Despite almost universal belief that particles cannot move faster than light, one can think of negative‐energy particles traveling backward in time whose speed exceeds that of light. Experimenters are looking for these faster‐than‐light particles.
FOR MANY DECADES now the view has prevailed that no particle could possibly travel with a velocity greater than the velocity of light in vacuum, It is generally held that this limitation is a direct consequence of the special theory of relativity. Albert Einstein himself has said so in his original paper on relativity.
This article is only available in PDF format
References
1. O. M. P. Bilaniuk, V. K. Deshpande, E. C. G. Sudarshan, Am. J. Phys. 30, 718 (1962).https://doi.org/AJPIAS
2. Ya. P. Terletskii, Paradoksy teorii otnositelnosti, Nauka Press, Moscow, 1966; English translation: Paradoxes in the Theory of Relativity, Plenum Press, New York (1968).
9. Ya. P. Terletskii, Doklady Akad. Nauk SSSR 133, 329 (1960); https://doi.org/DANKAS English translation: Ya. P. Terletskii, Soviet Physics‐Doklady 5, 784 (1961).
10. T. Alväger, J. Blomqvist, P. Erman, 1963 Annual Report of the Nobel Research Institute, Stockholm (unpublished).
11. T. Alväger, P. Erman, 1965 Annual Report of the Nobel Research Institute, Stockholm (unpublished).
Detecting quantum particles of gravity was long considered hopeless. A new perspective, which takes advantage of quantum technologies, suggests that an experimental realization may be closer than previously thought.
Researchers don’t need to do science engagement alone. Working with professionals makes the job easier and more effective and can lead to better science.
July 14, 2026 03:02 PM
This Content Appeared In
Volume 22, Number 5
Get PT newsletters in your inbox
PT The Week in Physics
A collection of PT's content from the previous week delivered every Monday.
One email per week
PT New Issue Alert
Be notified about the new issue with links to highlights and the full TOC.
One email per month
PT Webinars & White Papers
The latest webinars, white papers and other informational resources.