scholarly journals Generalized Schwinger effect and particle production in an expanding universe

2019 ◽  
Vol 100 (4) ◽  
Author(s):  
Karthik Rajeev ◽  
Sumanta Chakraborty ◽  
T. Padmanabhan
Keyword(s):  
Particle Production ◽  
Expanding Universe ◽  
Schwinger Effect

scholarly journals Demystifying the constancy of the Ermakov–Lewis invariant for a time-dependent oscillator

2018 ◽  
Vol 33 (07n08) ◽  
pp. 1830005 ◽  
Author(s):  
T. Padmanabhan
Keyword(s):  
Harmonic Oscillator ◽  
Physical Interpretation ◽  
Particle Production ◽  
Conserved Quantity ◽  
Time Dependent ◽  
Quantum Fields ◽  
Expanding Universe ◽  
Simple Physical Interpretation ◽  
Schwinger Effect ◽  
External Time

It is well known that the time-dependent harmonic oscillator (TDHO) possesses a conserved quantity, usually called Ermakov–Lewis invariant. I provide a simple physical interpretation of this invariant as well as a whole family of related invariants. This interpretation does not seem to have been noticed in the literature before. The procedure also allows one to tackle some key conceptual issues which arise in the study of quantum fields in the external, time-dependent backgrounds like in the case of particle production in an expanding universe and Schwinger effect.

scholarly journals Particle production in an expanding universe dominated by dark energy fluid

2008 ◽  
Vol 14 (2) ◽  
pp. 140-146 ◽  
Author(s):  
A. B. Batista ◽  
J. C. Fabris ◽  
S. J. M. Houndjo
Keyword(s):  
Dark Energy ◽  
Particle Production ◽  
Expanding Universe

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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