Skip to main content Accessibility help
×
Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-22T21:07:23.096Z Has data issue: false hasContentIssue false

Surfaces of locally minimal flux

Published online by Cambridge University Press:  10 May 2024

Albert Fathi
Affiliation:
Georgia Institute of Technology
Philip J. Morrison
Affiliation:
University of Texas, Austin
Tere M-Seara
Affiliation:
Universitat Politècnica de Catalunya, Barcelona
Sergei Tabachnikov
Affiliation:
Pennsylvania State University
Get access

Summary

For exact area-preserving twist maps, curves were constructed through the gaps of cantori, which were conjectured to have minimal flux subject to passing through the points of the cantorus. It was pointed out by Polterovich (1988) that these curves do not have minimal flux if there coexists a rotational invariant circle of a different rotation number, but if hyperbolic they do have locally minimal flux even without the constraint of passing through the points of the cantorus. Following the criterion of MacKay (1994) for surfaces of locally minimal flux for 3D volume-preserving flows, I revisit this result and show that in general the analogous curves through the points of rotationally ordered periodic orbits or their heteroclinic orbits do not have locally minimal flux. Along the way, various questions are posed. Some results for more degrees of freedom are summarized.

Type
Chapter
Information
Hamiltonian Systems
Dynamics, Analysis, Applications
, pp. 215 - 228
Publisher: Cambridge University Press
Print publication year: 2024

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Baesens, C. and MacKay, R. S., “Cantori for multiharmonic maps”, Phys. D 69:1-2 (1993), 5976.CrossRefGoogle Scholar
Bensimon, D. and Kadanoff, L. P., “Extended chaos and disappearance of KAM trajectories”, Phys. D 13:1-2 (1984), 8289.CrossRefGoogle Scholar
Connor, J., Fukuda, T., Garbet, X., Gormezano, C., Mukhovatov, V., Wakatani, M., the ITB Database Group, the ITPA Topical Group on Transport, and I. B. Physics, “A review of internal transport barrier physics for steady-state operation of tokamaks”, Nuclear Fusion 44:4 (2004), R149.CrossRefGoogle Scholar
Dewar, R. L. and Meiss, J. D., “Flux-minimizing curves for reversible area-preserving maps”, Phys. D 57:3-4 (1992), 476506.CrossRefGoogle Scholar
Dewar, R. L., Hudson, S. R., and Gibson, A. M., “Unified theory of ghost and quadratic-flux-minimizing surfaces”, J. Plasma Fusion Res. 9:5 (2010), 487490.Google Scholar
Dewar, R. L., Hudson, S. R., and Gibson, A. M., “Action-gradient-minimizing pseudo-orbits and almost-invariant tori”, Commun. Nonlinear Sci. Numer. Simul. 17:5 (2012), 20622073.CrossRefGoogle Scholar
Dewar, R. L., Hudson, S. R., and Gibson, A. M., “Generalized action-angle coordinates defined on island chains”, Plasma Phys. Control. Fusion 55:1 (2012), 014004.CrossRefGoogle Scholar
Froyland, G., “Dynamic isoperimetry and the geometry of Lagrangian coherent structures”, Nonlinearity 28:10 (2015), 35873622.CrossRefGoogle Scholar
Golé, C., “Ghost circles for twist maps”, J. Differential Equations 97:1 (1992), 140173.CrossRefGoogle Scholar
Katok, A. and Hasselblatt, B., Introduction to the modern theory of dynamical systems, Encyclopedia of Mathematics and its Applications 54, Cambridge University Press, 1995.Google Scholar
MacKay, R. S., “A renormalisation approach to invariant circles in area-preserving maps”, Phys. D 7:1-3 (1983), 283300.CrossRefGoogle Scholar
MacKay, R. S., “A variational principle for invariant odd-dimensional submanifolds of an energy surface for Hamiltonian systems”, Nonlinearity 4:1 (1991), 155157.CrossRefGoogle Scholar
MacKay, R. S., “Transport in 3D volume-preserving flows”, J. Nonlinear Sci. 4:4 (1994), 329354.CrossRefGoogle Scholar
MacKay, R. S. and Strub, D. C., “Bifurcations of transition states: Morse bifurcations”, Nonlinearity 27:5 (2014), 859895.CrossRefGoogle Scholar
MacKay, R. S., Meiss, J. D., and Percival, I. C., “Transport in Hamiltonian systems”, Phys. D 13:1-2 (1984), 5581.CrossRefGoogle Scholar
MacKay, R. S., Meiss, J. D., and Percival, I. C., “Resonances in area-preserving maps”, Phys. D 27:1-2 (1987), 120.CrossRefGoogle Scholar
Mather, J., “A criterion for the nonexistence of invariant circles”, Inst. Hautes Études Sci. Publ. Math. 63 (1986), 153204.CrossRefGoogle Scholar
Mather, J. N., “Variational construction of orbits of twist diffeomorphisms”, J. Amer. Math. Soc. 4:2 (1991), 207263.CrossRefGoogle Scholar
Milnor, J., Morse theory, Annals of Mathematics Studies 51, Princeton University Press, 1963.Google Scholar
Percival, I. C., “Variational principles for invariant tori and cantori”, pp. 302310 in Nonlinear dynamics and the beam-beam interaction (Sympos., Brookhaven Nat. Lab., New York, 1979), edited by Month, M. and Herrera, J. C., Conf, AIP. Proc. 57, Amer. Inst. Physics, New York, 1980.Google Scholar
Polterovich, L. V., “Transport in dynamical systems”, Uspekhi Mat. Nauk 43:1(259) (1988), 207208. In Russian; translated in Russian Math. Surveys 43:1 (1988), 251252.Google Scholar
Qin, W.-X. and Wang, Y.-N., “Invariant circles and depinning transition”, Ergodic Theory Dynam. Systems 38:2 (2018), 761787.CrossRefGoogle Scholar
Tala, T. and Garbet, X., “Physics of internal transport barriers”, Comptes Rendus Physique 7:6 (2006), 622633.Google Scholar
Wolf, R. C., “Internal transport barriers in tokamak plasmas*”, Plasma Phys. Control. Fusion 45:1 (2002), R1.Google Scholar

Save book to Kindle

To save this book to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

Available formats
×