Zobrazeno 1 - 10
of 330
pro vyhledávání: '"Lukas, Andre'"'
Autor:
Constantin, Andrei, Fraser-Taliente, Cristofero S., Harvey, Thomas R., Leung, Lucas T. Y., Lukas, Andre
We study a class of supersymmetric Froggatt-Nielsen (FN) models with multiple $U(1)$ symmetries and Standard Model (SM) singlets inspired by heterotic string compactifications on Calabi-Yau threefolds. The string-theoretic origin imposes a particular
Externí odkaz:
http://arxiv.org/abs/2410.17704
Autor:
Constantin, Andrei, Fraser-Taliente, Cristofero S., Harvey, Thomas R., Lukas, Andre, Ovrut, Burt
We present a numerical computation, based on neural network techniques, of the physical Yukawa couplings in a heterotic string theory compactification on a smooth Calabi-Yau threefold with non-standard embedding. The model belongs to a large class of
Externí odkaz:
http://arxiv.org/abs/2402.01615
Autor:
Chandra, Aditi, Constantin, Andrei, Fraser-Taliente, Cristofero S., Harvey, Thomas R., Lukas, Andre
The diffeomorphism class of simply-connected smooth Calabi-Yau threefolds with torsion-free cohomology is determined via certain basic topological invariants: the Hodge numbers, the triple intersection form, and the second Chern class. In the present
Externí odkaz:
http://arxiv.org/abs/2310.05909
Calabi-Yau manifolds can be obtained as hypersurfaces in toric varieties built from reflexive polytopes. We generate reflexive polytopes in various dimensions using a genetic algorithm. As a proof of principle, we demonstrate that our algorithm repro
Externí odkaz:
http://arxiv.org/abs/2306.06159
The string theory landscape may include a multitude of ultraviolet embeddings of the Standard Model, but identifying these has proven difficult due to the enormous number of available string compactifications. Genetic Algorithms (GAs) represent a pow
Externí odkaz:
http://arxiv.org/abs/2306.03147
Publikováno v:
Class. Quantum Grav. (2023) 40 245015
The cosmological principle asserts that on sufficiently large scales the Universe is homogeneous and isotropic on spatial slices. To deviate from this principle requires a departure from the FLRW ansatz. In this paper we analyze the cosmological evol
Externí odkaz:
http://arxiv.org/abs/2212.03234
Autor:
Lukas, Andre, Ruehle, Fabian
Calabi-Yau threefolds with infinitely many flops to isomorphic manifolds have an extended Kahler cone made up from an infinite number of individual Kahler cones. These cones are related by reflection symmetries across flop walls. We study the implica
Externí odkaz:
http://arxiv.org/abs/2210.09369
Large classes of standard single-field slow-roll inflationary models consistent with the required number of e-folds, the current bounds on the spectral index of scalar perturbations, the tensor-to-scalar ratio, and the scale of inflation can be effic
Externí odkaz:
http://arxiv.org/abs/2208.13804
We introduce neural networks to compute numerical Ricci-flat CY metrics for complete intersection and Kreuzer-Skarke Calabi-Yau manifolds at any point in K\"ahler and complex structure moduli space, and introduce the package cymetric which provides c
Externí odkaz:
http://arxiv.org/abs/2205.13408