Daya Shankar Kulshreshtha (born December, 1951) is an Indian theoretical physicist, specializing in formal aspects of quantum field theory, string theory, supersymmetry,

supergravity In theoretical physics, supergravity (supergravity theory; SUGRA for short) is a modern field theory that combines the principles of supersymmetry and general relativity; this is in contrast to non-gravitational supersymmetric theories such as ...

and

superstring theory Superstring theory is an attempt to explain all of the particles and fundamental forces of nature in one theory by modeling them as vibrations of tiny supersymmetric strings. 'Superstring theory' is a shorthand for supersymmetric string t ...

, Dirac's instant-form and light-front quantization of field theories and

D-brane In string theory, D-branes, short for ''Dirichlet membrane'', are a class of extended objects upon which open strings can end with Dirichlet boundary conditions, after which they are named. D-branes were discovered by Jin Dai, Leigh, and Polch ...

actions. His work on the models of gravity focuses on the studies of charged compact boson stars and boson shells.

Education and career

Kulshreshtha obtained B.Sc. (1969) and M.Sc. (1971) degrees from Jiwaji University, Gwalior. He received his Ph.D. in 1979 from the

University of Delhi Delhi University (DU), formally the University of Delhi, is a collegiate university, collegiate Central university (India), central university located in New Delhi, India. It was founded in 1922 by an Act of the Central Legislative Assembly and ...

, under the supervision of R. P. Saxena. He worked as a postdoctoral researcher at the

University of Kaiserslautern Technical University of Kaiserslautern (German: ''Technische Universität Kaiserslautern'', also known as TU Kaiserslautern or TUK) is a public research university in Kaiserslautern, Germany. There are numerous institutes around the university, ...

(1982–1984). He then held a five-year position of a UGC-Research Scientist of the University Grants Commission of India at the University of Delhi (1986–1991) followed by a five-year position at the University of Kaiserslautern, Germany (1990–1994) before being appointed a professor at the University of Delhi in 1994. He was head of the department of the Department of Physics and Astrophysics, University of Delhi for a period of three years during November 2007 - November 2010.https://www.du.ac.in/du/uploads/Faculty%20Profiles/2017/Physics/Dec2016_Physics_D.S.kulshreshtha.pdfhttps://www.du.ac.in/du/uploads/departments/faculty_members/Physics_Astrophysics/2884.pdf He was several times visiting faculty in the Nuclear Theory Group of

Iowa State University Iowa State University of Science and Technology (Iowa State University, Iowa State, or ISU) is a public land-grant research university in Ames, Iowa. Founded in 1858 as the Iowa Agricultural College and Model Farm, Iowa State became one of the ...

and in the Field Theory Group of the Institute of Theoretical Physics,

University of Oldenburg The Carl von Ossietzky University of Oldenburg (german: Carl von Ossietzky Universität Oldenburg) is a university located in Oldenburg, Germany. It is one of the most important and highly regarded educational facilities in northwestern German ...

.https://www.models-of-gravity.org/participants/visiting-scientists.html

Research

Kulshreshtha's research focuses on formal aspects of quantum field theory, string theory, supersymmetry,

and

. In particular, he studies the canonical structure, constrained dynamics and Dirac's instant-form and light-front quantization of field theory, string theory and

actions using the Hamiltonian and

path integral formulation The path integral formulation is a description in quantum mechanics that generalizes the action principle of classical mechanics. It replaces the classical notion of a single, unique classical trajectory for a system with a sum, or functional i ...

and the BRST quantization. His work on the models of gravity and

general relativity General relativity, also known as the general theory of relativity and Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics ...

, focuses on the studies of charged compact boson stars and boson shells. This work suggests that an infinite sequence of bifurcation points exists in the phase diagrams of such boson stars.

External links

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References

{{DEFAULTSORT:Kulshreshtha, Daya Shankar Living people 1951 births