scholarly journals Quantum particle production effects on the cosmic expansion

2019 ◽  
Vol 100 (4) ◽  
Author(s):  
Fernando Zago ◽  
Arthur Kosowsky
Keyword(s):  
Particle Production ◽  
Quantum Particle ◽  
Cosmic Expansion ◽  
Production Effects

scholarly journals Matter production effects and interacting scenario within a reconstructed mimetic cosmology for late times

2021 ◽  
Vol 81 (7) ◽  
Author(s):  
Víctor H. Cárdenas ◽  
Miguel Cruz ◽  
Samuel Lepe
Keyword(s):  
Dark Sector ◽  
Cosmic Expansion ◽  
Phantom Divide ◽  
Cosmic Evolution ◽  
Matter Production ◽  
Proposed Model ◽  
Phantom Dark Energy ◽  
Effective Level ◽  
Interaction Term ◽  
Production Effects

AbstractIn this work we explore two possible scenarios that can be considered to extend a recent proposed model by the authors known as reconstructed mimetic cosmology. This study is complemented with an statistical analysis for each case. The first scenario considers the inclusion of matter production as a possible source of cosmic expansion in the reconstructed mimetic model, at effective level was found that this construction can cross the phantom divide, the model evolves from quintessence to phantom dark energy. The second scenario corresponds to a construction of an interacting scheme for the dark sector which is described by the unified mimetic model. The resulting interaction term (not imposed by an Ansatz), Q, exhibits changes of sign leading to the violation of the second law along the cosmic evolution and non adiabaticity; the temperatures for the components of the dark sector are computed and such components are shown to be out of thermal equilibrium.

Radiation from moving mirrors and from black holes

1977 ◽  
Vol 356 (1685) ◽  
pp. 237-257 ◽  
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Black Holes ◽  
Particle Production ◽  
Quantum Particle ◽  
Flat Space ◽  
Stimulated Emission ◽  
Quantum Field ◽  
Two Dimensional ◽  
Scalar Quantum

We extend our previous work on scalar quantum particle production by moving mirrors in two-dimensional flat space-time to models with asymptotically null trajectories. This proves to have considerable heuristic value in understanding the mechanism of quantum particle emission from black holes. We demonstrate that Hawking’s derivation of that phenomenon using ray-tracing is mathematically identical to the geometrical optics associated with a certain class of mirror trajectory. Investigation of the simpler system clarifies the relation between particles and energy in quantum field theory. A mirror trajectory is presented by which a flux of particles is created, but no energy at all is radiated. We also show that the stimulated emission that occurs when a single particle is incident on the mirror simply corresponds to the classical reflexion of the associated wave, and that the total energy may decrease in this process.

scholarly journals Sudden singularities survive massive quantum particle production

2011 ◽  
Vol 84 (12) ◽  
Author(s):  
John D. Barrow ◽  
Antônio B. Batista ◽  
Júlio C. Fabris ◽  
Mahouton J. S. Houndjo ◽  
Giuseppe Dito
Keyword(s):  
Particle Production ◽  
Quantum Particle

scholarly journals Quantum particle production at sudden singularities

2008 ◽  
Vol 78 (12) ◽  
Author(s):  
John D. Barrow ◽  
Antonio B. Batista ◽  
Júlio C. Fabris ◽  
Stéphane Houndjo
Keyword(s):  
Particle Production ◽  
Quantum Particle

Intramitochondrial Viruses of Reptilian Cell Origin

1972 ◽  
Vol 30 ◽  
pp. 318-319
Author(s):  
Philip D. Lunger ◽  
H. Fred Clark
Keyword(s):  
Particle Production ◽  
Outer Zone ◽  
Density Variation ◽  
Core Region ◽  
Mitochondrial Membranes ◽  
Virus Particles ◽  
The Core ◽  
Vipera Russelli ◽  
Maturation Stages ◽  
Type Particle

In the course of fine structure studies of spontaneous “C-type” particle production in a viper (Vipera russelli) spleen cell line, designated VSW, virus particles were frequently observed within mitochondria. The latter were usually enlarged or swollen, compared to virus-free mitochondria, and displayed a considerable degree of cristae disorganization.Intramitochondrial viruses measure 90 to 100 mμ in diameter, and consist of a nucleoid or core region of varying density and measuring approximately 45 mμ in diameter. Nucleoid density variation is presumed to reflect varying degrees of condensation, and hence maturation stages. The core region is surrounded by a less-dense outer zone presumably representing viral capsid.Particles are usually situated in peripheral regions of the mitochondrion. In most instances they appear to be lodged between loosely apposed inner and outer mitochondrial membranes.

Electrospray technique for solid lipid-based particle production

2009 ◽  
Vol 00 (00) ◽  
pp. 090930024652050-8
Author(s):  
M. Trotta ◽  
R. Cavalli ◽  
C. Trotta ◽  
R. Bussano ◽  
L. Costa
Keyword(s):  
Particle Production ◽  
Solid Lipid
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