Absence of commensurability in magnetic antidot arrays with classical chaos

1999 ◽  
Vol 60 (16) ◽  
pp. 11535-11539 ◽  
Author(s):  
Ralf Hennig ◽  
Michael Suhrke
Keyword(s):  
Classical Chaos ◽  
Antidot Arrays

Weak Localization in Antidot Arrays: Signature of Classical Chaos

2000 ◽  
Vol 84 (3) ◽  
pp. 542-545 ◽  
Author(s):  
Oleg Yevtushenko ◽  
Gerd Lütjering ◽  
Dieter Weiss ◽  
Klaus Richter
Keyword(s):  
Weak Localization ◽  
Classical Chaos ◽  
Antidot Arrays

Current distribution in antidot arrays close to the quantum Hall regime

1999 ◽  
Vol 60 (4) ◽  
pp. 2561-2570 ◽  
Author(s):  
Rolf R. Gerhardts ◽  
Johannes Groß
Keyword(s):  
Current Distribution ◽  
Quantum Hall ◽  
Quantum Hall Regime ◽  
Hall Regime ◽  
Antidot Arrays

CLASSICAL DIFFUSION AND QUANTAL LOCALIZATION OF A KICKED PARTICLE IN A WELL

1988 ◽  
Vol 02 (01) ◽  
pp. 103-120 ◽  
Author(s):  
AVRAHAM COHEN ◽  
SHMUEL FISHMAN
Keyword(s):  
Diffusion Coefficient ◽  
Classical Limit ◽  
Approximate Formula ◽  
Quantum Systems ◽  
Potential Well ◽  
Diffusive Growth ◽  
Classical Chaos ◽  
The One ◽  
Short Time ◽  
Infinite Potential Well

The classical and quantal behavior of a particle in an infinite potential well, that is periodically kicked is studied. The kicking potential is K|q|α, where q is the coordinate, while K and α are constants. Classically, it is found that for α > 2 the energy of the particle increases diffusively, for α < 2 it is bounded and for α = 2 the result depends on K. An approximate formula for the diffusion coefficient is presented and compared with numerical results. For quantum systems that are chaotic in the classical limit, diffusive growth of energy takes place for a short time and then it is suppressed by quantal effects. For the systems that are studied in this work the origin of the quantal localization in energy is related to the one of classical chaos.

Exchange bias and its thermal stability in ferromagnetic/antiferromagnetic antidot arrays

2012 ◽  
Vol 101 (1) ◽  
pp. 012407 ◽  
Author(s):  
W. J. Gong ◽  
W. J. Yu ◽  
W. Liu ◽  
S. Guo ◽  
S. Ma ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Exchange Bias ◽  
Antidot Arrays

The domain formation in Fe/Ni/Fe nanoscale magnetic antidot arrays

2012 ◽  
Vol 111 (6) ◽  
pp. 063902 ◽  
Author(s):  
Ruihua Cheng ◽  
A. Rosenberg ◽  
D. N. McIlroy ◽  
Z. Holman ◽  
D. Zhang ◽  
...  
Keyword(s):  
Domain Formation ◽  
Antidot Arrays

scholarly journals Easy axis magnetization reversal in cobalt antidot arrays

2008 ◽  
Vol 103 (7) ◽  
pp. 07D509 ◽  
Author(s):  
E. Mengotti ◽  
L. J. Heyderman ◽  
F. Nolting ◽  
B. R. Craig ◽  
J. N. Chapman ◽  
...  
Keyword(s):  
Magnetization Reversal ◽  
Easy Axis ◽  
Antidot Arrays

scholarly journals Classical Chaos Described by a Density Matrix

Physics ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 739-746
Author(s):  
Andres Mauricio Kowalski ◽  
Angelo Plastino ◽  
Gaspar Gonzalez
Keyword(s):  
Density Matrix ◽  
Pure State ◽  
Classical Limit ◽  
Degrees Of Freedom ◽  
Temporal Evolution ◽  
Entropy Density ◽  
State Density ◽  
Unexpected Result ◽  
Semiclassical Model ◽  
Classical Chaos

In this paper, a reference to the semiclassical model, in which quantum degrees of freedom interact with classical ones, is considered. The classical limit of a maximum-entropy density matrix that describes the temporal evolution of such a system is analyzed. Here, it is analytically shown that, in the classical limit, it is possible to reproduce classical results. An example is classical chaos. This is done by means a pure-state density matrix, a rather unexpected result. It is shown that this is possible only if the quantum part of the system is in a special class of states.

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