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19922026
Showing 2000 · hep-thShow all

25 papers · 2 filters

hep-th2000★ 21 cited

Hopf solitons and area preserving diffeomorphisms of the sphere

L. A. Ferreira, A. V. Razumov

We consider a (3+1)-dimensional local field theory defined on the sphere. The model possesses exact soliton solutions with non trivial Hopf topological charges, and infinite number…

hep-th2000★ 10 cited

Lagrangian Noether symmetries as canonical transformations

J. Antonio García, J. M. Pons

We prove that, given a time-independent Lagrangian defined in the first tangent bundle of configuration space, every infinitesimal Noether symmetry that is defined in the -tange…

hep-th2000★ 263 cited

The scaling evolution of cosmological constant

Ilya L. Shapiro, Joan Sola

In quantum field theory the parameters of the vacuum action are subject to renormalization group running. In particular, the ``cosmological constant'' is not a constant in a quantu…

hep-th2000★ 85 cited

Nonlinear Supersymmetry, Quantum Anomaly and Quasi-Exactly Solvable Systems

Sergey Klishevich, Mikhail Plyushchay

The nonlinear supersymmetry of one-dimensional systems is investigated in the context of the quantum anomaly problem. Any classical supersymmetric system characterized by the nonli…

hep-th2000★ 130 cited

Solutions to the cosmological constant problems

J. Garriga, A. Vilenkin

We critically review several recent approaches to solving the two cosmological constant problems. The "old" problem is the discrepancy between the observed value of and the lar…

hep-th2000★ 42 cited

Gauge and BRST Generators for Space-Time Non-commutative U(1) Theory

Joaquim Gomis, Kiyoshi Kamimura, Toni Mateos

The Hamiltonian (gauge) symmetry generators of non-local (gauge) theories are presented. The construction is based on the d+1 dimensional space-time formulation of d dimensional no…

hep-th2000★ 2 cited

Some exact results for the three-layer Zamolodchikov model

Herman Boos, Vladimir Mangazeev

In this paper we continue the study of the three-layer Zamolodchikov model started in our previous works. We analyse numerically the solutions to the Bethe ansatz equations. We con…

hep-th2000★ 8 cited

Results from an Algebraic Classification of Calabi-Yau Manifolds

F. Anselmo, J. Ellis, D. V. Nanopoulos +1

We present results from an inductive algebraic approach to the systematic construction and classification of the `lowest-level' CY3 spaces defined as zeroes of polynomial loci asso…

hep-th2000★ 6 cited

BPS States and Automorphisms

Jordi Molins, Joan Simon

The purpose of the present paper is twofold. In the first part, we provide an algebraic characterization of several families of BPS states in M theory,…

hep-th2000★ 45 cited

Matching the observational value of the cosmological constant

E. Elizalde

A simple model is introduced in which the cosmological constant is interpreted as a true Casimir effect on a scalar field filling the universe (e.g. $\mathbf{R} \times \mathbf{T}^p…

hep-th2000★ 2 cited

Deformed Heisenberg Algebra with Reflection, Anyons and Supersymmetry of Parabosons

Mikhail S. Plyushchay

Deformed Heisenberg algebra with reflection appeared in the context of Wigner's generalized quantization schemes underlying the concept of parafields and parastatistics of Green, V…

hep-th2000★ 104 cited

Hamiltonian Formalism for Space-time Non-commutative Theories

Joaquim Gomis, Kiyoshi Kamimura, Josep Llosa

Space-time non-commutative theories are non-local in time. We develop the Hamiltonian formalism for non-local field theories in d space-time dimensions by considering auxiliary d+1…

hep-th2000★ 41 cited

On the nature of fermion-monopole supersymmetry

Mikhail S. Plyushchay

It is shown that the generator of the nonstandard fermion-monopole supersymmetry uncovered by De Jonghe, Macfarlane, Peeters and van Holten, and the generator of its standard N=1/2…

hep-th2000★ 32 cited

Non-Relativistic Non-Commutative Field Theory and UV/IR Mixing

Joaquim Gomis, Karl Landsteiner, Esperanza Lopez

We study a non-commutative non-relativistic scalar field theory in 2+1 dimensions. The theory shows the UV/IR mixing typical of QFT on non-commutative spaces. The one-loop correcti…

hep-th2000★ 154 cited

Radion effective potential in the Brane-World

Jaume Garriga, Oriol Pujolas, Takahiro Tanaka

We show that in brane-world scenarios with warped extra dimensions, the Casimir force due to bulk matter fields may be sufficient to stabilize the radion field . In particular,…

hep-th2000★ 42 cited

Monopole Chern-Simons Term: Charge-Monopole System as a Particle with Spin

Mikhail S. Plyushchay

The topological nature of Chern-Simons term describing the interaction of a charge with magnetic monopole is manifested in two ways: it changes the plane dynamical geometry of a fr…

hep-th2000★ 66 cited

Evidence for Winding States in Noncommutative Quantum Field Theory

W. Fischler, Joaquim Gomis, E. Gorbatov +3

We study noncommutative field theories at finite temperature to learn more about the degrees of freedom in the non-planar sector of these systems. We find evidence for winding stat…

hep-th2000★ 6 cited

Electrons and Photons: Fact not Fiction

Emili Bagan, Martin Lavelle, David McMullan

The particle Fock space of the matter fields in QED can be constructed using the free creation and annihilation operators. However, these particle operators are not, even at asympt…

hep-th2000★ 19 cited

T-duality Covariance of SuperD-branes

Kiyoshi Kamimura, Joan Simon

T-duality realized on SuperD-brane effective actions probing in constant and backgrounds is studied from a pure world volume point of view. It is proved that requ…

hep-th2000★ 12 cited

The Structure of the QCD Potential in 2+1 Dimensions

E. Bagan, M. Lavelle, D. McMullan

We calculate the screening and anti-screening contributions to the inter-quark potential in 2+1 dimensions, which is relevant to the high temperature limit of QCD. We demonstrate t…

hep-th2000★ 4 cited

Towards an Algebraic Classification of Calabi-Yau Manifolds I: Study of K3 Spaces

F. Anselmo, J. Ellis, D. V. Nanopoulos +1

We present an inductive algebraic approach to the systematic construction and classification of generalized Calabi-Yau (CY) manifolds in different numbers of complex dimensions, ba…

hep-th2000★ 10 cited

Non-commutative vs. Commutative Descriptions of D-brane BIons

David Mateos

The U(1) gauge theory on a D3-brane with non-commutative worldvolume is shown to admit BIon-like solutions which saturate a BPS bound on the energy. The mapping of these solutions…

hep-th2000

Interactions of Massive Integer-Spin Fields

Sergei Klishevich

We review the interactions of massive fields of arbitrary integer spins with the constant electromagnetic field and symmetrical Einstein space in the gauge invariant framework. The…

hep-th2000★ 27 cited

Cubic root of Klein-Gordon equation

Mikhail S. Plyushchay, Michel Rausch de Traubenberg

We construct new relativistic linear differential equation in dimensions generalizing Dirac equation by employing the Clifford algebra of the cubic polynomial associated to Kle…