scholarly journals Statistics of current fluctuations in mesoscopic coherent conductors at nonzero frequencies

2003 ◽  
Vol 68 (23) ◽  
Author(s):  
Artem V. Galaktionov ◽  
Dmitri S. Golubev ◽  
Andrei D. Zaikin
Keyword(s):  
Current Fluctuations

scholarly journals Unifying Theory for Casimir Forces: Bulk and Surface Formulations

Universe ◽  
2021 ◽  
Vol 7 (7) ◽  
pp. 225
Author(s):  
Giuseppe Bimonte ◽  
Thorsten Emig
Keyword(s):  
Free Energy ◽  
Path Integral ◽  
Casimir Force ◽  
Hamiltonian Formulation ◽  
Current Fluctuations ◽  
Practical Application ◽  
Casimir Forces ◽  
Surface Approach ◽  
Maxwell Stress Tensor ◽  
Electromagnetic Fluctuation

The principles of the electromagnetic fluctuation-induced phenomena such as Casimir forces are well understood. However, recent experimental advances require universal and efficient methods to compute these forces. While several approaches have been proposed in the literature, their connection is often not entirely clear, and some of them have been introduced as purely numerical techniques. Here we present a unifying approach for the Casimir force and free energy that builds on both the Maxwell stress tensor and path integral quantization. The result is presented in terms of either bulk or surface operators that describe corresponding current fluctuations. Our surface approach yields a novel formula for the Casimir free energy. The path integral is presented both within a Lagrange and Hamiltonian formulation yielding different surface operators and expressions for the free energy that are equivalent. We compare our approaches to previously developed numerical methods and the scattering approach. The practical application of our methods is exemplified by the derivation of the Lifshitz formula.

Impact of critical current fluctuations on the performance of a coated conductor tape

2019 ◽  
Vol 32 (12) ◽  
pp. 124001 ◽  
Author(s):  
Fedor Gömöry ◽  
Ján Šouc ◽  
Miroslav Adámek ◽  
Asef Ghabeli ◽  
Mykola Solovyov ◽  
...  
Keyword(s):  
Critical Current ◽  
Current Fluctuations ◽  
Coated Conductor

scholarly journals Particle-current fluctuations in a variant of the asymmetric Glauber model

2014 ◽  
Vol 89 (1) ◽  
Author(s):  
S. R. Masharian ◽  
P. Torkaman ◽  
F. H. Jafarpour
Keyword(s):  
Glauber Model ◽  
Current Fluctuations ◽  
Particle Current

Phenobarbitone modulation of postsynaptic GABA receptor function on cultured mammalian neurons

1979 ◽  
Vol 206 (1164) ◽  
pp. 319-327 ◽  
Keyword(s):  
Time Constant ◽  
Gaba Receptor ◽  
Aminobutyric Acid ◽  
Current Fluctuations ◽  
Receptor Function ◽  
Spinal Neurons ◽  
Synaptic Currents ◽  
Open Time ◽  
Postsynaptic Action ◽  
The Mean

The anticonvulsant barbiturate phenobarbitone increases membrane current and conductance responses to γ-aminobutyric acid (GABA) in cultured mouse spinal neurons. Analyses of GABA current fluctuations under control conditions and in the presence of phenobarbitone show that the principle action is to increase the average time during which GABA- activated channels remain open. The duration of miniature synaptic currents with a time constant of decay similar to the mean open-time of GABA-activated channels is prolonged by the drug. The results suggest that (1) the synaptic events are GABA-mediated and (2) the enhancement of these events by barbiturate is due to the postsynaptic action of the drug.

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