Faculty

Prof. C. S. Unnikrishnan

Department of Physics, TIFR, Mumbai
Fundamental Interations Lab, TIFR, India

Publications

  • Limit on the strength of Intermediate Range forces coupling to isospin, R. Cowsik, N.Krishnan, S. N. Tandon and C. S. Unnikrishnan, Phys. Rev. Lett. 61, 2179, (1988).
  • A satellite-Borne experiment to study the fifth force, R. Cowsik, N.Krishnan, S. N. Tandon C. S. Unnikrishnan and P. Sarawat, Pramana- J. Phys. 32, L303, (1989)
  • Torsion balance experiments for measurement of weak forces in nature, R. Cowsik, N.Krishnan, P. Saraswat, S. N. Tandon, C. S. Unnikrishnan, U. D. Vaishnav. C. Viswanadham and G. P. Puthran, Ind. J. Pure and Appl. Phys. 27, 691, (1989).
  • Strength of Intemediate range forces coupling to isospin, R. Cowsik, N.Krishnan, S. N. Tandon and C. S. Unnikrishnan, Phys. Rev. Lett. 64, 336, (1990).
  • On the anomalous weight reduction in rotating gyroscopes, C. S. Unnikrishnan, Current Science 59, 600, (1990).
  • Search for a fifth force, C. S. Unnikrishnan, Pramana – J. Phys. 41 (supplement), 395, (1993).
  • On naked singularities in spherically symmetric gravitational collapse, C. S. Unnikrishnan, Bull. Astr. Soc. India 21, 413, (1993).
  • Gravitational collapse of inhomogeneous dust: naked singularities, black hole formation and Hawking evaporation, C. S. Unnikrishnan, Bull. Astr. Soc. India 21, 417, (1993).
  • Experimental gravitation in India – progress and challenges, C. S. Unnikrishnan, Classical and Quantum Gravity 11, A195, (1994).
  • Naked singularities in spherically symmetric gravitational collapse – A critique, C. S. Unnikrishnan, General Relativity and Gravitation 26, 665, (1994).
  • Physically motivated proof of the cosmic censorship conjecture, C. S. Unnikrishnan, Phys. Rev. D15, 53, Rapid Comm. R580, (1996).
  • Does a superconductor shield gravity?, C. S. Unnikrishnan, Physica C 266, 133, (1996).
  • Some comments on the two prism tunneling experiment, C. S. Unnikrishnan and Sudha A. Murthy, Phys. Lett. A 221, 1, (1996).
  • Persistent currents and role of whispering gallery modes, C. S. Unnikrishnan, Physica B 223&224, 634, (1996).
  • Comment on ‘Sonoluminescence as quantum vacuum radiation’, C. S. Unnikrishnan and S. Mukhopadhyaya, Phys. Rev. Lett. 77, 4690, (1996).
  • Nuclear Spin dependent parity non-conserving transitions in Ba+ and Ra+, K. P. Geetha, Dilip A. Singh, B. P. Das and C. S. Unnikrishnan, Phys. Rev. A58, Rapid Communications. R16-18, (1998).
  • Do quantum like theories imply observable quantum like effects?, C. S. Unnikrishnan, Current Science 76, 413, (1999).
  • Experimental test of a quantum like theory: Motion of electrons in a uniform magnetic field, in a variable potential well, C. S. Unnikrishnan and C. P. Safvan, Modern Phys. Lett. 14, 479-490, (1999).
  • White light cooling of a He metastable beam, E. Rasel, F. Periera, F. Pavone, F. Perales, C. S. Unnikrishnan, and Michèle Leduc, European Physical Journal D 7, 311, 1999.
  • New limits on the Majorana gravitational shielding from the Zurich G experiment, C. S. Unnikrishnan and G. T. Gillies, Phys. Rev. D 58, Rapid Comm., R16-18, (2000).
  • Popper’s experiment, Signal locality, uncertainty principle and momentum conservation, C. S. Unnikrishnan, Found. Phys. Letters 13, 197, (2000).
