New integrable coset sigma models

نویسندگان

چکیده

By using the general framework of affine Gaudin models, we construct a new class integrable sigma models. They are defined on coset direct product $N$ copies Lie group over some diagonal subgroup and they depend $3N-2$ free parameters. For $N=1$ corresponding model coincides with well-known symmetric space model. Starting from Hamiltonian formulation, derive Lagrangian for $N=2$ case show that it admits remarkably simple form in terms classical $\mathcal{R}$-matrix underlying integrability these We conjecture similar holds arbitrary $N$. Specifying our construction to $SU(2)$ $N=2$, eliminating one parameters, find three-parametric manifold $T^{1,1}$ as its target space. further comment connection results those existing literature.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Integrable sigma models and perturbed coset models

Sigma models arise frequently in particle physics and condensed-matter physics as lowenergy effective theories. In this paper I compute the exact free energy at any temperature in two hierarchies of integrable sigma models in two dimensions. These theories, the SU(N)/SO(N) models and the O(2P )/O(P ) × O(P ) models, are asymptotically free and exhibit charge fractionalization. When the instanto...

متن کامل

A new family of SU ( 2 ) symmetric integrable sigma models

A new family of SU (2) symmetric integrable sigma models Abstract Local Lagrangeans are derived for a class of SU (2) invariant sigma models admitting two commuting Kac-Moody algebras at the level of Poisson brackets. The one loop renormalizability of these models is established. Some heuristic arguments are presented in favour of their quantum integrability.

متن کامل

Integrable Sigma Models with Θ = Π

A fundamental result relevant to spin chains and two-dimensional disordered systems is that the sphere sigma model with instanton coupling θ = π has a non-trivial low-energy fixed point and a gapless spectrum. This result is extended to two series of sigma models with θ = π: the SU (N)/SO(N) sigma models flow to the SU (N) 1 WZW theory, while the O(2N)/O(N) × O(N) models flow to O(2N) 1 (2N fre...

متن کامل

Integrable Sigma-models and Drinfeld-Sokolov Hierarchies

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 DrinfeldSokolov (generalized mKdV) hierarchies. Conversely, the Drinfeld-Sokolov construction can be used to deduce the existence of commuting charges in these and in wider classes of sigma-models, including those whose target manifolds are e...

متن کامل

Classically integrable boundary conditions for symmetric-space sigma models

We investigate boundary conditions for the nonlinear sigma model on the compact symmetric space G/H. The Poisson brackets and the classical local conserved charges necessary for integrability are preserved by boundary conditions which correspond to involutions which commute with the involution definingH. Applied to SO(3)/SO(2), the nonlinear sigma model on S2, these yield the great circles as b...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Journal of High Energy Physics

سال: 2021

ISSN: ['1127-2236', '1126-6708', '1029-8479']

DOI: https://doi.org/10.1007/jhep03(2021)062