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- Foundation for Research and Technology HellasGR11 papers
- Centre National de la Recherche ScientifiqueFR9 papers
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23 papers · 1 filter
Non-abelian T-duality, Ramond Fields and Coset Geometries
Yolanda Lozano, Eoin 'O Colgain, Konstadinos Sfetsos +1
We extend previous work on non-abelian T-duality in the presence of Ramond fluxes to cases in which the duality group acts with isotropy such as in backgrounds containing coset spa…
Integrable quantum spin chains and their classical continuous counterparts
Jean Avan, Anastasia Doikou, Konstadinos Sfetsos
We present certain classical continuum long wave-length limits of prototype integrable quantum spin chains, and define the corresponding construction of classical continuum Lax ope…
On non-abelian T-dual geometries with Ramond fluxes
Konstadinos Sfetsos, Daniel C. Thompson
We show how to implement T-duality along non-abelian isometries in backgrounds with non-vanishing Ramond fields. When the dimension of the isometry group is odd (even) the duality…
The Non-Compact Weyl Equation
Anastasia Doikou, Theodora Ioannidou
A non-compact version of the Weyl equation is proposed, based on the infinite dimensional spin zero representation of the sl_2 algebra. Solutions of the aforementioned equation are…
Gradient flows and instantons at a Lifshitz point
Ioannis Bakas
I provide a broad framework to embed gradient flow equations in non-relativistic field theory models that exhibit anisotropic scaling. The prime example is the heat equation arisin…
High spin limits and non-abelian T-duality
Alexios P. Polychronakos, Konstadinos Sfetsos
The action of the non-abelian T-dual of the WZW model is related to an appropriate gauged WZW action via a limiting procedure. We extend this type of equivalence to general sigma-m…