14,092 research outputs found
The perturbation of the Seiberg-Witten equations revisited
We introduce a new class of perturbations of the Seiberg-Witten equations.
Our perturbations offer flexibility in the way the Seiberg-Witten invariants
are constructed and also shed a new light to LeBrun's curvature inequalities.Comment: typos correcte
Ultraviolet Property of Noncommutative Wess-Zumino-Witten Model
We construct noncommutative extension of the Wess-Zumino-Witten (WZW) model
and study its ultraviolet property. The \beta-function of the U(N)
noncommutative WZW model resembles that of the ordinary WZW model. The U(1)
noncommutative model has also a nontrivial fixed point.Comment: 7 pages, 1 figur
Nuclear liquid-gas phase transition studied with antisymmetrized molecular dynamics
The nuclear liquid-gas phase transition of the system in ideal thermal
equilibrium is studied with antisymmetrized molecular dynamics. The time
evolution of a many-nucleon system confined in a container is solved for a long
time to get a microcanonical ensemble of a given energy and volume. The
temperature and the pressure are extracted from this ensemble and the caloric
curves are constructed. The present work is the first time that a microscopic
dynamical model which describes nuclear multifragmentation reactions well is
directly applied to get the nuclear caloric curve. The obtained constant
pressure caloric curves clearly show the characteristic feature of the
liquid-gas phase transition, namely negative heat capacity (backbending), which
is expected for the phase transition in finite systems.Comment: 31 pages, 8 figures, added formalism details, several improvements
and new results, submitted to Phys. Rev.
Nilpotency of the Bauer-Furuta stable homotopy Seiberg-Witten invariants
We prove a nilpotency theorem for the Bauer-Furuta stable homotopy
Seiberg-Witten invariants for smooth closed 4-manifolds with trivial first
Betti number.Comment: This is the version published by Geometry & Topology Monographs on 29
January 200
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