57,084 research outputs found
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
Higher Dimensional SUSY Quantum Mechanics
Higher dimensional supersymmetric quantum mechanics is studied. General
properties of the two dimensional case are presented. For three spatial
dimesions or higher, a spin structure is shown to arise naturally from the
nonrelativistic supersymmetry algebra.Comment: 8 pages, Late
The gravitating perfect fluid-scalar field equations: quintessence and tachyonic
The system consisting of a self gravitating perfect fluid and scalar field is
considered in detail. The scalar fields considered are the quintessence and
``tachyonic'' forms which have important application in cosmology. Mathematical
properties of the general system of equations are studied including the
algebraic and differential identities as well as the eigenvalue structure. The
Cauchy problem for both quintessence and the tachyon is presented. We discuss
the initial constraint equations which must be satisfied by the initial data. A
Cauchy evolution scheme is presented in the form of a Taylor series about the
Cauchy surface. Finally, a simple numerical example is provided to illustrate
this scheme.Comment: 15 pages, 2 figures. Revised version contains more references.
Accepted for publication in General Relativity and Gravitatio
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