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Surajit Sen

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Surajit Sen (born November 28, 1960 in Calcutta (modern name Kolkata) in India) is a physicist who works on theoretical and computational problems in non-equilibrium statistical physics and in nonlinear dynamics of many body systems. He holds a Ph.D in physics from The University of Georgia (1990) where he studied with M. Howard Lee. He is also interested in applying physics to study problems of relevance in a societal context. He is a professor of physics at the State University of New York, Buffalo.[1]

Sen is credited with developing an exact solution for the Heisenberg equation of motion in a quantum mechanical many body system in 1991.[2] His studies include work on how solitary waves travel in alignments of elastic beads,[3] on how they interact with one another and how these systems[4][5][6] tend to reach an equilibrium-like state where equipartitioning of energy is not respected, which he called the quasi-equilibrium state.[7] Suggestion of a similar state was made soon thereafter by Berges et al.[8] Recently, Neyenhuis et al[9] may have found some experimental evidence of this quasi-equilibrium/prethermalization state.

Recently, his group has also shown how the energy equipartitioned state may in fact be realized in these systems.[10] In 1997, he investigated the possible use of sound bursts in detecting buried small landmines.[11][12][13] In 2001, he introduced the tapered granular chain impact dispersion system,[14] which has since been extensively probed.[15][16][17][18] Sen has recently suggested that nonlinear systems may be used to extract mechanical energy from noisy environments and make them into useful energy.[19] Sen's group has used cellular automata based simulations to model land battles between an insurgent army and an intelligent army[20] and used molecular dynamics based simulations to examine the social structure of chimpanzee colonies.[21]

Sen was elected as a Fellow[22] of the American Physical Society[23] in 2008,[24] for the discovery of how solitary waves break and secondary solitary waves form in granular media, for his leadership in organizing forums to represent and recognize the physicists from India and for raising consciousness about the problems and the importance of rural science education in India and the developing world. He was also elected as a Fellow of the American Association for the Advancement of Science in 2012[25] for pioneering research on solitary waves and their collisions in granular media and for sustained outstanding service and leadership in international physics.[26]

