Results 61 to 70 of about 1,372,703 (368)
Exceptional scalar theories in de Sitter space
Journal of High Energy Physics, 2022 The special galileon and Dirac-Born-Infeld (DBI) theories are effective field theories of a single scalar field that have many interesting properties in flat space. These theories can be extended to all maximally symmetric spaces, where their algebras of
James Bonifacio +3 more
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, 2004 A generalised equivalence principle is put forward according to which space-time symmetries and internal quantum symmetries are indistinguishable before symmetry breaking.
Brody, Dorje C., Hughston, Lane P.
core +1 more source
Non-Lorentzian expansions of the Lorentz force and kinematical algebras
Journal of High Energy PhysicsWe consider non-Lorentzian expansions, Galilean and Carrollian, of the Lorentz force equation in which both the particle position and the electro-magnetic field are expanded.
José Luis V. Cerdeira +2 more
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On the Evolution of Approaches to the Space-Time Symmetry
Natural Science, 2018 The general space-time composition was analyzed starting in ancient times. During the previous three millenniums, to explain elementary physical phenomena, the world was twice admitted to be immersed into an “aether”. Presently the “aether” is assumed to be asymptotically close to the vacuum.
Petelin, Mikhail, Thumm, Manfred
openaire +4 more sources
A stepwise emergence of evolution in the RNA world
FEBS Letters, EarlyView.How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley +1 more source
Hamiltonian structure and asymptotic symmetries of the Einstein-Maxwell system at spatial infinity
Journal of High Energy Physics, 2018 We present a new set of asymptotic conditions for gravity at spatial infinity that includes gravitational magnetic-type solutions, allows for a non-trivial Hamiltonian action of the complete BM S 4 algebra, and leads to a non-divergent behaviour of the ...
Marc Henneaux, Cédric Troessaert
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FEBS Open Bio, EarlyView.Stem cell‐based embryo models (SCBEMs) are valuable to study early developmental milestones. Matrigel, a basement membrane matrix, is a critical substrate used in various SCBEM protocols, but its role in driving stem cell lineage commitment is not clearly defined.
Atoosa Amel +3 more
wiley +1 more source
UV completion without symmetry restoration
, 2013 We show that it is not possible to UV-complete certain low-energy effective theories with spontaneously broken space-time symmetries by embedding them into linear sigma models, that is, by adding "radial" modes and restoring the broken symmetries.
Endlich, Solomon +2 more
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On free Lie algebras and particles in electro-magnetic fields
Journal of High Energy Physics, 2017 The Poincaré algebra can be extended (non-centrally) to the Maxwell algebra and beyond. These extensions are relevant for describing particle dynamics in electromagnetic backgrounds and possibly including the backreaction due the presence of multipoles ...
Joaquim Gomis, Axel Kleinschmidt
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Reductions of exceptional field theories
Journal of High Energy Physics, 2020 Double Field Theory (DFT) and Exceptional Field Theory (EFT), collectively called ExFTs, have proven to be a remarkably powerful new framework for string and M-theory.
David S. Berman, Ray Otsuki
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