Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Levine, Nat"'
Autor:
Levine, Nat, Paulos, Miguel F.
Locality of bulk operators in AdS imposes stringent constraints on their description in terms of the boundary CFT. These constraints are encoded as sum rules on the bulk-to-boundary expansion coefficients. In this paper, we construct families of sum
Externí odkaz:
http://arxiv.org/abs/2408.00572
Autor:
Levine, Nat
We argue for the matching of 1-loop divergences between 4d Chern-Simons theory with Disorder defects and the corresponding integrable 2d sigma-models of non-ultralocal type. Starting from the 4d path integral, we show under general assumptions that t
Externí odkaz:
http://arxiv.org/abs/2309.16753
Autor:
Levine, Nat, Paulos, Miguel F.
The problem of constructing local bulk observables from boundary CFT data is of paramount importance in holography. In this work, we begin addressing this question from a modern bootstrap perspective. Our main tool is the boundary operator expansion
Externí odkaz:
http://arxiv.org/abs/2305.07078
Integrable string sigma models on AdS$_3$ backgrounds with 16 supersymmetries have the distinguishing feature that their superisometry group is a direct product. As a result the deformation theory of these models is particularly rich since the two su
Externí odkaz:
http://arxiv.org/abs/2212.08625
Autor:
Levine, Nat
We present a simple, new method for the 1-loop renormalization of integrable $\sigma$-models. By treating equations of motion and Bianchi identities on an equal footing, we derive 'universal' formulae for the 1-loop on-shell divergences, generalizing
Externí odkaz:
http://arxiv.org/abs/2209.05502
Autor:
Levine, Nat
Motivated by the search for solvable string theories, we consider the problem of classifying the integrable bosonic 2d $\sigma$-models. We include non-conformal $\sigma$-models, which have historically been a good arena for discovering integrable mod
Externí odkaz:
http://arxiv.org/abs/2112.03928
Autor:
Levine, Nat, Tseytlin, Arkady A.
We consider a class of 2d $\sigma$-models on products of group spaces that provide new examples of a close connection between integrability and stability under the RG flow. We first study the integrable $G \times G$ model derived from the affine Gaud
Externí odkaz:
http://arxiv.org/abs/2103.10513
We consider several classes of $\sigma$-models (on groups and symmetric spaces, $\eta$-models, $\lambda$-models) with local couplings that may depend on the 2d coordinates, e.g. on time $\tau$. We observe that (i) starting with a classically integrab
Externí odkaz:
http://arxiv.org/abs/2008.01112
Following arXiv:1907.04737, we continue our investigation of the relation between the renormalizability (with finitely many couplings) and integrability in 2d $\sigma$-models. We focus on the "$\lambda$-model," an integrable model associated to a gro
Externí odkaz:
http://arxiv.org/abs/1910.00397
Classically integrable $\sigma$-models are known to be solutions of the 1-loop RG equations, or "Ricci flow", with only a few couplings running. In some of the simplest examples of integrable deformations we find that in order to preserve this proper
Externí odkaz:
http://arxiv.org/abs/1907.04737