References

  1. ^ "Welcome to the University at Buffalo - University at Buffalo". www.buffalo.edu. Retrieved 2017-06-22.
  2. ^ Sen, Surajit (1991-10-01). "Exact solution of the Heisenberg equation of motion for the surface spin in a semi-infinite S=1/2 XY chain at infinite temperatures". Physical Review B. 44 (14): 7444–7450. Bibcode:1991PhRvB..44.7444S. doi:10.1103/PhysRevB.44.7444. PMID 9998658.
  3. ^ Sen, Surajit; Manciu, Marian; Wright, James D. (1998-02-01). "Solitonlike pulses in perturbed and driven Hertzian chains and their possible applications in detecting buried impurities". Physical Review E. 57 (2): 2386–2397. Bibcode:1998PhRvE..57.2386S. doi:10.1103/PhysRevE.57.2386.
  4. ^ Manciu, Marian; Sen, Surajit; Hurd, Alan J. (2000-12-27). "Crossing of identical solitary waves in a chain of elastic beads". Physical Review E. 63 (1): 016614. Bibcode:2001PhRvE..63a6614M. doi:10.1103/PhysRevE.63.016614. PMID 11304385.
  5. ^ Manciu, Felicia S.; Sen, Surajit (2002-07-30). "Secondary solitary wave formation in systems with generalized Hertz interactions". Physical Review E. 66 (1): 016616. Bibcode:2002PhRvE..66a6616M. doi:10.1103/PhysRevE.66.016616. PMID 12241509. S2CID 7772700.
  6. ^ "Physicists detect the undetectable: 'baby' solitary waves". Retrieved 2017-06-23.
  7. ^ Sen, Surajit; Krishna Mohan, T. R.; M.M. Pfannes, Jan (2004-10-15). "The quasi-equilibrium phase in nonlinear 1D systems". Physica A: Statistical Mechanics and Its Applications. Proceedings of the VIII Latin American Workshop on Nonlinear Phenomena. 342 (1): 336–343. Bibcode:2004PhyA..342..336S. doi:10.1016/j.physa.2004.04.092.
  8. ^ Berges, J.; Borsányi, Sz.; Wetterich, C. (2004-09-28). "Prethermalization". Physical Review Letters. 93 (14): 142002. arXiv:hep-ph/0403234. Bibcode:2004PhRvL..93n2002B. doi:10.1103/PhysRevLett.93.142002. PMID 15524783.
  9. ^ Neyenhuis, Brian; Zhang, Jiehang; Hess, Paul W.; Smith, Jacob; Lee, Aaron C.; Richerme, Phil; Gong, Zhe-Xuan; Gorshkov, Alexey V.; Monroe, Christopher (2017-08-01). "Observation of prethermalization in long-range interacting spin chains". Science Advances. 3 (8): e1700672. arXiv:1608.00681. Bibcode:2017SciA....3E0672N. doi:10.1126/sciadv.1700672. ISSN 2375-2548. PMC 5573308. PMID 28875166.
  10. ^ Przedborski, Michelle; Sen, Surajit; Harroun, Thad A. (2017-03-06). "Fluctuations in Hertz chains at equilibrium". Physical Review E. 95 (3): 032903. arXiv:1605.08970. Bibcode:2017PhRvE..95c2903P. doi:10.1103/PhysRevE.95.032903. PMID 28415183. S2CID 35302728.
  11. ^ [1], Sen, Surajit & Naughton, Michael J., "System for detection of buried objects" 
  12. ^ "UB RESEARCHERS HOPE SHOCKING WORK LEADS TO WAY TO SOUND OUT LAND MINES". The Buffalo News. 1997-12-07. Retrieved 2017-06-22.
  13. ^ Sen, Surajit; Manciu, Marian; Sinkovits, Robert S.; Hurd, Alan J. (2001-01-01). "Nonlinear acoustics in granular assemblies". Granular Matter. 3 (1–2): 33–39. doi:10.1007/s100350000067. ISSN 1434-5021. S2CID 59062982.
  14. ^ Sen, Surajit; Manciu, Felicia S.; Manciu, Marian (2001-10-15). "Thermalizing an impulse". Physica A: Statistical Mechanics and Its Applications. 299 (3): 551–558. Bibcode:2001PhyA..299..551S. doi:10.1016/S0378-4371(01)00340-5.
  15. ^ Rosas, Alexandre; Lindenberg, Katja (2004-03-31). "Pulse velocity in a granular chain". Physical Review E. 69 (3): 037601. arXiv:cond-mat/0309070. Bibcode:2004PhRvE..69c7601R. doi:10.1103/PhysRevE.69.037601. PMID 15089450. S2CID 38733538.
  16. ^ Nakagawa, Masami; Agui, Juan H.; Wu, David T.; Extramiana, David Vivanco (2003-02-01). "Impulse dispersion in a tapered granular chain". Granular Matter. 4 (4): 167–174. doi:10.1007/s10035-002-0119-1. ISSN 1434-5021. S2CID 120729013.
  17. ^ Doney, Robert L.; Agui, Juan H.; Sen, Surajit (2009-09-15). "Energy partitioning and impulse dispersion in the decorated, tapered, strongly nonlinear granular alignment: A system with many potential applications". Journal of Applied Physics. 106 (6): 064905–064905–13. Bibcode:2009JAP...106f4905D. doi:10.1063/1.3190485. ISSN 0021-8979.
  18. ^ Harbola, Upendra; Rosas, Alexandre; Romero, Aldo H.; Lindenberg, Katja (2010-07-26). "Pulse propagation in randomly decorated chains". Physical Review E. 82 (1): 011306. Bibcode:2010PhRvE..82a1306H. doi:10.1103/PhysRevE.82.011306. PMID 20866610.
  19. ^ "Research Outlines Math Framework That Could Help Convert 'Junk' Energy Into Useful Power | NSF - National Science Foundation". www.nsf.gov. Retrieved 2017-06-23.
  20. ^ Westley, Alexandra; De Meglio, Nicholas; Hager, Rebecca; Mok, Jorge Wu; Shanahan, Linda; Sen, Surajit (2017-03-23). "Study of simple land battles using agent-based modeling: Strategy and emergent phenomena". International Journal of Modern Physics B. 31 (10): 1742002. Bibcode:2017IJMPB..3142002W. doi:10.1142/S0217979217420024. ISSN 0217-9792.
  21. ^ Westley, Matthew; Sen, Surajit; Sinha, Anindya (2014-05-07). Nature's Longest Threads. WORLD SCIENTIFIC. pp. 81–102. doi:10.1142/9789814612470_0009. ISBN 9789814612463.
  22. ^ "APS Fellowship". www.aps.org. Retrieved 2017-04-20.
  23. ^ "APS Fellow Archive". www.aps.org. Retrieved 2017-04-20.
  24. ^ "APS Fellows 2008". www.aps.org. Retrieved 2017-04-20.
  25. ^ "AAAS Members Elected as Fellows". AAAS - The World's Largest General Scientific Society. 2012-11-30. Retrieved 2017-06-22.
  26. ^ Science, American Association for the Advancement of (2012-11-30). "AAAS News and Notes". Science. 338 (6111): 1166–1171. doi:10.1126/science.338.6111.1166. ISSN 0036-8075.


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