Zobrazeno 1 - 10
of 852
pro vyhledávání: '"A P, Niarchos"'
We study tree-level scattering processes of arbitrary string states using the DDF formalism and suitable coherent vertex operators. We obtain new exact compact formulae for heavy-heavy-light-light scattering amplitudes in open or closed bosonic strin
Externí odkaz:
http://arxiv.org/abs/2407.16476
Operators with integer scaling dimensions in even-dimensional conformal field theories exhibit well-known type-B Weyl anomalies. In general, these anomalies depend non-trivially on exactly marginal couplings. We study the corresponding fully covarian
Externí odkaz:
http://arxiv.org/abs/2210.10891
We study numerically the 6D (2,0) superconformal bootstrap using the soft-Actor-Critic (SAC) algorithm as a stochastic optimizer. We focus on the four-point functions of scalar superconformal primaries in the energy-momentum multiplet. Starting from
Externí odkaz:
http://arxiv.org/abs/2209.02801
Autor:
Loukaidou, G. A., Gazeas, K. D., Palafouta, S., Athanasopoulos, D., Zola, S., Liakos, A., Niarchos, P. G., Hakala, P., Essam, A., Hatzidimitrio, D.
Ultra-short orbital period contact binaries (Porb < 0.26 d) host some of the smallest and least massive stars. These systems are faint and rare, and it is believed that they have reached a contact configuration after several Gyrs of evolution via ang
Externí odkaz:
http://arxiv.org/abs/2112.06631
Autor:
Nguyen, Nam, Niarchos, Vasilis
Publikováno v:
JHEP 06 (2022) 055
We construct analytically a perturbative supergravity solution that captures the backreaction of a metastable state of anti-branes in the background of a particular modification of the Klebanov-Strassler throat in a long-wavelength approximation. Our
Externí odkaz:
http://arxiv.org/abs/2112.04514
We introduce the use of reinforcement-learning (RL) techniques to the conformal-bootstrap programme. We demonstrate that suitable soft Actor-Critic RL algorithms can perform efficient, relatively cheap high-dimensional searches in the space of scalin
Externí odkaz:
http://arxiv.org/abs/2108.09330
In this paper we deploy for the first time Reinforcement-Learning algorithms in the context of the conformal-bootstrap programme to obtain numerical solutions of conformal field theories (CFTs). As an illustration, we use a soft Actor-Critic algorith
Externí odkaz:
http://arxiv.org/abs/2108.08859
Autor:
Gazeas, K. D., Loukaidou, G. A., Niarchos, P. G., Palafouta, S., Athanasopoulos, D., Liakos, A., Zola, S., Essam, A., Hakala, P.
Binary and multiple stellar systems are numerous in our solar neighborhood with 80 per cent of the solar-type stars being members of systems with high order multiplicity. The Contact Binaries Towards Merging (CoBiToM) Project is a programme that focu
Externí odkaz:
http://arxiv.org/abs/2102.04759
Autor:
Liakos, Alexios, Niarchos, Panagiotis
The present work concerns the Asteroseismology of the Kepler detached eclipsing binary KIC 8504570. Particularly, it focuses on the pulsational behaviour of the oscillating component of this system and the estimation of its physical parameters in ord
Externí odkaz:
http://arxiv.org/abs/2010.10187
We investigate emergent gravity extending the paradigm of the AdS/CFT correspondence. The emergent graviton is associated to the (dynamical) expectation value of the energy-momentum tensor. We derive the general effective description of such dynamics
Externí odkaz:
http://arxiv.org/abs/2010.04729