scholarly journals Critical velocity in 3He-B vibrating wire experiments as analog of vacuum instability in a slowly oscillating electric field

1999 ◽  
Vol 88 (1) ◽  
pp. 40-45 ◽  
Author(s):  
A. Calogeracos ◽  
G. E. Volovik
Keyword(s):  
Electric Field ◽  
Critical Velocity ◽  
Vibrating Wire ◽  
Vacuum Instability ◽  
Oscillating Electric Field

Parametric excitation in an inhomogeneous plasma

1971 ◽  
Vol 5 (1) ◽  
pp. 107-113 ◽  
Author(s):  
C. S. Chen
Keyword(s):  
Electric Field ◽  
Parametric Excitation ◽  
Growth Rates ◽  
Inhomogeneous Plasma ◽  
Electron Plasma ◽  
Transverse Waves ◽  
Circularly Polarized ◽  
Polarized Waves ◽  
Oscillating Electric Field ◽  
Unmagnetized Plasma

An infinite, inhomogeneous electron plasma driven by a spatially uniform oscillating electric field is investigated. The multi-time perturbation method is used to analyze possible parametric excitations of transverse waves and to evaluate their growth rates. It is shown that there exist subharmonic excitations of: (1) a pair of transverse waves in an unmagnetized plasma and (2) a pair of one right and one left circularly polarized wave in a magnetoplasma. Additionally, parametric excitation of two right or two left circularly polarized waves with different frequencies can exist in a magnetoplasma. The subharmonic excitations are impossible whenever the density gradient and the applied electric field are perpendicular. However, parametric excitation is possible with all configurations.

Oscillating Electric Field Effects on Adsorption of the Methane–Water System on Kaolinite Surface

2018 ◽  
Vol 32 (11) ◽  
pp. 11440-11451 ◽  
Author(s):  
Yudou Wang ◽  
Bo Liao ◽  
Zhaoyang Kong ◽  
Zhigang Sun ◽  
Li Qiu ◽  
...  
Keyword(s):  
Electric Field ◽  
Water System ◽  
Electric Field Effects ◽  
Field Effects ◽  
Oscillating Electric Field ◽  
Kaolinite Surface

PHYSICAL INTERPRETATION OF BLACK HOLE EVAPORATION AS A VACUUM INSTABILITY

1992 ◽  
Vol 01 (01) ◽  
pp. 169-191 ◽  
Author(s):  
R. PARENTANI ◽  
R. BROUT
Keyword(s):  
Black Hole ◽  
Electric Field ◽  
Physical Interpretation ◽  
Particle Production ◽  
Pair Creation ◽  
The Other ◽  
Static Electric Field ◽  
Black Hole Evaporation ◽  
Tunneling Mechanism ◽  
Vacuum Instability

Using tunneling concepts which account for particle production in the cases of an accelerated detector and a static electric Field in Minkowski space, the more elusive case of black hole evaporation is analyzed in terms of a detailed tunneling mechanism. For the case of the incipient black hole (collapsing star) Hawking’s “heuristic” picture in terms of pair creation, wherein one member crosses the horizon to fall into the singularity as the other is emitted to infinity, is established. The inception of tunneling is due to the motion of the star’s surface, but its completion concerns traversal of the horizon, thereby reconciling varying schools of thought concerning this problem.

scholarly journals Screening and enhancement of an oscillating electric field in molecules

2019 ◽  
Vol 99 (1) ◽  
Author(s):  
H. B. Tran Tan ◽  
V. V. Flambaum ◽  
I. B. Samsonov
Keyword(s):  
Electric Field ◽  
Oscillating Electric Field

scholarly journals Electrically powered motions of toron crystallites in chiral liquid crystals

2020 ◽  
Vol 117 (12) ◽  
pp. 6437-6445 ◽  
Author(s):  
Hayley R. O. Sohn ◽  
Ivan I. Smalyukh
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Soft Matter ◽  
Building Blocks ◽  
Rigid Particles ◽  
Deformable Particle ◽  
External Stresses ◽  
Oscillating Electric Field ◽  
Experimental Geometry ◽  
Chiral Liquid Crystals

Malleability of metals is an example of how the dynamics of defects like dislocations induced by external stresses alters material properties and enables technological applications. However, these defects move merely to comply with the mechanical forces applied on macroscopic scales, whereas the molecular and atomic building blocks behave like rigid particles. Here, we demonstrate how motions of crystallites and the defects between them can arise within the soft matter medium in an oscillating electric field applied to a chiral liquid crystal with polycrystalline quasi-hexagonal arrangements of self-assembled topological solitons called “torons.” Periodic oscillations of electric field applied perpendicular to the plane of hexagonal lattices prompt repetitive shear-like deformations of the solitons, which synchronize the electrically powered self-shearing directions. The temporal evolution of deformations upon turning voltage on and off is not invariant upon reversal of time, prompting lateral translations of the crystallites of torons within quasi-hexagonal periodically deformed lattices. We probe how these motions depend on voltage and frequency of oscillating field applied in an experimental geometry resembling that of liquid crystal displays. We study the interrelations between synchronized deformations of the soft solitonic particles and their arrays, and the ensuing dynamics and giant number fluctuations mediated by motions of crystallites, five–seven defects pairs, and grain boundaries in the orderly organizations of solitons. We discuss how our findings may lead to technological and fundamental science applications of dynamic self-assemblies of topologically protected but highly deformable particle-like solitons.

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