Zobrazeno 1 - 10
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pro vyhledávání: '"Evans, Jonathan M."'
Autor:
Evans, Jonathan M.
Theoretical and experimental work on sound propagation in suspensions and emulsions is reviewed. Three theoretical approaches are identified: scattering theory, coupled phase theory and porous media theory. Coupled phase theory is extended and compar
Externí odkaz:
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321314
Autor:
Evans, Jonathan M.
A construction of the magic square, and hence of exceptional Lie algebras, is carried out using trialities rather than division algebras. By way of preparation, a comprehensive discussion of trialities is given, incorporating a number of novel result
Externí odkaz:
http://arxiv.org/abs/0910.1828
Autor:
Evans, Jonathan M.
This is a summary of progress made in understanding the occurrence and properties of local, conserved, commuting charges in non-linear sigma-models, including principal chiral models (PCMs) and WZW models. (Contribution to the NATO-ASI meeting: Integ
Externí odkaz:
http://arxiv.org/abs/hep-th/0103250
Autor:
Evans, Jonathan M.
Publikováno v:
Nucl.Phys. B608 (2001) 591-609
Local commuting charges in sigma-models with classical Lie groups as target manifolds are shown to be related to the conserved quantities appearing in the Drinfeld-Sokolov (generalized mKdV) hierarchies. Conversely, the Drinfeld-Sokolov construction
Externí odkaz:
http://arxiv.org/abs/hep-th/0101231
Autor:
Evans, Jonathan M., Madsen, Jens Ole
Publikováno v:
Int.J.Mod.Phys. A14 (1999) 2551-2580
We discuss certain integrable quantum field theories in (1+1)-dimensions consisting of coupled sine/sinh-Gordon theories with N=1 supersymmetry, positive kinetic energy, and bosonic potentials which are bounded from below. We show that theories of th
Externí odkaz:
http://arxiv.org/abs/hep-th/9712227
Autor:
Evans, Jonathan M., Madsen, Jens Ole
Publikováno v:
Nucl.Phys. B503 (1997) 715-746
An analysis is given of the structure of a general two-dimensional Toda field theory involving bosons and fermions which is defined in terms of a set of simple roots for a Lie superalgebra. It is shown that a simple root system for a superalgebra has
Externí odkaz:
http://arxiv.org/abs/hep-th/9703065
Publikováno v:
Nucl.Phys. B493 (1997) 517-540
The complete spectrum of states in the supersymmetric principal chiral model based on SU(n) is conjectured, and an exact factorizable S-matrix is proposed to describe scattering amongst these states. The SU(n)_L*SU(n)_R symmetry of the lagrangian is
Externí odkaz:
http://arxiv.org/abs/hep-th/9603190
Publikováno v:
Nucl.Phys.Proc.Suppl. 45A (1996) 130-139
An account is given of a technique for testing the equivalence between an exact factorizable S-matrix and an asymptotically-free Lagrangian field theory in two space-time dimensions. The method provides a way of resolving CDD ambiguities in the S-mat
Externí odkaz:
http://arxiv.org/abs/hep-th/9508141
Autor:
Evans, Jonathan M.
Publikováno v:
Lect.Notes Phys. 447 (1995) 218-223
Division algebras are used to explain the existence and symmetries of various sets of auxiliary fields for super Yang-Mills in dimensions $d=3,4,6,10$. (Contribution to G\"ursey Memorial Conference I: Strings and Symmetries)
Comment: 7 pages, pl
Comment: 7 pages, pl
Externí odkaz:
http://arxiv.org/abs/hep-th/9410239
Publikováno v:
Phys.Lett. B343 (1995) 198-206
A formula for the mass-gap of the supersymmetric $\CP^{n-1}$ sigma model ($n > 1$) in two dimensions is derived: $m/\Lambda_{\overline{\rm MS}}=\sin(\pi\Delta)/(\pi\Delta)$ where $\Delta=1/n$ and $m$ is the mass of the fundamental particle multiplet.
Externí odkaz:
http://arxiv.org/abs/hep-th/9409142