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19922026
Showing 2001 · hep-thShow all

9 papers · 2 filters

hep-th2001★ 75 cited

Infinitely many star products to play with

J. M. Gracia-Bondia, F. Lizzi, G. Marmo +1

While there has been growing interest for noncommutative spaces in recent times, most examples have been based on the simplest noncommutative algebra: [x_i,x_j]=i theta_{ij}. Here…

hep-th2001★ 42 cited

Fractional Branes and N=1 Gauge Theories

M. Bertolini, P. Di Vecchia, G. Ferretti +1

We discuss fractional D3-branes on the orbifold C^3/Z_2*Z_2. We study the open and the closed string spectrum on this orbifold. The corresponding N=1 theory on the brane has, gener…

hep-th2001★ 5 cited

Casimir energy of a dilute dielectric ball at zero and finite temperature

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

The basic results in calculations of the thermodynamic functions of electromagnetic field in the background of a dilute dielectric ball at zero and finite temperature are presented…

hep-th2001★ 26 cited

On the Phase Transition of Conformal Field Theories with Holographic Duals

L. Cappiello, W. Mueck

We study the thermodynamic relations of conformal field theories (CFTs), which are holographically dual to anti-de Sitter-Schwarzschild bulk space-times. A Cardy-Verlinde formula i…

hep-th2001★ 62 cited

Geometry of the Gauge Algebra in Noncommutative Yang-Mills Theory

F. Lizzi, R. J. Szabo, A. Zampini

A detailed description of the infinite-dimensional Lie algebra of star-gauge transformations in noncommutative Yang-Mills theory is presented. Various descriptions of this algebra…

hep-th2001

Towards a Spectral Proof of the Mass Gap in QCD?

Giampiero Esposito

Yang--Mills theory in four dimensions is studied by using the Coulomb gauge. The Coulomb gauge Hamiltonian involves integration of matrix elements of an operator P built from the L…

hep-th2001★ 50 cited

Orbital Magnetism of Two-Dimension Noncommutative Confined System

Ahmed Jellal

We study a system of spinless electrons moving in a two dimensional noncommutative space subject to a perpendicular magnetic field and confined by a harmonic potential typ…

hep-th2001★ 14 cited

Non-Hermitian oscillator-like Hamiltonians and -coherent states revisited

J. Beckers, J. F. Cariñena, N. Debergh +1

Previous -deformed {\it non-Hermitian} Hamiltonians with respect to the usual scalar product of Hilbert spaces dealing with harmonic oscillator-like developments are (re)conside…

hep-th2001★ 8 cited

Tunnelling Effects in a Brane System and Quantum Hall Physics

L. Cappiello, G. Cristofano, G. Maiella +1

We argue that a system of interacting D-branes, generalizing a recent proposal, can be modelled as a Quantum Hall fluid. We show that tachyon condensation in such a system is equiv…