Author: Ramaswamy JAGANNATHAN
Bio: Dr. Ramaswamy Jagannathan is presently the Adjunct Professor of Physics
Chennai Mathematical Institute.  Most of his carrier was the The Institute of Mathematical Sciences (MATSCIENCE/IMSc)

Ramaswamy Jagannathan did MSc in Physics from the University of Madras in 1971.
He did PhD under the supervision of Alladi Ramakrishnan, the Founder-Director of  The Institute of Mathematical Sciences (MATSCIENCE/IMSc).  For his Doctoral Work, he received the Governor-Chancellor's Centenary Prize Gold Medal 
for 1976 (Award for the Best Thesis in Science).  

Jagannathan and collaborators initiated the "Quantum theory of charged-particle beam optics", by working out the focusing action of a magnetic quadrupole using the Dirac Equation.  

R. Jagannathan, R. Simon, E. C. G. Sudarshan and N. Mukunda,
Quantum theory of magnetic electron lenses based on the Dirac equation,
Physics Letters A, 134, 457-464 (1989), 
http://dx.doi.org/10.1016/0375-9601(89)90685-3

R. Jagannathan,
Quantum theory of electron lenses based on the Dirac equation,
Physical Review A, 42, 6674-6689 (1990).
http://dx.doi.org/10.1103/PhysRevA.42.6674

R. Jagannathan and S. A. Khan,
Quantum theory of the optics of charged particles,
Advances in Imaging and Electron Physics,
Editors: Peter W. Hawkes, B. Kazan and T. Mulvey,
(Academic Press, Logo, San Diego, 1996), Vol. 97, 257-358 (1996).
http://dx.doi.org/10.1016/S1076-5670(08)70096-X

Sameen Ahmed Khan,
Quantum theory of charged-particle beam optics,
PhD Thesis, The Institute of Mathematical Sciences (MATSCIENCE/IMSc), 
181 pages (1997).  Thesis Supervisor: Professor Ramaswamy JAGANNATHAN. 
http://www.imsc.res.in/xmlui/handle/123456789/75 and 
http://sameenahmedkhan.webs.com/thesis-quantum-theory-of-charged-particle-beam-optics.html