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: +91-22-22782600 (Office): +91-22-22783160 (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, VIDEO LECTURES:
Thinking about Quantum Gravity: YouTube Video Lecture Series Video#1 Playlist
Outline for a quantum theory of gravity
Space-time from collapse of the wave-function: 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 space-time
Comment on `A Universe that does not know the time'

CURRENT RESEARCH (2019): THE CONNECTION BETWEEN QUANTUM FOUNDATIONS AND QUANTUM GRAVITY
I am currently working on the deep theoretical connection between quantum foundations, and the sought for quantum theory of gravity. And I collaborate with experimentalists to test these ideas in the laboratory, and in the cosmological setting, as also in the context of black hole physics. Quantum theory, despite being extremely successful and agreeing with every experiment to date, poses difficult unresolved conceptual issues: the nature of the quantum-to-classical transition, the absence of position superpositions in the macroscopic world, quantum non-locality, and the problem of time in quantum theory. I have argued that addressing these issues points us towards the sought for quantum theory of gravity. Some of these issues have been addressed by spontaneous collapse theories, which provide a unified description of classical and quantum dynamics, by suggesting that the principle of quantum linear superposition is approximate, not exact. These theories are falsifiable, and are currently being tested in the laboratory. We have shown that the resolution of the problem of time in quantum theory guides us towards quantum gravity, and spontaneous localisation plays an important role in bridging the quantum gravitational world and the classical one. We have predicted the intriguing phenomenon of quantum interference in time, and spontaneous collapse in time - these are in principle testable in the laboratory, and constitute a test of quantum gravity. These ideas also seem to have important implications for black hole physics and cosmology, which are currently being investigated. You can get more information on these works from the articles listed above, and from my ongoing YouTube video lecture series `Thinking about Quantum Gravity’.
CV: Detailed CV
Date of Birth : 23rd July, 1962
Masters in Physics [Five Year Integrated Programme] : IIT, Delhi (1979-1984)
Ph. D. in Physics : TIFR, Mumbai (1984-1989)
Post-Doctoral Fellow at ICTP, Trieste : 1989-90
Faculty Member at TIFR since 1989
List of Publications :
PDF file
Link to Spires Database
Link to Google Scholar
Graduate Student(s):
Srimanta Banerjee
Past Graduate Students :
Sayantani Bera (post-doc, IUCAA, Pune)
Shreya Banerjee (post-doc, Ben Gurion University, Israel)
Priti Mishra [Faculty, Patna University]
Kinjalk Lochan [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) : All-India Rank 11
CBSE Senior Secondary Examination [1979] : All-India 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' [2011-2013]

Co-investigator: John Templeton Foundation project grant for research on 'Experimental and theoretical exploration of fundamental limits of quantum mechanics' PI: Hendrik Ulbricht (Southampton), Co-investigator: Angelo Bassi (Trieste) 2013-2016

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 School-Going 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, 1975-79
Kendriya Vidyalaya, BHU Varanasi, 1974-75
Kendriya Vidayala, Babina Cantonment, 1973-74
Shalini Preparatory School, Clement Town, Dehradun, 1969-72