Zobrazeno 1 - 10
of 15 993
pro vyhledávání: '"D'Antonio, L"'
We explore the consequences of the breaking of diffeomorphism (Diff) invariance in the electromagnetic sector. We consider the breaking of Diff symmetry down to the subgroup of transverse diffeomorphisms (TDiff) and analyse its impact on the generati
Externí odkaz:
http://arxiv.org/abs/2407.04647
Autor:
Bello-Morales, Antonio G., Jiménez, Jose Beltrán, Cano, Alejandro Jiménez, Maroto, Antonio L., Koivisto, Tomi S.
Theories formulated in the arena of teleparallel geometries are generically plagued by ghost-like instabilities or other pathologies that are ultimately caused by the breaking of some symmetries. In this work, we construct a class of ghost-free theor
Externí odkaz:
http://arxiv.org/abs/2406.19355
Publikováno v:
Porc. Combust. Inst. (2019) 37(2), 1971-1977
Most studies of triple flames in counterflowing streams of fuel and oxidizer have been focused on the symmetric problem in which the stoichiometric mixture fraction is $1/2$. There then exist lean and rich premixed flames of roughly equal strengths,
Externí odkaz:
http://arxiv.org/abs/2406.19090
Publikováno v:
Combust. Flame (2020) 216, 426-438
Numerical computations employing detailed chemistry are used to characterize the different combustion modes emerging in mixing layers separating nitrogen-diluted counterflowing planar streams of hydrogen and oxygen. Attention is focused on high degre
Externí odkaz:
http://arxiv.org/abs/2406.18232
This paper shows how to construct genre patterns, whose purpose is to guide interactive story composition in a way that enforces thematic consistency. To start the discussion we argue, based on previous seminal works, for the existence of five fundam
Externí odkaz:
http://arxiv.org/abs/2405.06685
Despite many reports of valley-related phenomena in graphene and its multilayers, current transport experiments cannot probe valley phenomena without the application of external fields. Here we propose a gate-defined valley splitter as a direct trans
Externí odkaz:
http://arxiv.org/abs/2405.00538
Publikováno v:
Phys. Rev. D 109, 103504 (2024)
We study the dynamics of Abelian gauge fields invariant under transverse diffeomorphisms (TDiff) in cosmological contexts. We show that in the geometric optics approximation, very much as for Diff invariant theories, the corresponding massless gauge
Externí odkaz:
http://arxiv.org/abs/2402.18368
We explore the idea of restoring the full diffeomorphism (Diff) invariance in theories with only transverse diffeomorphisms (TDiff) by the introduction of additional fields. In particular, we consider in detail the case of a TDiff invariant scalar fi
Externí odkaz:
http://arxiv.org/abs/2402.17422
Publikováno v:
Entropy 2023, 25(12), 1615
Using a single-site mean-field approximation (MFA) and Monte Carlo simulations, we examine Ising-like models on directed regular random graphs. The models are directed-network implementations of the Ising model, Ising model with absorbing states, and
Externí odkaz:
http://arxiv.org/abs/2312.02398
In this work we present a unified model for the cosmological dark sector. The theory is based on a simple minimally coupled scalar field whose action only contains a canonical kinetic term and is invariant under transverse diffeomorphisms (TDiff). Th
Externí odkaz:
http://arxiv.org/abs/2311.16836