Results 11 to 20 of about 197,944 (293)
Physics Letters B, 2020 We construct a class of viable bouncing models that are conformally related to cosmological inflation. There are three main difficulties in constructing such a model: (i) A stable (attractor) solution, (ii) A non-singular bounce, and (iii) to bypass the ...
Debottam Nandi
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Journal of Cosmology and Astroparticle Physics, 2020 23 pages, 6 main figures, comments are ...
Ilyas, Amara +4 more
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Journal of Cosmology and Astroparticle Physics, 2011 We present a wide class of models which realise a bounce in a spatially flat Friedmann universe in standard General Relativity. The key ingredient of the theories we consider is a noncanonical, minimally coupled scalar field belonging to the class of theories with Kinetic Gravity Braiding / Galileon-like self-couplings.
Easson, Damien A. +2 more
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Journal of Cosmology and Astroparticle Physics, 2018 In general relativity producing a regular bounce entails violation of Null Energy Condition for a dynamical source in the model. That generically indicates existence of ghosts or other instabilities. However, in cuscuton modification of gravity, the correspondence between a background bounce and violation of Null Energy Condition for dynamical sources ...
Boruah, Supranta S. +3 more
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Drop impact dynamic and directional transport on dragonfly wing surface
Friction, 2023 The ability of dragonflies to fly in the rain without being wetted by raindrops has motivated researchers to investigate the impact behavior of a drop on the superhydrophobic wings of dragonflies.
Jing Xu +4 more
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Minimal conditions for the creation of a Friedman-Robertson-Walker universe from a "bounce" [PDF]
, 1998 We investigate the minimal conditions under which the creation of our universe might arise due to a "bounce" from a previous collapse, rather than an explosion from a big-bang singularity. Such a bounce is sometimes referred to as a Tolman wormhole.
Bekenstein +20 more
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Cosmological super-bounce [PDF]
Physical Review D, 2014 38 pages, 13 figures, v3: typos ...
Michael Koehn +2 more
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BTZ Black-Bounce to Traversable Wormhole
Universe, 2022 In this paper, we study the charged and uncharged BTZ counterpart of the black-bounce proposed by Simpson and Visser recently. For the uncharged case, we find that the temperature is not modified by the bounce parameter.
Job Furtado, Geová Alencar
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Journal of Perinatal Education, 2006 In this column, a childbirth educator takes a humorous look at discovering how to recharge her enthusiasm and motivation.
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Cosmological Perturbations Through a Non-Singular Ghost-Condensate/Galileon Bounce [PDF]
, 2014 We study the propagation of super-horizon cosmological perturbations in a non-singular bounce spacetime. The model we consider combines a ghost condensate with a Galileon term in order to induce a ghost-free bounce.
Battarra, Lorenzo +3 more
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