Zobrazeno 1 - 10
of 4 709
pro vyhledávání: '"Á. Valcárcel"'
Memory effects on the current induced propagation of spin textures in NdCo$_5$/Ni$_8$Fe$_2$ bilayers
Autor:
Fernández, Victoria Vega, Herguedas-Alonso, Alicia Estela, Hermosa, Javier, Aballe, Lucía, Sorrentino, Andrea, Valcarcel, Ricardo, Quiros, Carlos, Martín, Jose Ignacio, Pereiro, Eva, Ferrer, Salvador, Hierro-Rodríguez, Aurelio, Vélez, María
Bilayers of NdCo$_5$/Ni$_8$Fe$_2$ can act as reconfigurable racetracks thanks to the parallel stripe domain configuration present in the hard magnetic material with weak perpendicular anisotropy (NdCo$_5$), and its imprint on the soft magnetic layer
Externí odkaz:
http://arxiv.org/abs/2406.01091
Publikováno v:
Phys. Rev. D 109 (2024) 10, 104075
We analyse the stability of the vector and axial sectors of Poincar\'e gauge theory around general backgrounds in the presence of cubic order invariants defined from the curvature and torsion tensors, showing how the latter can in fact cancel out wel
Externí odkaz:
http://arxiv.org/abs/2402.08937
Publikováno v:
Phys.Rev.D 110 (2024) 2, 024017
We formulate cosmological perturbation theory around the spatially curved FLRW background in the context of metric-affine gauge theory of gravity which includes torsion and nonmetricity. Performing scalar-vector-tensor decomposition of the spatial pe
Externí odkaz:
http://arxiv.org/abs/2310.16007
Publikováno v:
Phys.Rev.D 108 (2023) 4, 044037
We present a complete algebraic classification for the curvature tensor in Weyl-Cartan geometry, by applying methods of eigenvalues and principal null directions on its irreducible decomposition under the group of global Lorentz transformations, thus
Externí odkaz:
http://arxiv.org/abs/2305.05501
Dilaton gravities in two dimensions can be formulated as particular Poisson sigma models. Target space diffeomorphisms map different models to each other and establish a one-to-one correspondence between their classical solutions. We obtain a general
Externí odkaz:
http://arxiv.org/abs/2304.08523
Autor:
Pearce, Tim, Rashid, Tabish, Kanervisto, Anssi, Bignell, Dave, Sun, Mingfei, Georgescu, Raluca, Macua, Sergio Valcarcel, Tan, Shan Zheng, Momennejad, Ida, Hofmann, Katja, Devlin, Sam
Publikováno v:
ICLR 2023
Diffusion models have emerged as powerful generative models in the text-to-image domain. This paper studies their application as observation-to-action models for imitating human behaviour in sequential environments. Human behaviour is stochastic and
Externí odkaz:
http://arxiv.org/abs/2301.10677
Publikováno v:
JCAP02(2023)018
In the framework of Metric-Affine Gravity, the existing correspondence between the Einstein tensor and the energy-momentum tensor of matter provided by General Relativity is extended towards a post-Riemannian description in terms of the torsion and n
Externí odkaz:
http://arxiv.org/abs/2210.05998
Publikováno v:
JCAP08(2022)082
Symmetric teleparallel gravity is constructed with a nonzero nonmetricity tensor while both torsion and curvature are vanishing. In this framework, we find exact scalarised spherically symmetric static solutions in scalar-tensor theories built with a
Externí odkaz:
http://arxiv.org/abs/2206.02725
Autor:
Valcárcel, Carlos
We study a bi-parametric family of dilaton gravity models with constant and negative curvature. This family includes the Jackiw-Teitelboim gravity and the Liouville gravity model induced by a bosonic string. Furthermore, this family is conformally eq
Externí odkaz:
http://arxiv.org/abs/2205.03959
Autor:
Gomariz, Alvaro, Lu, Huanxiang, Li, Yun Yvonna, Albrecht, Thomas, Maunz, Andreas, Benmansour, Fethallah, Valcarcel, Alessandra M., Luu, Jennifer, Ferrara, Daniela, Goksel, Orcun
Accurate segmentation of retinal fluids in 3D Optical Coherence Tomography images is key for diagnosis and personalized treatment of eye diseases. While deep learning has been successful at this task, trained supervised models often fail for images t
Externí odkaz:
http://arxiv.org/abs/2203.03664