Results 111 to 120 of about 25,385,750 (231)

Dyson-Maleev representation of nonlinear sigma-models

, 2008
For nonlinear sigma-models in the unitary symmetry class, the non-linear target space can be parameterized with cubic polynomials. This choice of coordinates has been known previously as the Dyson-Maleev parameterization for spin systems, and we show ...
D A Ivanov, Efetov K B, Efetov K B, Efetov K B, Finkel'stein A M, Kolokolov I V, M A Skvortsov, Maleev S V, Maleev S V, Mehta M L, Ostrovsky P M, Sekatski P, Skvortsov M A, Skvortsov M A, Wilkinson M   +14 more
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Nicolai maps for supersymmetric sigma models

Journal of High Energy Physics
Supersymmetric field theories can be characterized by their Nicolai map, which is a nonlinear and nonlocal field transformation to their free-field limit.
Olaf Lechtenfeld
doaj   +1 more source

Sigma Models and Minimal Surfaces [PDF]

, 1997
The correspondance is established between the sigma models, the minimal surfaces and the Monge-Ampere equation. The Lax -Pairs of the minimality condition of the minimal surfaces and the Monge-Ampere equations are given.
Gurses, Metin
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Phantom Black Holes and Sigma Models

, 2011
We construct static multicenter solutions of phantom Einstein-Maxwell-dilaton theory from null geodesics of the target space, leading to regular black holes without spatial symmetry for certain discrete values of the dilaton coupling constant.
A. Papapetrou, G. Clément, Gérard Clément, H. Stephani, Júlio C. Fabris, K. Bronnikov, K. A. Bronnikov, Manuel E. Rodrigues, Mustapha Azreg-Aïnou, R. Gilmore   +9 more
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Topological defects in K3 sigma models

Journal of High Energy Physics
We consider the topological defect lines commuting with the spectral flow and the N $$ \mathcal{N} $$ = (4, 4) superconformal symmetry in two dimensional non-linear sigma models on K3.
Roberta Angius, Stefano Giaccari, Roberto Volpato   +2 more
doaj   +1 more source

String compactifications on Calabi-Yau stacks

, 2005
In this paper we study string compactifications on Deligne-Mumford stacks. The basic idea is that all such stacks have presentations to which one can associate gauged sigma models, where the group gauged need be neither finite nor effectively-acting ...
Abouelsaood, Abramovich, Adams, Aspinwall, Aspinwall, Beauville, Bridgeland, Caldararu, Callan, Chen, Donagi, Douglas, Douglas, Douglas, Douglas, Edidin, El Kacimi-Alaoui, Eric Sharpe, Freed, Ginsparg, Gomez, Gomez, Harvey, Ito, Katz, Katz, Kresch, Mohri, Pantev, Pantev, Sharpe, Sharpe, Sharpe, Sharpe, Sharpe, Silverstein, Tony Pantev, Totaro, Vistoli, Witten, Witten, Witten   +41 more
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Duality, Quotients, and Currents

, 1991
We study the generalization of $R\to 1/R$ duality to arbitrary conformally invariant sigma models with an isometry. We show that any pair of dual sigma models can be represented as quotients of a self-dual sigma model obtained by gauging different ...
Bagger, Buscher, Buscher, Buscher, Buscher, Erik Verlinde, Fayet, Fridling, Gates, Gates, Giveon, Hitchin, Hull, Hull, Kikkawa, Kiritsis, Lindström, Martin Roček, Roček, Siegel, Tseytlin, Witten, Zumino   +22 more
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ON RENORMALIZATION OF POISSON–LIE T-PLURAL SIGMA MODELS

Acta Polytechnica, 2013
Covariance of the one-loop renormalization group equations with respect to Poisson–Lie T-plurality of sigma models is discussed. The role of ambiguities in renormalization group equations of Poisson–Lie sigma models with truncated matrices of parameters ...
Ladislav Hlavatý, Josef Navrátil, Libor Šnobl   +2 more
doaj   +1 more source

N=1 Sigma Models in AdS_4

, 2011
We study sigma models in AdS_4 with global N=1 supersymmetry and find that they differ significantly from their flat-space cousins -- the target space is constrained to be a Kahler manifold with an exact Kahler form, the superpotential transforms under ...
Adams, Allan, Jockers, Hans, Kumar, Vijay, Lapan, Joshua M.   +3 more
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Vacua, walls and junctions in GNF,NC

Nuclear Physics B, 2019
We discuss vacua, walls and three-pronged junctions of the mass-deformed nonlinear sigma models on the Grassmann manifold GNF,NC=SU(NF)SU(NC)×SU(NF−NC)×U(1), which are non-Abelian gauge theories for NC≥2. Polyhedra are proposed in [1] to describe Bogomol'
Sunyoung Shin
doaj   +1 more source