3,050,243 research outputs found
Density functional approach to finite temperature nuclear properties and the role of a momentum dependent isovector interaction
Using a density functional approach based on a Skyrme interaction,
thermodynamic properties of finite nuclei are investigated at non-zero
temperture. The role of a momentum dependent isovector term is now studied
besides volume, symmetry, surface and Coulomb effects. Various features
associated with both mechanical and chemical instability and the liquid-gas
coexistence curve are sensitive to the Skyrme interaction. The separated
effects of the isoscalar term and the isovector term of momentum dependent
interaction are studied for a modified SKM() interaction. The frequently
used Skyrme interaction SLy4 is one of the cases considered and is shown to
have better features for neutron star studies due to a larger symmetry energy.Comment: 14 pages, 6 figures, added more discussio
Black Hole Interaction Energy
The interaction energy between two black holes at large separation distance
is calculated. The first term in the expansion corresponds to the Newtonian
interaction between the masses. The second term corresponds to the spin-spin
interaction. The calculation is based on the interaction energy defined on the
two black holes initial data. No test particle approximation is used. The
relation between this formula and cosmic censorship is discussed.Comment: 18 pages, 2 figures, LaTeX2
The interaction of dyons in the mean field approximation
The interaction of dyons in the mean field approximation is considered. The
result of interaction is the mass term for dyonic field in the effective
Lagrangian. Due to the mass term the profile function of dyon falls off
exponentially at large distances.Comment: 4 pages, Late
The Röntgen interaction and forces on dipoles in time-modulated optical fields
The Röntgen term is an often neglected contribution to the interaction between an atom and an electromagnetic field in the electric dipole approximation. In this work we discuss how this interaction term leads to a difference between the kinetic and canonical momentum of an atom which, in turn, leads to surprising radiation forces acting on the atom. We use a number of examples to explore the main features of this interaction, namely forces acting against the expected dipole force or accelerations perpendicular to the beam propagation axis
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