  • Origin of complementarity without momentum back-action in atom interferometry experiments, C. S. Unnikrishnan, Phys. Rev. A 62, 015601, (2000).
  • Resolution of nonlocality puzzle in EPR paradox, C. S. Unnikrishnan, Current Science 79, 195, (2000).
  • Quantum correlations from wave-particle unity and locality: Resolution of EPR puzzle, C. S. Unnikrishnan, Annales de la Fondation L. de Broglie (Paris) 25, 363 (2000).
  • Anomalous gravity data during 1997 total solar eclipse do not support hypothesis of gravitational shielding, C. S. Unnikrishnan, A. K. Mohapatra, and G. T. Gillies, Phys. Rev. D 63, 062002, (2001).
  • A unified view of Aharonov-Bohm like phases and some applications, C. S. Unnikrishnan, Pramana 56, 321, (2001).
  • The accelero-magnetic field, Thomas precession and an equivalence principle for the spin, C. S. Unnikrishnan, Mod. Phys. Lett. A 16, 429, (2001).
  • Effcient magneto-optical trapping of a metastable Helium gas, F. Pereira Dos Santos, F. Perales, J. Léonard, A. Sinatra, Junmin Wang, F. Saverio Pavone, E. Rasel, C. S. Unnikrishnan, and Michèle Leduc, Eur. Phys. J. AP 14, 69 (2001).
  • Penning collisions of laser-cooled metastable Helium atoms, F. Pereira Dos Santos, F. Perales, J. Léonard, A. Sinatra, Junmin Wang, F. Saverio Pavone, E. Rasel, C. S. Unnikrishnan, and Michèle Leduc, Eur. Phys. J. D 14, 15 (2001).
  • Bose-Einstein condensation of metastable Helium, F. Pereira Dos Santos, J. Léonard, Junmin Wang, C. J. Barrelet, F. Perales, E. Rasel, C. S. Unnikrishnan, Michèle Leduc, and C. Cohen-Tannoudji, Phys. Rev. Lett. 86, 3459 (2001).
  • Do leptons generate gravity? C. S. Unnikrishnan and G. T. Gillies, Gravitation and Cosmology 7, 251, (2001).
  • Do leptons generate gravity? First constraints from laboratory experiments, C. S. Unnikrishnan and G. T. Gillies, Phys. Lett. A. 288, 161, (2001).
  • Quantum correlations from local amplitudes and the resolution of the EPR nonlocality puzzle, C. S. Unnikrishnan, Optics and Spectroscopy 91, 358, (2001).
  • Interaction free measurements of the second kind, C. S.Unnikrishnan, Optics and Spectroscopy 91, 393, (2001).
  • Is the quantum mechanical description of physical reality complete ? Resolution of the EPR puzzle, C. S. Unnikrishnan, Found. Phys. Lett. 15, 1-25 (2002).
  • Equivalence Principle and quantum mechanics : a theme in harmony, C. S. Unnikrishnan, Mod. Phys. Lett. A17, 1081 (2002).
  • Nano-constraints on the spatial anisotropy of the gravitational constant, C. S. Unnikrishnan and G. T. Gillies, Physics Letters A 305, 26 (2002).
  • Production of Bose-Einstein condensate of metastable helium atoms, F. Pereira Dos Santos, J. Leonard, J. Wang, C. J. Barrelet, F. Perales, E. Rasel, C. S. Unnikrishnan, M. Leduc and C. Cohen-Tannoudji, European Physical Jl. D 19, 103 (2002).
  • Proof of absence of spooky action at a distance in quantum correlations, C. S. Unnikrishnan, (Proc. Winter Institute in Foundations of Quantum Mechanics and Quantum Optics) Pramana 59, 295 (2002).
  • Evidence for the quantum birth of our Universe, C. S. Unnikrishnan, G. T. Gillies and R. C. Ritter, (Proc. Winter Institute in Foundations of Quantum Mechanics and Quantum Optics), Pramana 59, 369 (2002).
  • Comment on “Observation of matter wave beat phenomena in the macrodomain” C. S. Unnikrishnan, to appear in Phys. Rev. E (2004)

