Generalised integrable λ- and η-deformations and their relation

Konstantinos, Sfetsos; Siampos, Konstadinos; Thompson, Daniel C. (2015). Generalised integrable λ- and η-deformations and their relation. Nuclear physics. B, 899, pp. 489-512. North Holland 10.1016/j.nuclphysb.2015.08.015

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We construct two-parameter families of integrable λ -deformations of two-dimensional field theories. These interpolate between a CFT (a WZW/gauged WZW model) and the non-Abelian T-dual of a principal chiral model on a group/symmetric coset space. In examples based on the SU(2) WZW model and the SU(2)/U(1) exact coset CFT, we show that these deformations are related to bi-Yang–Baxter generalisations of η-deformations via Poisson–Lie T-duality and analytic continuation. We illustrate the quantum behaviour of our models under RG flow. As a byproduct we demonstrate that the bi-Yang–Baxter σ-model for a general group is one-loop renormalisable.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Konstantinos, Sfetsos and Siampos, Konstadinos

Subjects:

500 Science > 530 Physics

ISSN:

0550-3213

Publisher:

North Holland

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

27 Aug 2015 16:27

Last Modified:

09 Nov 2020 17:42

Publisher DOI:

10.1016/j.nuclphysb.2015.08.015

BORIS DOI:

10.7892/boris.71292

URI:

https://boris.unibe.ch/id/eprint/71292

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