S C Tiwari
S. C. Tiwari | |
|---|---|
| Residence | Varanasi, India |
| Nationality | Indian |
| Known for | Topological model of the photon; the angular-momentum holonomy conjecture; critique of the standard treatment of photon spin |
| Scientific career | |
| Fields | Physicist |
| Institutions | Institute of Natural Philosophy, Varanasi |
Suresh Chandra Tiwari is an Indian theoretical physicist working in Varanasi, whose central concern for more than three decades has been the angular momentum of light — specifically, his contention that the standard treatment of the photon's spin misassigns the energy that goes with it, and that the photon is better understood as a topological object than as a point particle or a plane wave.
He is an unusual figure in this catalogue in that his heterodoxy is conducted almost entirely inside the ordinary journal system. He has some fifty-nine preprints and publications in the Journal of Mathematical Physics, Physica Scripta, Modern Physics Letters A, Journal of Modern Optics, Foundations of Physics Letters and Optik, and has had Comments published in Physical Review Letters twice and in Physical Review A once — the hardest venues in which to be heterodox, since a Comment must survive the authors it criticises.
Career
Tiwari's papers carry the affiliation "Institute of Natural Philosophy, 1 Kusum Kutir, Mahamanapuri, Varanasi" — a private institute of his own founding at a residential address near Banaras Hindu University, rather than an established research body. His own author biography records that he was born in Rajasthan in 1952, took a diploma in advanced physics at the Institute of Physics, Bhubaneswar, in 1977 and a doctorate at the University of Rajasthan in 1980, and has been a visiting professor in the physics department at Banaras Hindu University. Those details rest on his own account and have not been independently confirmed. He remains active, with preprints appearing as recently as 2025.
Photon spin and the angular momentum of light
The energy of spin
Tiwari's core claim is that the energy hν of a photon should not all be assigned to translation. He proposes that it divides into two equal halves: hν/2 of translational energy, carrying linear momentum hν/c, and hν/2 of intrinsic spin energy. The standard treatment, on his account, quietly attributes the whole to translation and then adds spin as a separate label, which is where the trouble in the subject begins.
The photon as a topological object
In place of the point particle he offers a topological photon: a singular vortex, characterised by what he calls an orbifold in space and a tifold in time — topological obstructions rather than a localised lump of energy. He argues that this dissolves wave–particle duality rather than accommodating it, since a vortex is neither. The fullest statement appeared in the Journal of Mathematical Physics in 2008.
Spin versus orbital angular momentum
The orbital angular momentum of light is a large and genuinely active experimental field. Tiwari's position within it is critical and specific: spin angular momentum, he argues, is properly intrinsic, whereas orbital angular momentum is at best quasi-intrinsic, and then only where vortex singularities are present. The widely reported "spin-to-orbital conversion" is, on his reading, really the spin-redirection geometric phase under another name, and the so-called orbital-angular-momentum paradox for rotating beams is an artefact of confusing covariant with contravariant components.
His signature proposal, first made in 1992, is the angular momentum holonomy conjecture: that the geometric phases observed in optics originate physically in the exchange of angular momentum. Restating it in 2024, he remarked that its real import has remained elusive — a fair summary of its reception.
Related work
Tiwari has also proposed reading the imaginary unit as a topological point defect on a directed line, replacing i with a real matrix and recasting the Schrödinger equation in real, topological terms; and he has argued that the fine-structure constant, being the ratio of the electron's charge radius to its Compton wavelength, can be read either as a ratio of two angular momenta or as a ratio of two flux quanta — from which he concludes that electronic charge is itself flux, and ultimately the fractional spin of a quantised vortex. A separate strand treats unimodular relativity and the cosmological constant.
The paper on this wiki
On the Schrödinger Equation appeared in Physics Essays 2(1), 31–35 (1989), and is the earliest of a run of six papers he published in that journal between 1989 and 1996, the last being "A Theory of Gravitation Without the Einstein Field Equation". The 1989 paper is the entry point to his reworking of quantum mechanics, which he developed the following year into a covariant modified Schrödinger equation derived from a variational principle, and returned to as recently as 2023 in Quantum Studies.
Books
- Superluminal Phenomena in Modern Perspective — Faster-Than-Light Signals: Myth or Reality? — Rinton Press, Princeton, 2003, 262 pp. ISBN 1-58949-037-1. Noticed in Physics Today's new-books listing.
- Rebirth of the Electron: Electromagnetism — written in 1997 for the electron's centenary, self-published, 244 pp. Reviewed by E. J. Post in Physics Essays in 1999.
Reception
Tiwari's work has attracted modest but genuine attention: on the order of 250 citations across a career of thirty-five years, with an h-index of about 8. His 2004 paper in the Journal of Modern Optics is cited in the mainstream optics literature, including by groups at the centre of the orbital-angular-momentum field, but he is not part of that field's citation canon and his critiques have not been taken up as a line of research. No published rebuttal of his photon-spin model has been located; like most of the subjects in this catalogue, he has been passed over rather than argued with — though rather less so than most, given the published Comments.
No evidence has been found of any connection to the Natural Philosophy Alliance or CNPS. The likeliest explanation for his presence here is that his 1989 Physics Essays paper was harvested into the paper archive, as many were.
Papers on this wiki
- 1989 – On the Schrödinger Equation — Physics Essays 2(1), 31–35.