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19922026
Showing 2000 · hep-thShow all

10 papers · 2 filters

hep-th2000★ 31 cited

The Geometry of Fractional Branes

M. Frau, A. Liccardo, R. Musto

By looking at fractional Dp-branes of type IIA on T_4/Z_2 as wrapped branes and by using boundary state techniques we construct the effective low-energy action for the fields gener…

hep-th2000★ 1 cited

The global phase diagram of a modular invariant two dimensional statistical model

G. Cristofano, D. Giuliano, G. Maiella

A generalization of the Coulomb Gas model with modular SL(2, Z)-symmetry allows for a discrete infinity of phases which are characterized by the condensation of dyonic pseudopartic…

hep-th2000★ 23 cited

Another Alternative to Compactification: Noncommutative Geometry and Randall-Sundrum Models

Fedele Lizzi, Gianpiero Mangano, Gennaro Miele

We observe that the main feature of the Randall-Sundrum model, used to solve the hierarchy problem, is already present in a class of Yang-Mills plus gravity theories inspired by no…

hep-th2000★ 2 cited

On the occurrence of mass in field theory

Giampiero Esposito

This paper proves that it is possible to build a Lagrangian for quantum electrodynamics which makes it explicit that the photon mass is eventually set to zero in the physical part…

hep-th2000★ 46 cited

Casimir Energy in the Axial Gauge

Giampiero Esposito, Alexander Yu. Kamenshchik, Klaus Kirsten

The zero-point energy of a conducting spherical shell is studied by imposing the axial gauge via path-integral methods, with boundary conditions on the electromagnetic potential an…

hep-th2000

Quantum Field Theory from First Principles

Giampiero Esposito

When quantum fields are studied on manifolds with boundary, the corresponding one-loop quantum theory for bosonic gauge fields with linear covariant gauges needs the assignment of…

hep-th2000★ 27 cited

Casimir Energy of a Semi-Circular Infinite Cylinder

V. V. Nesterenko, G. Lambiase, G. Scarpetta

The Casimir energy of a semi-circular cylindrical shell is calculated by making use of the zeta function technique. This shell is obtained by crossing an infinite circular cylindri…

hep-th2000★ 25 cited

Some Properties of Non-linear -Models in Noncommutative Geometry

Ludwik Dabrowski, Thomas Krajewski, Giovanni Landi

We introduce non-linear -models in the framework of noncommutative geometry with special emphasis on models defined on the noncommutative torus. We choose as target spaces the t…

hep-th2000★ 3 cited

On electrodynamics of rapidly moving sources

R. Pettorino, G. A. Vilkovisky

Rapidly moving sources create pairs in the vacuum and lose energy. In consequence of this, the velocity of a charged body cannot approach the speed of light closer than a certain l…

hep-th2000★ 1 cited

Boundary Operators in Quantum Field Theory

Giampiero Esposito

The fundamental laws of physics can be derived from the requirement of invariance under suitable classes of transformations on the one hand, and from the need for a well-posed math…