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Classical states; quantum states; pure states; mixed states; superposition principle; density matrix; Bargmann invariants; W igner’s theorem; ray space.

K S Mallesh¹ S Chaturvedi² R Simon³ N Mukunda

1. Department of Studies in Physics University of Mysore Manasagangotri Mysore 570 006
2. School of Physics, University of Hyderabad, Hyderabad 500 046
3. The Institute of Mathematical Sciences, CIT Campus Chennai 600 113.

Published

January 2012