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What are tachyon particles?

They are key in many movies and shows including Journeyman, Star Trek and Fantastic 4, but what are they? Please help!

8 COMMENTS

  1. They are theoretical particles that cannot travel at less than the speed of light.
    There are theoretical reasons for considering that they do exist, but there are also theoretical reasons so suggesst that whether a particle is tardyon (slower than light) or tachyon, it will always appear to that particle that the OTHER side is faster than the speed of light.

  2. A tachyon (from the Greek ταχυόνιον, takhyónion, from ταχύς, takhýs, i.e. swift, fast) is any hypothetical particle that travels at superluminal velocity. The first description of tachyons is attributed to German physicist Arnold Sommerfeld, but it was George Sudarshan, Olexa-Myron Bilaniuk[1][2] and Gerald Feinberg[3] (who originally coined the term) in the 1960s who advanced a theoretical framework for their study. Tachyonic fields have appeared theoretically in a variety of contexts, such as the Bosonic string theory. In the language of special relativity, a tachyon is a particle with space-like four-momentum and imaginary proper time. A tachyon is constrained to the space-like portion of the energy-momentum graph. Therefore, it can never slow to light speed or below Even if tachyons were conventional, localisable particles they would still preserve the basic tenets of causality in special relativity and not allow information to move faster than light[3].

  3. Tachyons are a putative class of particles which able to travel faster than the speed of light. Tachyons were first proposed by physicist Arnold Sommerfeld, and named by Gerald Feinberg. The word tachyon derives from the Greek (tachus), meaning “speedy.” Tachyons have the strange properties that, when they lose energy, they gain speed. Consequently, when tachyons gain energy, they slow down. The slowest speed possible for tachyons is the speed of light.
    Tachyons appear to violate causality (the so-called causality problem), since they could be sent to the past under the assumption that the principle of special relativity is a true law of nature, thus generating a real unavoidable time paradox (Maiorino and Rodrigues 1999). Therefore, it seems unavoidable that if tachyons exist, the principle of special relativity must be false, and there exists a unique time order for all observers in the universe Eric Weisstein’s World of Astronomy independent of their state of motion.
    Tachyons can be assigned properties of normal matter such as spin, as well as an antiparticle (the antitachyon). And amazingly, modern presentations of tachyon theory actually allow tachyons to actually have real mass (Recami 1996).
    It has been proposed that tachyons could be produced from high-energy particle collisions, and tachyon searches have been undertaken in cosmic rays. Cosmic rays hit the Earth’s atmosphere with high energy (some of them with speed almost 99.99% of the speed of light) making several collisions with the molecules in the atmosphere. The particles made by this collision interact with the air, creating even more particles in a phenomenon known as a cosmic ray shower. In 1973, using a large collection of particle detectors, Philip Crough and Roger Clay identified a putative superluminal particle in an air shower, although this result has never been reproduced.

  4. A tachyon is any hypothetical particle that travels faster than light. Tachyonic fields have appeared theoretically in a variety of contexts, such as the Bosonic string theory. In the language of special relativity, a tachyon is a particle with space-like four-momentum and imaginary proper time. A tachyon is constrained to the space-like portion of the energy-momentum graph. Therefore, it can never slow to light speed or below. (I hope you got all that because I sure didn’t.)
    Today, in the framework of quantum field theory, tachyons are best understood to signify an instability of the system and treated by tachyon condensation, rather than as a real faster-than-light particle, and such instabilities are described by tachyonic fields. Thus according to the modern understanding of the concept of a particle, tachyon particles are too unstable to be treated as existing.
    Thus faster than light information transmission and causality violation with tachyons are doubly impossible: if they existed they wouldn’t transmit information – but they don’t exist anyway.

  5. Tachyons are theoretical particles that travel faster than the speed of light.
    Normal matter at zero kinetic energy are stationary. When you ad kinetic energy to normal matter, its velocity increases. The closer normal matter gets to the speed of light relative to an observer, the higher the mass, the shorter the length and the slower time flows for that mass… It least that what seems to be true. The moving mass can also claim the same thing – that the universe is getting more massive, that time in the universe is slowing down and that the length of the universe along the direction of travel get shorter.
    However, tachyons are different, a zero energy tachyon moves at infinite velocity – thus it occupies all points in space in the entire universe simultaneously. When you ad kinetic energy to a tachyon, it slows down. As a tachyon approaches the speed of light, it becomes super massive just like normal matter does – it cannot be slowed to the speed of light.
    The equations of relativity don’t imply its impossible to travel faster than light, they imply that it is impossible to travel at the speed of light… unless you are massless… Then the only speed you CAN go is that of light.
    The problem is that to go say 60 miles per hour from a stop, you had to at some point been going 50 miles per hour.
    Same with normal matter and tachyons. To stop a tachyon, it would have to be slowed and thus at some point been traveling at the speed of light – that’s a no no. For normal matter to travel faster than light, it at some point has to travel at the speed of light – again a no no.
    The trick is to avoid having to accelerate through the speed of light.
    Its been proposed that if a zero energy tachyon moves at infinite speed, thus occupying all points of space at the same time, can not the universe itself be thought of AS a zero energy tachyon?

  6. They are theoretical particles that violates Einsteins rules. Tachyons MUST travel faster than light, which Einstein says is not possible.
    Of course, no one is perfect and no one is absolutely right, but no one has found a Tachyon.

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