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In science and especially in mathematical studies, a variational principle is one that enables a problem to be solved using calculus of variations, which concerns finding functions that optimize the values of quantities that depend on those functions. For example, the problem of determining the shape of a hanging chain suspended at both ends—a catenary—can be solved using variational calculus, and in this case, the variational principle is the following: The solution is a function that minimizes the gravitational potential energy of the chain.
Ennackal Chandy George Sudarshan was an Indian American theoretical physicist and a professor at the University of Texas. Prof.Sudarshan has been credited with numerous contributions to the field of theoretical physics, including Glauber–Sudarshan P representation, V-A theory, tachyons, quantum Zeno effect, open quantum system and quantum master equations, spin–statistics theorem, non-invariance groups, positive maps of density matrices, and quantum computation.
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Roy Jay Glauber was an American theoretical physicist. He was the Mallinckrodt Professor of Physics at Harvard University and Adjunct Professor of Optical Sciences at the University of Arizona. Born in New York City, he was awarded one half of the 2005 Nobel Prize in Physics "for his contribution to the quantum theory of optical coherence", with the other half shared by John L. Hall and Theodor W. Hänsch. In this work, published in 1963, he created a model for photodetection and explained the fundamental characteristics of different types of light, such as laser light and light from light bulbs. His theories are widely used in the field of quantum optics. In statistical physics he pioneered the study of the dynamics of first-order phase transitions, since he first defined and investigated the stochastic dynamics of an Ising model in a paper published in 1963. He served on the National Advisory Board of the Center for Arms Control and Non-Proliferation, the research arms of Council for a Livable World.
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The Feynman Lectures on Physics is a physics textbook based on some lectures by Richard Feynman, a Nobel laureate who has sometimes been called "The Great Explainer". The lectures were presented before undergraduate students at the California Institute of Technology (Caltech), during 1961–1963. The book's co-authors are Feynman, Robert B. Leighton, and Matthew Sands.
Rajiah Simon is a professor of physics at the Institute of Mathematical Sciences, Chennai, India.
Hamilton's optico-mechanical analogy is a conceptual parallel between trajectories in classical mechanics and wavefronts in optics, introduced by William Rowan Hamilton around 1831. It may be viewed as linking Huygens' principle of optics with Maupertuis' principle of mechanics.
References
- 1 2 "Brief Resume - Prof. N. Mukunda" (PDF). ICAST. Archived from the original on 24 June 2017. Retrieved 19 May 2019.
{{cite web}}: CS1 maint: unfit URL (link) - ↑ Narasimhaigar Mukunda (1964) Studies in Hamiltonian theories of relativistic interacting particles, and in the application of symmetry groups to elementary particle physics, Seventh supplement to Checklist of Doctors’ Theses from University of Rochester
- ↑ "Physics Department, IISER Bhopal". Archived from the original on 22 September 2022. Retrieved 25 April 2021.
- ↑ Faculty at Ramakrishna Mission
- ↑ Handbook of Shanti Swarup Bhatnagar Prize Winners (1958 - 1998) (PDF). Council of Scientific & Industrial Research, New Delhi. 1999. Archived from the original (PDF) on 4 March 2016. Retrieved 11 April 2012.
- ↑ VGK Memorial Lecture Series from Tata Institute of Fundamental Research
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