Localization, escape rate and delocalization in kinked ratchet potentials
Name
930619527-MIT.pdf
Description
Full printable version
Size
6.59 MB
Format
Adobe PDF
Checksum (MD5)
45fbb7779a2565c4717f08e785f0d3d7
Author(s)
Choi, Sang Hyun
Advisor(s)
Alfredo Alexander-Katz and Jeremy England.
Date Issued
2015
Publisher
Massachusetts Institute of Technology
Abstract
The particle localization in ratchet potentials with segments of reverse directions, or kinked ratchets, is computationally studied. Kinks localize a particle on on-off pulsating ratchet potentials, forming stable points in the effective potential. Analogous Kramers rate for transition between kinks is derived through simulations under different values of parameters defining the system. Adding tilting to the system with a proper choice of tilting frequency induces stochastic resonance. Delocalization of a particle is observed in the resonant activation regime.
Description
Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 45-46).
Subjects
Physics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
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