Results 231 to 240 of about 6,302,669 (265)
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Critical slowing down at ferroelectric transitions
Physica Status Solidi (a), 1972The dielectric dispersion of ferroelectrics is investigated within the scope of a model developed by Thomas, describing the phase transitions in solids as feedback phenomena. The relations between the eigenfrequencies of the uncoupled and the coupled systems are given and the physical importance of electric boundary conditions is demonstrated.
H.-G. Unruth, H.-J. Wahl
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Critical slowing down in optical bistability
Optics Communications, 1979Abstract The role of critical slowing down in optical bistability is discussed, taking fully into account the non-linear effects. In particular, we show that the critical slowing down may lead to interesting novel applications, such as compact optical delay lines and electric field to time converters.
Bonifacio, R., Meystre, P.
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Simulations without critical slowing down
Physical Review Letters, 1988We have developed a novel simulation method that combines a multigrid technique with a stochastic blocking procedure. Our algorithm eliminates critical slowing down completely, as demonstrated by simulations of the two-dimensional Ising model at criticality.
, Kandel +4 more
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Critical Slowing-Down in Microwave Absorptive Bistability
Topical Meeting on Optical Bistability, 1982In this experiment one utilizes a microwave confocal open resonator in the transmission configuration, having a Q factor of 5 105. The resonator is filled with ammonia gas at the pressure of 1 mTorr. A klystron oscillator, frequency stabilized on the 3-3 ammonia inversion line, feeds the resonator which is tuned at the same frequency.
BARBARINO S +4 more
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Robustness of Variance and Autocorrelation as Indicators of Critical Slowing Down [PDF]
Ecology, 2012 Ecosystems close to a critical threshold lose resilience, in the sense that perturbations can more easily push them into an alternative state. Recently, it has been proposed that such loss of resilience may be detected from elevated autocorrelation and variance in the fluctuations of the state of an ecosystem due to critical slowing down; the ...
Vasilis Dakos +2 more
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Nuclear Physics B - Proceedings Supplements, 1990
Abstract The problem of critical slowing down in Monte Carlo simulations and some methods to alleviate or overcome it are reviewed: overrelaxation, multigrid and cluster algorithms.
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Abstract The problem of critical slowing down in Monte Carlo simulations and some methods to alleviate or overcome it are reviewed: overrelaxation, multigrid and cluster algorithms.
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Critical slowing down in microcanonical Ising dynamics
Physical Review B, 1988We describe measurements of autocorrelation times in a version of Creutz's microcanonical dynamics for the nearest-neighbor Ising system on a 128\ifmmode\times\else\texttimes\fi{}129\ifmmode\times\else\texttimes\fi{}128 lattice. The dynamical critical exponent z is found to be z=2.26\ifmmode\pm\else\textpm\fi{}0.05, which is comparable to the dynamical
, Brower +4 more
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On the critical slowing down in superconductors
Physics Letters A, 1980Abstract The critical dynamics in superconductors without magnetic field is studied by straightforward application of the ϵ-expansion technique to a generalized Ginzburg-Landau model. It is shown that the dynamic critical exponent and the time dependent correlation function coincide with those obtained by the TDGL approach.
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Dynamical critical slowing down in CsNiF3
Solid State Communications, 1986Dynamical critical slowing down in CsNiF3 is studied using the a.c. susceptibility measurements at 9.5 GHz in zero external static magnetic field. The dynamical critical exponent for the relaxation time of the in-plane spin fluctuations is obtained for the temperature interval 6 K < T < 20 K.
A. Caillé, M. Poirier
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Critical slowing down of magnetic fluctuations
Physica B+C, 1977Abstract The a.c. susceptibility of iron whiskers is analysed to show the presence of an inphase contribution from critical slowing down as well as the outphase contribution previously deduced. The slowest characteristic time of the magnetic memory function used to describe the dynamic behavior occurs 15 millidegrees above the T c deduced from the
B. Heinrich, A.S. Arrott
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