Rajiah Simon is a Professor at the Institute of Mathematical Sciences, Chennai. His primary interests are in classical and quantum optics, geometric phases, group theoretical techniques and quantum information science.

Quantum information science is a young and vigorously growing area of research which promises enormous potential and opportunities. This article, which will appear in two parts, gives a quantitative description of some of the ideas and techniques fundamental to this discipline. Considerations involving mixed states are reserved for Part 2.

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Address for Correspondence
Rajiah Simon
The Institute of Mathematical Sciences, Chennai 600 113, India.
Email: simon@imsc.ernet.in