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Daya Shankar Kulshreshtha

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Daya Shankar Kulshreshtha
240 X 309 102KB
Daya Shankar Kulshreshtha at Delhi University in August 2017
Born (1951-12-05) December 5, 1951 (age 72)
Shivpuri, India
Nationality Indian
Alma materDelhi University
Jiwaji University
Known forQuantum field theory, Light front quantization, Boson stars
Scientific career
FieldsTheoretical Physics
InstitutionsUniversity of Delhi
Doctoral advisorR. P. Saxena (Delhi)

Daya Shankar Kulshreshtha (born December, 1951) is an Indian theoretical physicist, specializing in formal aspects of quantum field theory, string theory, supersymmetry, supergravity and superstring theory, Dirac's instant-form and light-front quantization of field theories and D-brane actions.[1] His work on the models of gravity focuses on the studies of charged compact boson stars and boson shells.[1]

Education and career

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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, under the supervision of R. P. Saxena. He joined the physics department of Rajdhani College, University of Delhi on a permanent teaching position as a lecturer in physics in October 1978. He worked as a postdoctoral researcher at the University of Kaiserslautern (1982–1984). He then held a five-year position of a UGC-Research Scientist of the University Grants Commission (India) at the University of Delhi (1986–1991) followed by a five-year faculty 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.[2][3] He was several times visiting faculty in the Nuclear Theory Group of Iowa State University[4] [5] [6] and in the Field Theory Group of the Institute of Theoretical Physics, University of Oldenburg.[7][8][9][10]

Research

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Kulshreshtha's research focuses on formal aspects of quantum field theory, string theory, supersymmetry, supergravity and superstring theory. In particular, he studies the canonical structure, constrained dynamics and Dirac's instant-form and light-front quantization of field theory, string theory and D-brane actions using the Hamiltonian and path integral formulation and the BRST quantization.[1][11][12] [13] [14] [15] [16] [17] His work on the models of gravity and general relativity, 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.[18][19][20][21][10]

In the early stages of his research, he also worked on the non-relativistic and relativistic Quark model(s).[22][23][24]

Notable collaborators

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Asoke Nath Mitra, Harald J. W. Mueller-Kirsten, James P. Vary, Jutta Kunz, Usha Kulshreshtha, Sanjeev Kumar

