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E. C. G. Sudarshan and Symmetry in Classical Dynamics, Optics and Quantum Mechanics

Mukunda, N (2009) E. C. G. Sudarshan and Symmetry in Classical Dynamics, Optics and Quantum Mechanics. In: Conference on Sudarshan: 7 Science Quests, NOV 06-07, 2006, Univ Texas, Austin, TX,.

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Official URL: http://iopscience.iop.org/1742-6596/196/1/012009/


We review work initiated and inspired by Sudarshan in relativistic dynamics, beam optics, partial coherence theory, Wigner distribution methods, multimode quantum optical squeezing, and geometric phases. The 1963 No Interaction Theorem using Dirac's instant form and particle World Line Conditions is recalled. Later attempts to overcome this result exploiting constrained Hamiltonian theory, reformulation of the World Line Conditions and extending Dirac's formalism, are reviewed. Dirac's front form leads to a formulation of Fourier Optics for the Maxwell field, determining the actions of First Order Systems (corresponding to matrices of Sp(2,R) and Sp(4,R)) on polarization in a consistent manner. These groups also help characterize properties and propagation of partially coherent Gaussian Schell Model beams, leading to invariant quality parameters and the new Twist phase. The higher dimensional groups Sp(2n,R) appear in the theory of Wigner distributions and in quantum optics. Elegant criteria for a Gaussian phase space function to be a Wigner distribution, expressions for multimode uncertainty principles and squeezing are described. In geometric phase theory we highlight the use of invariance properties that lead to a kinematical formulation and the important role of Bargmann invariants. Special features of these phases arising from unitary Lie group representations, and a new formulation based on the idea of Null Phase Curves, are presented.

Item Type: Conference Paper
Series.: Journal of Physics Conference Series
Publisher: IOP Publishing ltd
Additional Information: Copyright of this article belongs to IOP Publishing ltd.
Department/Centre: Division of Physical & Mathematical Sciences > Centre for Theoretical Studies (Ceased to exist at the end of 2003)
Date Deposited: 23 Mar 2011 09:34
Last Modified: 23 Mar 2011 09:34
URI: http://eprints.iisc.ac.in/id/eprint/36210

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