A group of physicists has put forward a suggestion that hypothetical particles known as tachions may conform to a special theory of relativity, increasing the likelihood of their existence. Tachions are theoretical particles that are speculated to always travel faster than the speed of light. Despite lacking any empirical evidence of their existence, some physicists argue that tachions could offer theoretical solutions to various challenges in particle and field theory. Referred to as super-light particles, tachions have the potential to surpass the speed of light, potentially disrupting conventional notions of time and space as well as the laws of physics.
This week, a study published in the journal Physical Review D dispelled previous doubts regarding the existence of tachions (source).
In 1905, Einstein formulated the special theory of relativity, which outlines the interplay between space and time. According to this theory, the speed of light represents an ultimate speed limit for material entities, being approachable but unattainable.
Historically, skepticism surrounding the viability of tachions stemmed from various factors. Initial beliefs suggested that the tachy field’s stability was questionable, observers might perceive differing quantities of particles based on their position, and the energy associated with these particles could potentially assume negative values. However, recent investigations have demonstrated that through defining both the initial and final states of a system, concerns related to tachions can be addressed, rendering the tachion theory mathematically coherent.
The research also introduced a novel concept of quantum entanglement that transcends traditional particle theory, postulating that future events can influence present occurrences, an assertion supported by their innovative hypothesis.
In general, the speed of light is an insurmountable constant set at 299,792,458 meters per second. Nevertheless, exceptions exist such as quasi-particles created by electron clouds that exhibit behaviors resembling velocities faster than light.
If extraterrestrial beings have indeed mastered faster-than-light travel, evidence of their technological prowess might manifest in gravitational waves generated by their advancements.
Similar to tachions themselves, this research is inherently speculative, underscoring