75,177 research outputs found
On the Kinetic Roughening in Polymer Film Growth by Vapor Deposition
This is a Comment on a recent publication: Y.-P. Zhao et al., Phys. Rev.
Lett. 85, 3229 (2000). In the Letter, the authors report on an experimental
investigation of polymeric (p-xylene) thin film growth and propose a new
universality class not previously known. Here, we point out that the critical
exponents reported in the Letter are consistent with the critical exponents of
Das Sarma-Tamborenea growth model.Comment: 2 pages, 1 figure include
Randall-Sundrum with Kalb-Ramond field: return of the hierarchy problem?
We show that when the antisymmetric Kalb-Ramond field is included in the
Randall-Sundrum scenario, although the hierarchy problem can be solved, it
requires an extreme fine tuning of the Kalb-Ramond field (about 1 part in
). We interpret this as the return of the problem in disguise.
Further, we show that the Kalb-Ramond field induces a small negative
cosmological constant on the visible brane.Comment: 8 pages, latex, 4 figures. Contributed talk at `Recent Developments
in Gravity' (NEB XII), Nafplion, Greece, 29 June 200
Specific heat at constant volume in the thermodynamic model
A thermodynamic model for multifragmentation which is frequently used appears
to give very different values for specific heat at constant volume depending
upon whether canonical or grand canonical ensemble is used. The cause for this
discrepancy is analysed.Comment: Revtex, 7 pages including 4 figure
- …