0} ,ωτ,0) . At low frequencies, (ωτ)^{2} <γ [over ̇] τ , C_{γ} depends only on γ [over ̇] τ , as predicted by dynamic critical scaling. At high frequencies, (ωτ)^{2} >γ [over ̇] τ , C_{γ} depends also on both x_{0} and ω . The data were compared with numerical calculations b...<br/>[Phys. Rev. E 77, 041116] Published Thu Apr 17, 2008 Robert F. Berg, Michael R. Moldover, Minwu Yao, and Gregory A. Zimmerli 2008-04-17T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041116 Phys. Rev. E 77, 041116 text/html article Physical Review E 77 4 2008-04-17T00:00:00-04:00 041116 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041115 Author(s): A. Zoia<br/>We study the dynamics of a radioactive species flowing through a porous material, within the continuous-time random-walk (CTRW) approach to the modeling of stochastic transport processes. Emphasis is given to the case where radioactive decay is coupled to anomalous diffusion in locally heterogeneous...<br/>[Phys. Rev. E 77, 041115] Published Thu Apr 17, 2008 A. Zoia 2008-04-17T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041115 Phys. Rev. E 77, 041115 text/html article Physical Review E 77 4 2008-04-17T00:00:00-04:00 041115 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041114 Author(s): B. Waclaw and Z. Burda<br/>Using a field-theoretical representation of the Tanaka-Edwards integral, we develop a method to systematically compute the number N_{s} of one-spin stable states (local energy minima) of a glassy Ising system with nearest-neighbor interactions and random Gaussian couplings on an arbitrary graph. In ...<br/>[Phys. Rev. E 77, 041114] Published Thu Apr 17, 2008 B. Waclaw and Z. Burda 2008-04-17T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041114 Phys. Rev. E 77, 041114 text/html article Physical Review E 77 4 2008-04-17T00:00:00-04:00 041114 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041113 Author(s): Maicon S. Faria, N. S. Branco, and M. H. R. Tragtenberg<br/>We study the spin-1/2 Ising model on a Bethe lattice in the mean-field limit, with the interaction constants following one of two deterministic aperiodic sequences, the Fibonacci or period-doubling one. New algorithms of sequence generation were implemented, which were fundamental in obtaining long ...<br/>[Phys. Rev. E 77, 041113] Published Thu Apr 17, 2008 Maicon S. Faria, N. S. Branco, and M. H. R. Tragtenberg 2008-04-17T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041113 Phys. Rev. E 77, 041113 text/html article Physical Review E 77 4 2008-04-17T00:00:00-04:00 041113 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041112 Author(s): Daniel P. Snowman<br/>The current investigation probes frustration that arises in a Blume-Emery-Griffiths system due to competing biquadratic (±K) interactions while uniform bilinear and crystal-field interactions are maintained. This competition directly affects the clustering and density of nonmagnetic impurities. All...<br/>[Phys. Rev. E 77, 041112] Published Tue Apr 15, 2008 Daniel P. Snowman 2008-04-15T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041112 Phys. Rev. E 77, 041112 text/html article Physical Review E 77 4 2008-04-15T00:00:00-04:00 041112 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041111 Author(s): Peng Han and Chujun Zheng<br/>We investigate the effects of structural periodicity on wave localization in one-dimensional periodic-on-average disordered systems and derive two relations from the properties of the spectral periodicity and symmetry of the underlying periodic systems. These two relations predict equal localization...<br/>[Phys. Rev. E 77, 041111] Published Tue Apr 15, 2008 Peng Han and Chujun Zheng 2008-04-15T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041111 Phys. Rev. E 77, 041111 text/html article Physical Review E 77 4 2008-04-15T00:00:00-04:00 041111 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041110 Author(s): Shiqi Zhou<br/>A recently proposed numerical third-order thermodynamic perturbation theory (TPT) is extended to its fifth-order counterpart. Extensive performance evaluation based on several model potentials indicates that the fifth-order version is generally superior to both the third-order version and a well-kno...<br/>[Phys. Rev. E 77, 041110] Published Mon Apr 14, 2008 Shiqi Zhou 2008-04-14T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041110 Phys. Rev. E 77, 041110 text/html article Physical Review E 77 4 2008-04-14T00:00:00-04:00 041110 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041109 Author(s): A. Nußbaumer, E. Bittner, and W. Janke<br/>In 2003 Biskup [Commun. Math. Phys. 242, 137 (2003)] gave a rigorous proof for the behavior of equilibrium droplets in the two-dimensional (2D) spin-1/2 Ising model (or, equivalently, a lattice gas of particles) on a finite square lattice of volume V with a given excess δM≡M−M_{0} of magnetizat...