Search Results - subject:"Order parameter"

The influence of nonextensivity on orientational ordering in liquid crystal systems with variable molecular shape

Kayacan, Ozhan - In: Physica A: Statistical Mechanics and its Applications 354 (2005) C, pp. 344-354

parameter. The q-dependent variation of the concentration of cis-trans isomers and of the order parameter with the time of … generalized theory is used to investigate the effect of the nonextensivity on the concentration dependence of the long-range order …

Persistent link: https://www.econbiz.de/10010588886

Two-temperature steady-state thermodynamics for a radiation field

Saida, Hiromi - In: Physica A: Statistical Mechanics and its Applications 356 (2005) 2, pp. 481-508

conjugate force. Although the formalism given in this paper may be unique to a radiation field, a nonequilibrium order parameter … of steady states of a radiation field is explicitly defined. This order parameter denotes that the geometrical shape of …

Persistent link: https://www.econbiz.de/10010589361

Classification of equilibrium states and hydrodynamics of quantum Fermi-liquid mixtures with the vector order parameter

Kovalevskii, M. Yu.; Rozhkov, A.A.; Logvinova, L.V. - In: Physica A: Statistical Mechanics and its Applications 336 (2004) 3, pp. 271-293

constructed and hydrodynamic equations of superfluid Fermi-liquid mixture with vector order parameter are derived. Thermodynamic … the order parameter. A new entrainment effect connected with mutual influence of magnetic and orbital degrees of freedom …

Persistent link: https://www.econbiz.de/10010872185

Magnetic susceptibility in quasi one-dimensional Ba<Subscript>a2</Subscript>V<Subscript>3</Subscript>O<Subscript>9</Subscript>: chain segmentation versus the staggered field effect

Schmidt, B.; Yushankhai, V.; Siurakshina, L.; Thalmeier, P. - In: The European Physical Journal B - Condensed Matter and … 32 (2003) 1, pp. 43-47

Persistent link: https://www.econbiz.de/10009280323

Chaotic and regular shear-induced orientational dynamics of nematic liquid crystals

Rienäcker, G.; Kröger, M.; Hess, S. - In: Physica A: Statistical Mechanics and its Applications 315 (2002) 3, pp. 537-568

Based on a relaxation equation for the alignment tensor characterizing the molecular orientation in liquid crystals under flow we present results for the full orientational dynamics of homogeneous liquid crystals in a shear flow. We extend the analysis of the symmetry-adapted states by...

Persistent link: https://www.econbiz.de/10011058283

Generalized definitions of phase transitions

Chomaz, Ph.; Gulminelli, F. - In: Physica A: Statistical Mechanics and its Applications 305 (2002) 1, pp. 330-335

We define a first-order phase transition as a bimodality of the event distribution in the space of observations and we show that this is equivalent to a curvature anomaly of the thermodynamical potential and that it implies the Yang Lee behavior of the zeroes of the partition sum. Moreover, it...

Persistent link: https://www.econbiz.de/10010591808

The two dimensional classical anisotropic Heisenberg ferromagnetic model with nearest- and next-nearest neighbor interactions

Gouvêa, M.E.; Pires, A.S.T. - In: The European Physical Journal B - Condensed Matter and … 25 (2002) 2, pp. 147-153

Persistent link: https://www.econbiz.de/10009281643

Evolution of the system with multiplicative noise

Olemskoi, Alexander I.; Kharchenko, Dmitrii O. - In: Physica A: Statistical Mechanics and its Applications 293 (2001) 1, pp. 178-188

The governed equations for the order parameter, one- and two-time correlators are obtained for systems with white … finite values of the autocorrelator and order parameter. The long-time asymptotes are defined to show that, within the … disordered domain, the autocorrelator decays hyperbolically and the order parameter behaves as a power-law function with …

Persistent link: https://www.econbiz.de/10011058565

Coupled map lattices with complex order parameter

P. Kuznetsov, Sergey; Mosekilde, Erik - In: Physica A: Statistical Mechanics and its Applications 291 (2001) 1, pp. 299-316

We introduce and study coupled map lattices with complex state variable. The dynamical regimes of the finite-length systems are classified naturally in terms of a topological invariant – the overall phase shift accumulated along the whole length at fixed time. A stability analysis of the...

Persistent link: https://www.econbiz.de/10011060691

Finite-temperature characterization and simulations of the molecular assemblies Mn<Subscript> <Emphasis Type="Bold">6 </Subscript> and Ni<Subscript> <Emphasis Type="Bold">12 </Subscript>

Kamieniarz, G.; Matysiak, R.; D'Auria, A. Caramico; … - In: The European Physical Journal B - Condensed Matter and … 23 (2001) 2, pp. 183-189

Persistent link: https://www.econbiz.de/10009281935