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References

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  1. ^ a b c "Shankar Kulshreshtha, Daya - Profile - INSPIRE-HEP". inspirehep.net.
  2. ^ https://www.du.ac.in/du/uploads/Faculty%20Profiles/2017/Physics/Dec2016_Physics_D.S.kulshreshtha.pdf
  3. ^ https://www.du.ac.in/du/uploads/departments/faculty_members/Physics_Astrophysics/2884.pdf
  4. ^ Kulshreshtha, U.; Kulshreshtha, D.S.; Vary, James P.; Sharma, Lalit Kumar (2014). "Light-Front BRST Quantization of the Vector Schwinger Model with a Photon Mass Term". International Journal of Theoretical Physics. 53 (12): 4230–4243. Bibcode:2014IJTP...53.4230K. doi:10.1007/s10773-014-2174-x. S2CID 254573975.
  5. ^ Kulshreshtha, U.; Kulshreshtha, D.S.; Vary, James P. (2015). "Hamiltonian, Path Integral and BRST Formulations of Large N Scalar $QCD_{2}$ on the Light Front and Spontaneous Symmetry Breaking". European Physical Journal C. 75 (4): 174. arXiv:1503.06177. doi:10.1140/epjc/s10052-015-3377-x. S2CID 119102254.
  6. ^ Kulshreshtha, U.; Kulshreshtha, D.S.; Vary, James P. (2016). "Hamiltonian, Path Integral and BRST Formulations of the Vector Schwinger Model with a Photon Mass Term with Faddeevian Regularization". International Journal of Theoretical Physics. 55 (1): 338–360. Bibcode:2016IJTP...55..338K. doi:10.1007/s10773-015-2665-4. S2CID 254580328.
  7. ^ https://www.models-of-gravity.org/participants/visiting-scientists.html
  8. ^ Kumar, S.; Kulshreshtha, U.; Kulshreshtha, D.S.; Kahlen, S.; Kunz, J. (2017). "Some new results on charged compact boson stars". Physics Letters B. 772: 615–620. arXiv:1709.09445. Bibcode:2017PhLB..772..615K. doi:10.1016/j.physletb.2017.07.041. S2CID 119375441.
  9. ^ Kumar, S.; Kulshreshtha, U.; Kulshreshtha, D.S.; Kunz, J. (2019). "Phase Diagrams of Charged Compact Boson Stars". European Physical Journal C. 79 (6): 496. arXiv:1906.00520. Bibcode:2019EPJC...79..496K. doi:10.1140/epjc/s10052-019-7006-y. S2CID 173991196.
  10. ^ a b Kumar, S.; Kulshreshtha, U.; Kulshreshtha, D.S.; Kunz, J. (2020). "Boson Stars and QCD Boson Stars". Proceedings of Science. LC2019: 054. arXiv:2001.03745. doi:10.22323/1.374.0054.
  11. ^ Kulshreshtha, U.; Kulshreshtha, D.S.; Mueller-Kirsten, Harald J.W. (1991). "Quantization of systems with constraints: The Faddeev–Jackiw method versus Dirac's method applied to superfields". Physical Review D. 43 (10): 3376–3383. Bibcode:1991PhRvD..43.3376K. doi:10.1103/PhysRevD.43.3376. PMID 10013289.
  12. ^ Kulshreshtha, U.; Kulshreshtha, D.S.; Mueller-Kirsten, Harald J.W. (1993). "Gauge invariant O(N) nonlinear sigma model(s) and gauge invariant Klein-Gordon theory: Wess-Zumino terms and Hamiltonian and BRST formulations". Helvetica Physica Acta. 66: 752–794.
  13. ^ Kulshreshtha, U.; Kulshreshtha, D.S. (2003). "Conformally gauge-fixed Polyakov D1-brane action in the presence of a 2-form gauge field: The instant-form and front-form Hamiltonian and path integral formulations". Physics Letters B. 555 (3–4): 255–263. doi:10.1016/S0370-2693(03)00056-X.
  14. ^ Kulshreshtha, U.; Kulshreshtha, D.S. (2003). "Hamiltonian and path integral formulations of the Dirac-Born-Infeld-Nambu-Goto D1 brane action with and without a dilation field under gauge-fixing". European Physical Journal C. 29 (3): 453–461. Bibcode:2003EPJC...29..453K. doi:10.1140/epjc/s2003-01239-8. S2CID 121554325.
  15. ^ Kulshreshtha, U.; Kulshreshtha, D.S.; Mueller-Kirsten, Harald J.W.; Vary, James P. (2009). "Hamiltonian, path integral and BRST formulations of the Chern-Simons-Higgs theory under appropriate gauge fixing". Physica Scripta. 79 (4): 045001. Bibcode:2009PhyS...79d5001K. doi:10.1088/0031-8949/79/04/045001. S2CID 120594654.
  16. ^ Kulshreshtha, D.S.; Kulshreshtha, U. (2020). "Role of Light-Front Coordinates in String Theory". Proceedings of Science. LC2019 (2020): 055. doi:10.22323/1.374.0055.
  17. ^ Kulshreshtha, Daya Shankar; Kulshreshtha, Usha (2022). "On the Wess-Zumino Model: a supersymmetric field theory". Acta Polytechnica. 62 (1): 80–84. doi:10.14311/AP.2022.62.0080.
  18. ^ Kumar, S.; Kulshreshtha, U.; Kulshreshtha, D.S. (2014). "Boson stars in a theory of complex scalar fields coupled to the U(1) gauge field and gravity". Classical and Quantum Gravity. 31 (16): 167001. arXiv:1605.07210. Bibcode:2014CQGra..31p7001K. doi:10.1088/0264-9381/31/16/167001. S2CID 118517206.
  19. ^ Kumar, S.; Kulshreshtha, U.; Kulshreshtha, D.S. (2015). "Boson stars in a theory of complex scalar field coupled to gravity". General Relativity and Gravitation. 47 (7): 76. arXiv:1605.07015. Bibcode:2015GReGr..47...76K. doi:10.1007/s10714-015-1918-0. S2CID 254500998.
  20. ^ Kumar, S.; Kulshreshtha, U.; Kulshreshtha, D.S. (2016). "Charged compact boson stars and shells in the presence of a cosmological constant". Physical Review D. 93 (10): 101501. arXiv:1605.02925. Bibcode:2016PhRvD..93j1501K. doi:10.1103/PhysRevD.93.101501. S2CID 118474697.
  21. ^ Kumar, S.; Kulshreshtha, U.; Kulshreshtha, D.S. (2016). "Charged compact boson stars and shells in the presence of a cosmological constant". Physical Review D. 94 (12): 125023. arXiv:1709.09449. Bibcode:2016PhRvD..94l5023K. doi:10.1103/PhysRevD.94.125023. S2CID 54590086.
  22. ^ Kulshreshtha, D. S.; Mitra, A. N. (1988-03-01). "Null-plane formulation of Bethe-Salpeter qqq dynamics: Baryon mass spectra". Physical Review D. 37 (5). American Physical Society (APS): 1268–1278. Bibcode:1988PhRvD..37.1268K. doi:10.1103/physrevd.37.1268. ISSN 0556-2821. PMID 9958806.
    Kulshreshtha, D. S.; Mitra, A. N. (1988-11-01). "Erratum: null-plane formulation of bethe-salpeter qqq dynamics: baryon mass spectra". Physical Review D. 38 (9). American Physical Society (APS): 2913. doi:10.1103/physrevd.38.2913.2. ISSN 0556-2821. PMID 9971981.
  23. ^ Kulshreshtha, D. S.; Mitra, A. N.; Santhanam, I. (1982-12-01). "Strange-baryon spectroscopy through Bethe-Salpeter approach under harmonic confinement". Physical Review D. 26 (11). American Physical Society (APS): 3131–3140. Bibcode:1982PhRvD..26.3131K. doi:10.1103/physrevd.26.3131. ISSN 0556-2821.
  24. ^ Mitra, A. N.; Kulshreshtha, D. S. (1982-12-01). "Bethe-Salpeter qq¯ dynamics under harmonic confinement". Physical Review D. 26 (11). American Physical Society (APS): 3123–3130. Bibcode:1982PhRvD..26.3123M. doi:10.1103/physrevd.26.3123. ISSN 0556-2821.
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