<br/>[Phys. Rev. E 77, 041109] Published Mon Apr 14, 2008 A. Nußbaumer, E. Bittner, and W. Janke 2008-04-14T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041109 Phys. Rev. E 77, 041109 text/html article Physical Review E 77 4 2008-04-14T00:00:00-04:00 041109 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041108 Author(s): David S. Dean and Satya N. Majumdar<br/>We compute exact asymptotic results for the probability of the occurrence of large deviations of the largest (smallest) eigenvalue of random matrices belonging to the Gaussian orthogonal, unitary, and symplectic ensembles. In particular, we show that the probability that all the eigenvalues of an (N...<br/>[Phys. Rev. E 77, 041108] Published Thu Apr 10, 2008 David S. Dean and Satya N. Majumdar 2008-04-10T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041108 Phys. Rev. E 77, 041108 text/html article Physical Review E 77 4 2008-04-10T00:00:00-04:00 041108 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041107 Author(s): Mykhaylo Evstigneev, Olga Zvyagolskaya, Stefan Bleil, Ralf Eichhorn, Clemens Bechinger, and Peter Reimann<br/>We investigate the diffusion of a colloidal particle in a tilted periodic potential created by means of ten rotating optical tweezers arranged on a circle. Because of the viscous drag, the trap rotation leads to the onset of a tilting force in the corotating reference frame, so that in that frame th...<br/>[Phys. Rev. E 77, 041107] Published Tue Apr 08, 2008 Mykhaylo Evstigneev, Olga Zvyagolskaya, Stefan Bleil, Ralf Eichhorn, Clemens Bechinger, and Peter Reimann 2008-04-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041107 Phys. Rev. E 77, 041107 text/html article Physical Review E 77 4 2008-04-08T00:00:00-04:00 041107 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.041106 Author(s): Paolo Sibani and Simon Christiansen<br/>At time t after an initial quench, an aging system responds to a perturbation turned on at time t_{w} <t in a way mainly depending on the number of intermittent energy fluctuations, so-called quakes, which fall within the observation interval (t_{w} ,t] [P. Sibani, G. F. Rodriguez, and G. G. Kenning, Phys. Rev. B 74, 224407 (2006); P. Sibani, Eur. J. Phys. B 58, 483 (2007)]. The temporal distribution of the quakes implies a functional dependence of the average response on the ratio t/t_{w} . Further insight is obtained imposing small temperature steps, so-called T shifts. The average response as a function of t/t_{w,eff} , where t_{w,eff} is the effective age, is similar to the response of a system aged isothermally at the final temperature. Using an Ising model with plaquette interactions, the applicability of analytic formulas for the average isothermal magnetization is confirmed. The T -shifted aging behavior of the model is approximately described using effective ages. Large positive shifts nearly reset the effective age. Negative T shifts offer a more detailed probe of the dynamics. Assuming the marginal stability of the “current” attractor against thermal noise fluctuations, the scaling form t_{w,eff} =t_{w}^{x} and the dependence of the exponent x on the aging temperatures before and after the shift are theoretically available. The predicted form of x has no adjustable parameters. Both the algebraic scaling of the effective age and the form of the exponent reasonably agree with the data. The present simulations thus confirm the crucial role of marginal stability in glassy relaxation.<br/>[Phys. Rev. E 77, 041106] Published Tue Apr 08, 2008 Paolo Sibani and Simon Christiansen 2008-04-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.041106 Phys. Rev. E 77, 041106 text/html article Physical Review E 77 4 2008-04-08T00:00:00-04:00 041106 Statistical physics Statistical physics http://link.aps.org/doi/10.1103/PhysRevE.77.040101 Author(s): Marco Antonio da Silva, G. M. Viswanathan, A. S. Ferreira, and J. C. Cressoni<br/>We investigate a recently proposed non-Markovian random walk model characterized by loss of memories of the recent past and amnestically induced persistence. We report numerical and analytical results showing the complete phase diagram, consisting of four phases, for this system: (i) classical nonpe...<br/><img src="http://prola.aps.org/graphics/rapid30x30.gif" width="30" height="30" alt="Rapid Communication"/><br/>[Phys. Rev. E 77, 040101] Published Tue Apr 08, 2008 Marco Antonio da Silva, G. M. Viswanathan, A. S. Ferreira, and J. C. Cressoni 2008-04-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevE.77.040101 Phys. Rev. E 77, 040101 text/html article Physical Review E 77 4 2008-04-08T00:00:00-04:00 040101 Statistical physics Statistical physics