Home Page of Tejinder Pal Singh
Affiliation  Research  CV  Publications  Students  Awards  Teaching  Popular Science  Schooling
 Affiliation:
 Department of Astronomy and Astrophysics
 Tata Institute of Fundamental Research
 Homi Bhabha Road
 Mumbai 400005
 India
 Designation : Professor
 Email : tpsingh at tifr.res.in
 Tel: +912222782600 (Office): +912222783160 (Residence)
 Research Interests :
 Quantum Gravity; Quantum Measurement Problem and Foundations of Quantum Mechanics; Gravitation Theories with Torsion; Cosmology  The Origin of Cosmic Acceleration and Dark Energy, The Cosmological Constant Problem and the Large Scale Structure of the Universe; Gravitational Collapse and Cosmic Censorship.
 RECENT ARTICLES:
 Spacetime from collapse of the wavefunction: Article, Blog Post
 Testing the Limits of Quantum Mechanics Article, TIFR Colloquium
 Space and time as a consequence of GRW quantum jumps
 Testing spontaneous collapse through bulk heating experiments
 Quantum theory and the structure of spacetime
 Comment on `A Universe that does not know the time'
 Research In Brief :
 The quantum measurement problem: what is the explanation for the apparent collapse of the wave function during a quantum measurement? What is the origin of the Born probability rule?
 The concept of time is a classical concept, external to quantum mechanics. There ought to exist a reformulation of quantum mechanics which does not refer to an external classical time. Such a reformulation can be shown to be the limiting case of a nonlinear quantum theory, with the nonlinearity becoming important at the Planck mass/energy scale. The nonlinearity can possibly explain the collapse of the wavefunction during a quantum measurement, and predicts a finite superposition lifetime for superposed states of mesoscopic quantum systems. These ideas could be tested by ongoing laboratory experiments in the near future. [Ref. arXiv:0711.3773 and Reviews of Modern Physics 85, 471 (2013) arXiv:1204.4325]
 We do not understand what is causing the Universe to undergo an accelerated expansion today. The simplest explanation, namely that this is an apparent effect resulting from averaging of inhomogeneities, does not seem to work [Paranjape and Singh, Phys. Rev. Lett. 101, 181101 (2008)]. Could the acceleration be an apparent effect because we live in a huge void? Could it be due to a very tiny cosmological constant, whose extremely small but non zero value can be derived from quantum gravity?
 Classical general relativity seems to admit the formation of naked singularities. What are the possible astrophysical signatures of such naked singularities, if any?
 CV: Detailed CV
 Date of Birth : 23rd July, 1962
 Masters in Physics [Five Year Integrated Programme] : IIT, Delhi (19791984)
 Ph. D. in Physics : TIFR, Mumbai (19841989)
 PostDoctoral Fellow at ICTP, Trieste : 198990
 Faculty Member at TIFR since 1989
 List of Publications :
 PDF file
 Link to Spires Database
 Link to Google Scholar
 Graduate Student(s):
 Srimanta Banerjee
 Sayantani Bera
 Shreya Banerjee
 Past Graduate Students :
 Priti Mishra [Faculty, Patna University]
 Kinjalk Lochan [DSTINSPIRE Faculty, IISER Mohali]
 Aseem Paranjape [The Jurgen Ehlers Thesis Prize 2013 from International Society of General Relativity and Gravitation; Faculty, IUCAA, Pune]
 Rakesh Tibrewala [Faculty, LNMIIT, Jaipur ]
 Sashideep Gutti [Faculty, BITS Hyderabad]
 Sukratu Barve [Faculty, Univ. of Pune]
 Awards and Recognition :
 CBSE HSC Examination (1977) : AllIndia Rank 11
 CBSE Senior Secondary Examination [1979] : AllIndia Rank 3
 IIT Delhi Silver Medal [1984]
 Gravity Research Foundation [USA] Essay Contest :
 3rd Prize (1998)
 4th Prize (2004) [jointly with Cenalo Vaz, Cincinnati]
 2nd Prize (2008)
 Center for Excellence Visiting Scholar, Yukawa Institute for Theoretical Physics, Kyoto [Aug.Oct. 2000]
 Fourth Prize in 2009 Essay Contest of the Foundational Questions Institute (USA)
 4th Prize in FQXi essay contest 2011
 4th Prize in FQXi essay contest 2012, jointly with Angelo Bassi and Hendrik Ulbricht
 2nd Prize in FQXi essay contest 2013, jointly with Angelo Bassi and Saikat Ghosh
 3rd Prize in FQXi eessay contest 2014
 Creative Thinking Prize in FQXi essay contest 2015, jointly with Anshu Gupta Mujumdar
 4th Prize in FQXi essay contest 2018

 John Templeton Foundation project grant for research on `Quantum physics and the nature of reality' [20112013]
 Coinvestigator: John Templeton Foundation project grant for research on 'Experimental and theoretical exploration of fundamental limits of quantum mechanics' PI: Hendrik Ulbricht (Southampton), Coinvestigator: Angelo Bassi (Trieste) 20132016
 Member, Foundational Questions Institute, USA
 Teaching [Graduate Courses at TIFR]:
 Classical Electrodynamics [1993]
 Astronomy and Astrophysics [1995]
 Classical Electrodynamics [1998]
 Statistical Mechanics [2001]
 Classical Mechanics [2003]
 Statistical Mechanics [2009]
 General Relativity and Cosmology [2013]
 Some Popular Science Articles / Podcast / Youtube Video:
 Special Relativity for the SchoolGoing Child
 Quantum theory and the Cosmological Constant
 Quantum theory, gravity, and the standard model of particle physics
 FQXi Lecture 'Quantum measurement and quantum gravity'
 FQXI Podcast: Testing the quantum limits
 YouTube Video: Does Nature Play Dice?
 Schooling :
 Kendriya Vidyalaya No. 1, Ambala Cantonment, 197579
 Kendriya Vidyalaya, BHU Varanasi, 197475
 Kendriya Vidayala, Babina Cantonment, 197374
 Shalini Preparatory School, Clement Town, Dehradun, 196972