Fluctuation-induced structural forces in nematic films

Fluctuation-Induced Structural Forces in Nematic Films

Vacuum fluctuation forces between ultra-thin films

We have investigated the role of the quantum size effects in the evaluation of the force caused by electromagnetic vacuum fluctuations between ultra-thin films, using the dielectric tensor derived from the particle in a box model. Comparison with the results obtained by adopting a continuum dielectric model shows that, for film thicknesses of 1÷10 nm, the electron confinement causes changes in ...

Charge-Induced Fluctuation Forces in Graphitic Nanostructures

D. Drosdoff, Igor V. Bondarev, Allan Widom, Rudolf Podgornik, and Lilia M. Woods Department of Physics, University of South Florida, Tampa, Florida 33620, USA Department of Mathematics and Physics, North Carolina Central University, Durham, North Carolina 27707, USA Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA Department of Theoretical Physics, Jozef Stefan I...

Fluctuation-induced casimir forces in granular fluids.

We numerically investigate the behavior of driven noncohesive granular media and find that two fixed large intruder particles, immersed in a sea of small particles, experience, in addition to a short-range depletion force, a long-range repulsive force. The observed long-range interaction is fluctuation-induced and we propose a mechanism similar to the Casimir effect that generates it: The hydro...

Fluctuation-Induced Forces in Nonequilibrium Diffusive Dynamics.

Fluctuations in nonequilibrium steady states generically lead to power law decay of correlations for conserved quantities. Embedded bodies which constrain fluctuations, in turn, experience fluctuation induced forces. We compute these forces for the simple case of parallel slabs in a driven diffusive system. Our model calculations show that the force falls off with slab separation d as kBT/d (at...