“The important thing is to not stop questioning. Curiosity has its own reason for existence. One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend a little of this mystery each day”
Albert Einstein.

Coherent states

Ravinder Puri

WP_20160902_10_49_29_Pro-e1472797435357Prof. Ravinder Rupchand Puri gave his vital contribution as distinguished Guest Professor at Indian Institute of Technology Bombay. Dean at Homi Bhabha National Institute (Deemed University) (2004 – Nov 2012). Head of Human Resource Development Division, Bhabha Atomic Research Centre (2005 – Nov 2012) . Currently he is a visiting faculty at  Indian Institute of Technology,  Gandhinagar.  His areas of research interest  are theoretical Quantum Optics ,foundations of Quantum Mechanics  ,Quantum Information Processing, etc.



Due to its counter-intuitive features, the quantum theory at the time of its birth in 1926 appeared to be, and to many it still is, a strange creature in the classical world. Beginning with the questions probing the meaning of the wavefunction to the interpretation of the physical phenomena, nothing appeared to fit in to the classical frame of mind. Yet the new theory marched ahead on the path paved by experimental findings. It is the answer to the question about the ability of the then new theory to reproduce classical motion that is treated as the seed of the concept of what is now known as the coherent states. The concept of the coherent states though owes its origin to the studies of optical coherence reported in 1963. Here we summarize briefly the genesis and evolution of the concept of coherent states.

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