Books and Proceedings

  • Is sonoluminescence due to dynamic Casimir effect ?, C. S. Unnikrishnan, Proccedings of the 8th Marcell Grossmann meeting, Jerusalem, 1997 (Eds. T. Piran & R. Ruffini, World Scientific, 1999).
  • Gravity and Time Machines, C. S. Unnikrishnan, Proccedings of the 8th Marcell Grossmann meeting, Jerusalem, 1997 (Eds. T. Piran & R. Ruffini, World Scientific, 1999).
  • Possibility of measuring the Scalar gravitational A-B effect in atom interferometers, C. S. Unnikrishnan, Proccedings of the 8th Marcell Grossmann meeting, Jerusalem, 1997 (Ed Eds. T. Piran & R. Ruffini, World Scientific, 1999).
  • High sensitivity measurement of the Casimir Force and observability of Finite temperature effects, R. Cowsik, B. P. Das, N. Krishnan, G. Rajalakshmi, D. Suresh and C. S. Unnikrishnan, Proccedings of the 8th Marcell Grossmann meeting, Jerusalem, 1997 (Eds. T. Piran & R. Ruffini, World Scientific, 1999).
  • The TIFR Equivalence Principle Experiment, R. Cowsik, N. Krishnan, and C. S. Unnikrishnan, Proccedings of the 8th Marcell Grossmann meeting, Jerusalem, 1997 (Eds. T. Piran & R. Ruffini, World Scientific, 1999).
  • Towards a high density source of cold metastable Helium,F. S. Pavone, E. Rasel, F. Perales, C. S. Unnikrishnan, B. Wattellier, F. Elokan, M. Leduc and C. Cohen Tannoudji, 6th EPS conference on Atomic and Molecular Physics, Siena, Italy, 1998.
  • Seeking for high densities of ultracold metastable Helium E. M. Rasel, F. Pavone, F. Perales, C. S. Unnikrishnan, and M. Leduc, , Quantum Optics conference, Castelvechio, Italy, 1998.
  • The Resolution of the Einstein-Podolsky-Rosen Nonlocality Puzzle, C. S. Unnikrishnan, Proceedings of the symposium on Frontiers of Fundamental Physics (World Scientific), Hyderabad, (2000).
  • Constraints on Gravitational shielding, C. S. Unnikrishnan and G. T. Gillies, To appear in edited volume on Le Sage’s gravity theory, Ed. M. Edwards (Apeiron , Montreal, 2001).
  • Gravitational Shielding, G. T. Gillies, and C. S. Unnikrishnan, Proceedings of the Erice workshop on gravity and quantum physics (Eds. V. de Sabbata, Kluwer Academic Publishers, 2001).
  • Quantum-related attempts at measurement and interpretation of the Newtonian gravitational constant G. T. Gillies and C. S. Unnikrishnan, Proceedings of the Erice Workshop on gravity and quantum physics, (Eds. V. de Sabbata, Kluwer Academic Publishers, 2001).
  • Proof of absence of spooky action at a distance in quantum correlations, C. S. Unnikrishnan, Proceedings of the Rajaji meeting, IMSc, (2001).
  • Production of the Bose-Einstein condensate of metastable Helium gas, F. Pereira Dos Santos, J. Léonard, Junmin Wang, C. J. Barrelet, F. Perales, E. Rasel, C. S. Unnikrishnan, Michèle Leduc, and C. Cohen-Tannoudji, Proceedings of the Rochester conference on cold quantum gases (2001).
  • Experimental perspectives on the interplay between quantum and gravity physics, G. T. Gillies and C. S. Unnikrishnan, , in Advances in the Interplay between Quantum and Gravity Physics, pp 103-121, Eds. P. G. Bergmann and V. de Sabbata (Kluwer Academic, Dordrecht, 2002).
  • Quantum physics motivated measurement and interpretation of the Newtonian gravitational constant, G. T. Gillies and C. S. Unnikrishnan, in Advances in the Interplay between Quantum and Gravity Physics, pp 123-131, Eds. P. G. Bergmann and V. de Sabbata (Kluwer Academic, Dordrecht, 2002).
  • Constraints on Gravitational Shielding, C. S. Unnikrishnan and G. T. Gillies, in Pushing Gravity, Ed. M. Edwards (Apeiron, Montreal, 2002).
  • Experiments motivated by the Mach’s Principle: A review with Comments, in Mach’s Principle and Inertia, Eds. M. Sachs and A. R. Roy, (Apeiron, Montreal, 2003).
  • Role of Unobservables in Physics: Science and Beyond, in the Proceedings of the International Conference Science and Beyond (Eds. S. Menon, B. V. Sreekantan, A. Sinha, P. Clayton and R. Narasimha, NIAS, 2003).
  • A Rational Critique of Standard Quantum Theory: Overview, Popper’s trail and New Results, C. S. Unnikrishnan, in Philosophical Consciousness and Scientific Knowledge: Conceptual Linkages and Civilizational Background, Ed. D. P. Chattopadhyaya, (PHISPC, New Delhi, 2004)
  • The Role of Unobservables in Modern Physics and Our Links to the Physical Universe, C. S. Unnikrishnan, To appear in “Traditions of Science: Cross Cultural Perspectives”, Ed. Purushottam Bilimoria, 2004.
  • The Newtonian Gravitational Constant: Present Status and Directions for Future Research, G. T. Gillies and C. S. Unnikrishnan, in Generalized gravitation theories and experiment, Eds. V. de Sabbata, V. I. Melnikov and G. T. Gillies (Kluwer Academic, Dordrecht, 2004)
  • The Interface of Gravity and Quantum Mechanics, C. S. Unnikrishnan, in Generalized gravitation theories and experiment, Eds. V. de Sabbata, V. I. Melnikov and G. T. Gillies (Kluwer Academic, Dordrecht, 2004)

