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Showing 1 to 12 of 27309 entries
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Linear response formula for open systems.

Physical review. E, Statistical, nonlinear, and soft matter physics

Narayan O.
PMID: 21797305
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):061110. doi: 10.1103/PhysRevE.83.061110. Epub 2011 Jun 10.

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,...

Entropic equation of state and scaling functions near the critical point in uncorrelated scale-free networks.

Physical review. E, Statistical, nonlinear, and soft matter physics

von Ferber C, Folk R, Holovatch Y, Kenna R, Palchykov V.
PMID: 21797309
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):061114. doi: 10.1103/PhysRevE.83.061114. Epub 2011 Jun 13.

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...

Diffusive behavior of a greedy traveling salesman.

Physical review. E, Statistical, nonlinear, and soft matter physics

Lipowski A, Lipowska D.
PMID: 21797310
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):061115. doi: 10.1103/PhysRevE.83.061115. Epub 2011 Jun 13.

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...

Critical interfaces and duality in the Ashkin-Teller model.

Physical review. E, Statistical, nonlinear, and soft matter physics

Picco M, Santachiara R.
PMID: 21797319
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):061124. doi: 10.1103/PhysRevE.83.061124. Epub 2011 Jun 16.

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...

Surface-induced reduction of twisting power in liquid-crystal films.

Physical review. E, Statistical, nonlinear, and soft matter physics

Pan L, Huang CC.
PMID: 21797293
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):060702. doi: 10.1103/PhysRevE.83.060702. Epub 2011 Jun 20.

Null transmission ellipsometry was employed to study the temperature evolution of the helical structure of the smectic-C(α)* phase. Free-standing films with thickness ranging from 31 to more than 400 layers were prepared and studied. The experimental results show a...

Do athermal amorphous solids exist?.

Physical review. E, Statistical, nonlinear, and soft matter physics

Hentschel HG, Karmakar S, Lerner E, Procaccia I.
PMID: 21797296
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):061101. doi: 10.1103/PhysRevE.83.061101. Epub 2011 Jun 02.

We study the elastic theory of amorphous solids made of particles with finite range interactions in the thermodynamic limit. For the elastic theory to exist, one requires all the elastic coefficients, linear and nonlinear, to attain a finite thermodynamic...

Frequency adaptation in controlled stochastic resonance utilizing delayed feedback method: two-pole approximation for response function.

Physical review. E, Statistical, nonlinear, and soft matter physics

Tutu H.
PMID: 21797301
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):061106. doi: 10.1103/PhysRevE.83.061106. Epub 2011 Jun 07.

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,...

Quantum Maxwell's demon in thermodynamic cycles.

Physical review. E, Statistical, nonlinear, and soft matter physics

Dong H, Xu DZ, Cai CY, Sun CP.
PMID: 21797303
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):061108. doi: 10.1103/PhysRevE.83.061108. Epub 2011 Jun 08.

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....

Manifold of polar smectic liquid crystals with spatial modulation of the order parameter.

Physical review. E, Statistical, nonlinear, and soft matter physics

Dolganov PV, Zhilin VM, Dolganov VK, Kats EI.
PMID: 21797385
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):061705. doi: 10.1103/PhysRevE.83.061705. Epub 2011 Jun 16.

We revisit a theoretical approach based on the discrete Landau model of polar smectic liquid crystals. Treating equilibrium structures on many length scales, we have analyzed different periodically modulated polar smectic phases. Besides already known smectic structures, we have...

Towards understanding the ordering behavior of hard needles: analytical solutions in one dimension.

Physical review. E, Statistical, nonlinear, and soft matter physics

Gurin P, Varga S.
PMID: 21797390
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):061710. doi: 10.1103/PhysRevE.83.061710. Epub 2011 Jun 27.

We re-examine the ordering behavior of a one-dimensional fluid of freely rotating hard needles, where the centers of mass of the particles are restricted to a line. Analytical equations are obtained for the equation of state, order parameter, and...

Stability of liquid crystalline phases in the phase-field-crystal model.

Physical review. E, Statistical, nonlinear, and soft matter physics

Achim CV, Wittkowski R, Löwen H.
PMID: 21797392
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):061712. doi: 10.1103/PhysRevE.83.061712. Epub 2011 Jun 29.

The phase-field-crystal model for liquid crystals is solved numerically in two spatial dimensions. This model is formulated with three position-dependent order parameters, namely the reduced translational density, the local nematic order parameter, and the mean local direction of the...

Ideal contribution to the macroscopic quasiequilibrium entropy of anisotropic fluids.

Physical review. E, Statistical, nonlinear, and soft matter physics

Ilg P, Hütter M, Kröger M.
PMID: 21797393
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6):061713. doi: 10.1103/PhysRevE.83.061713. Epub 2011 Jun 29.

The Landau-de Gennes free energy plays a central role in the macroscopic theory of anisotropic fluids. Here, the ideal, entropic contribution to this free energy-that is always present in these systems, irrespectively of the detailed form of interactions or...

Showing 1 to 12 of 27309 entries