Bloch, Anthony and Krishnaprasad, P. S. and Marsden, Jerrold E. and Ratiu, Tudor S. (1996) The EulerPoincare Equations and Double Bracket Dissipation. Communications in Mathematical Physics, 175 (1). pp. 142. ISSN 00103616. http://resolver.caltech.edu/CaltechAUTHORS:20100713150040832

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Abstract
This paper studies the perturbation of a LiePoisson (or, equivalently an EulerPoincare) system by a special dissipation term that has Brockett's double bracket form. We show that a formally unstable equilibrium of the unperturbed system becomes a spectrally and hence nonlinearly unstable equilibrium after the perturbation is added. We also investigate the geometry of this dissipation mechanism and its relation to Rayleigh dissipation functions. This work complements our earlier work (Bloch, Krishnaprasad,Marsden and Ratiu [1991, 1994]) in which we studied the corresponding problem for systems with symmetry with the dissipation added to the internal variables; here it is added directly or Lie algebra variables. The mechanisms discussed here include a number of interesting examples of physical interest such as the LandauLifschitz equations for ferromagnetism, certain models for dissipative rigid body dynamics and geophysical fluids, and certain relative equilibria in plasma physics and stellar dynamics.
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Additional Information:  © 1996. March, 1993; this version, June 4, 1996. Received: 11 January 1994 Revised: 23 November 1994. Communicated by S.T. Yau. We thank Miroslav Grmela, Darryl Holm, Alan Kaufman, Naomi Leonard, Peter Michor, Gloria Sanchez and the referees for helpful suggestions. We also thank the Fields Institute for providing the opportunity to meet in pleasant surroundings during which time some of the ideas in the paper were first worked out. We also thank the Erwin Schrödinger Institute for Mathematical Physics for their hospitality.  
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Record Number:  CaltechAUTHORS:20100713150040832  
Persistent URL:  http://resolver.caltech.edu/CaltechAUTHORS:20100713150040832  
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Deposited By:  Ruth Sustaita  
Deposited On:  04 Aug 2010 17:38  
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