Book Reviews

  • Genetics and Consciousness, Current Science 85, 1226 (2003).

Preprints 2004:

  • Cosmic Relativity: The Fundamental Theory of Relativity, its Implications, and Experimental Tests, C. S. Unnikrishnan, gr-qc/0406023
  • Spin-Statistics connection and the gravity of the Universe: The Cosmic connection, gr-qc/0406043
  • On the gravitational deflection of light and particles, C. S. Unnikrishnan (Submitted for publication, 2004).
  • Casimir Energy Density at Planck Time: Solution to the Cosmological Dark Energy Problems?, C. S. Unnikrishnan, gr-qc/0406056
  • Correlation functions, Bell’s inequalities and the fundamental conservation laws, quant-ph/0407041
  • On the Claim of the Observation of ‘Macro-quantum effects’ of Magnetic Vector Potential in the Classical Domain, quant-ph/0408023
  • Contemplations on our links to the Universe – Searching and finding the hidden harmony, C. S. Unnikrishnan, Invited talk at the Melilla Symposium, to be published (Festival of 5 Cultures, Melilla, July 2004).
  • History As Guide To Future: Machian Ideas In Gravitational Physics And Its Experimental Evidences, C. S. Unnikrishnan, 3 Lectures at School on Cosmology and Gravitation, Ettore Majorana Centre, Erice, Sicily, 2004), to appear in the proceedings.
  • The Electrical Neutrality of Atoms and of Bulk Matter, C. S. Unnikrishnan and G. T. Gillies, Review article to appear in Metrologia (2004).
  • New measurements of Casimir Effect in a Torsion Balance Experiment, G. Rajalakshmi, R. Cowsik, D. Suresh and C. S. Unnikrishnan, IIA-TIFR preprint, to be published (2004).
  • Gravito-Electromagnetism: Glimpses of unexplored deep connections, C. S. Unnikrishnan and G. T. Gillies, (Gravity Research Foundation honourable mention, 2004), to appear in Int. Jl. Mod. Phys. D.
  • A simple and inexpensive electronic wavelength-meter using a dual-output photodiode, Sanjukta Roy, Saptarishi Chaudhury and C. S. Unnikrishnan, Am. J. Phys. 73 (6), June 2005.
  • Cosmic Relativity: The Only Consistent Ontological Foundation for The Theory of Space-Time and Relativity, C. S. Unnikrishnan, to appear in the proceedings of the meeting ‘Foundations of Science’, NIAS, Bangalore, 2004 (Ed. B. V. Sreekantan, Publisher: PHISPC, New Delhi).

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