Zobrazeno 1 - 10
of 137
pro vyhledávání: '"Siampos, Konstantinos"'
We construct a generalisation of the $\lambda$-deformation of the Principal Chiral Model (PCM) where we deform just a subgroup $F$ of the full symmetry group $G$. We find that demanding Lax integrability imposes a crucial restriction, namely that the
Externí odkaz:
http://arxiv.org/abs/2407.20323
Autor:
Miskovic, Olivera, Olea, Rodrigo, Petropoulos, P. Marios, Rivera-Betancour, David, Siampos, Konstantinos
Publikováno v:
JHEP12(2023)130
In three-dimensional pseudo-Riemannian manifolds, the Cotton tensor arises as the variation of the gravitational Chern-Simons action with respect to the metric. It is Weyl-covariant, symmetric, traceless and covariantly conserved. Performing a reduct
Externí odkaz:
http://arxiv.org/abs/2310.19929
Publikováno v:
JHEP 01 (2024) 084
We provide the first supersymmetric embedding of an integrable $\lambda$-deformation to type-II supergravity. Specifically, that of the near horizon of the NS1-NS5 brane intersection, geometrically corresponding to $AdS_3 \times S^3 \times T^4$. We s
Externí odkaz:
http://arxiv.org/abs/2310.17700
Publikováno v:
JHEP 04 (2023) 038
We initiate the construction of integrable $\lambda$-deformed WZW models based on non-semisimple groups. We focus on the four-dimensional case whose underlying symmetries are based on the non-semisimple group $E_2^c$. The corresponding gravitational
Externí odkaz:
http://arxiv.org/abs/2212.00037
Publikováno v:
SciPost Phys. 14, 043 (2023)
Integrable $\lambda$-deformed $\sigma$-models are characterized by an underlying current algebra/coset model CFT deformed, at the infinitesimal level, by current/parafermion bilinears. We promote the deformation parameters to dynamical functions of t
Externí odkaz:
http://arxiv.org/abs/2205.09143
Autor:
Petkou, Anastasios C., Petropoulos, P. Marios, Betancour, David Rivera, Siampos, Konstantinos
Publikováno v:
JHEP09(2022)162
We comprehensively study Galilean and Carrollian hydrodynamics on arbitrary backgrounds, in the presence of a matter/charge conserved current. For this purpose, we follow two distinct and complementary paths. The first is based on local invariance, b
Externí odkaz:
http://arxiv.org/abs/2205.09142
Publikováno v:
Nucl.Phys.B 973 (2021) 115594
Kerr-Schild perturbations in General Relativity provide a fruitful way of constructing new exact solutions starting from known ones, elucidating also the structure of the spacetimes. We initiate such a study in the context of string theory and superg
Externí odkaz:
http://arxiv.org/abs/2109.05040
Publikováno v:
Nucl.Phys.B 971 (2021) 115515
A novel class of integrable $\sigma$-models interpolating between exact coset conformal field theories in the IR and hyperbolic spaces in the UV is constructed. We demonstrate the relation to the asymptotic limit of $\lambda$-deformed models for cose
Externí odkaz:
http://arxiv.org/abs/2106.00032
We formulate $\lambda$-deformed $\sigma$-models as QFTs in the upper-half plane. For different boundary conditions we compute correlation functions of currents and primary operators, exactly in the deformation parameter $\lambda$ and for large values
Externí odkaz:
http://arxiv.org/abs/2103.08650
Publikováno v:
JHEP02(2021)065
In the study of integrable non-linear $\sigma$-models which are assemblies and/or deformations of principal chiral models and/or WZW models, a rational function called the twist function plays a central role. For a large class of such models, we show
Externí odkaz:
http://arxiv.org/abs/2010.07879