Results 1 - 10 of 4540
Results 1 - 10 of 4540. Search took: 0.026 seconds
|Sort by: date | relevance|
[en] Based on the scaling idea of local slopes by Lopez et al. [Phys. Rev. Lett. 94 (2005) 166103], we investigate anomalous dynamic scaling of (d + 1)-dimensional surface growth equations with spatially and temporally correlated noise. The growth equations studied include the Kardar-Parisi-Zhang (KPZ), Sun-Guo-Grant (SGG), and Lai-Das Sarma-Villain (LDV) equations. The anomalous scaling exponents in both the weak- and strong-coupling regions are obtained, respectively
[en] SrCoOF is a recently-synthesized compound that has an antiferromagnetic high-spin (HS) order at ambient pressure with a Néel temperature of 323 K. Under pressure, the HS nature of the ground-state transforms into a low-spin (LS). In this talk, we provide a theoretical analysis combining LDA+DMFT and strong-coupling effective model consistent with the experimental studies that, in addition to the observed paramagnetic and antiferromagnetic regimes, points to the existence of a spin-state ordered (SSO) phase in between. This order is characterized by a checkerboard arrangement of HS and LS + IS (mixture of low- and intermediate-spin states).
[en] We generalize the Wu-Yang strong-coupling theory to solve analytically periodically driven two-level systems in the weak-coupling and low-frequency regimes for single- and multi-period periodic driving of continuous-wave-type and pulse-type including ultrashort pulses of a few cycles. We also derive a general formula of the AC Stark shift suitable for such diverse situations
[en] We report a comparative Raman study on the layered, 2D multiferroic compounds NiTeO and PbNiMnTeO. The emergence of 2-magnon scattering enables a characterization of their magnetic subsystems. Phonon anomalies below the magnetic ordering temperatures evidence a strong coupling between lattice and spin degrees of freedom in both systems.
[en] To describe the transverse momentum spectrum of heavy color-singlet production, the joint resummation of threshold and transverse momentum logarithms is investigated. We obtain factorization theorems for various kinematic regimes valid to all orders in the strong coupling, using Soft-Collinear Effective Theory. We discuss how these enable resummation and how to combine regimes. The new ingredients in the factorization theorems are calculated at next-to-leading order, and a range of consistency checks is performed. Our framework goes beyond the current next-to-leading logarithmic accuracy (NLL).
[en] The sustained interest in the strongly coupled one component classical plasma (OCP) over the several years have yielded much insight into its static and dynamical properties. However until the recent molecular dynamics (MD) simulation of Bernu, little was known about the effects of an external magnetic field on the dynamical properties of the strongly coupled OCP in three dimensions. Since, Bernu's results for the velocity autocorrelation functions and the self-diffusion coefficients are not well understood, it is proposed to develop more sophisticated theoretical models for single particle motion in the OCP with an applied magnetic field. (author)
[pt]O interesse mantido em plasma classico de um componente (OCP) fortemente acoplado, durante varios anos tem produzido um profundo conhecimento em suas propriedades estatisticas dinamicas. Entretanto ate a recente simulacao da dinamica molecular (MD) de Bernu, pouco se conhecia sobre os efeitos de um campo magnetico externo sobre as propriedades dinamicas do OCP fortemente acoplado em tres dimensoes. Ja que os resultados de Bernu para funcoes de autocorrelacao para velocidade e coeficientes de auto difusao nao sao bem compreendidas, propoe-se desenvolver modelos teoricos mais sofisticados para o movimento simples de uma particula em OCP com um campo magnetico aplicado. (M.C.K.)
[en] We investigate the strong coupling limit of a family of Chern-Simons-matter theories in the planar limit. The family consists of theories with the gauge group coupled to bi-fundamental hypermultiplets. All observables which can be determined from the planar resolvent turn out to have finite limits in the large ’t Hooft coupling limit. Possible gravity duals are briefly discussed. We observe that Kac-Moody algebras govern the structure of the planar spectral curves of the theories.
[en] In 2005, Van den Broeck introduced a linear irreversible heat engine described by the Onsager relation (Van den Broeck C 2005 Phys. Rev. Lett. 95 190602). Its efficiency at maximum power can reach the Curzon–Ahlborn efficiency under the strong-coupling condition. Further studies reveal that a compressor-based heat engine is approximately a strongly coupled linear irreversible heat engine. In this paper, we demonstrate that a macroscopic thermoelectric engine is a moderately or weakly coupled linear irreversible heat engine. This explains why a macroscopic thermoelectric engine is less efficient than a compressor-based heat engine for same relative temperature differences of heat reservoirs. (paper)