Exotic Matter - Imaginary Mass

Imaginary Mass

A hypothetical particle with imaginary rest mass would always travel faster than the speed of light. Such particles are called tachyons. There is no confirmed existence of tachyons.

If the rest mass is imaginary this implies that the denominator is imaginary since the total energy is an observable and thus must be real; therefore the quantity under the square root must be negative, which can only happen if v is greater than c. As noted by Gregory Benford et al., among others, special relativity implies that tachyons, if they existed, could be used to communicate backwards in time (see Tachyonic antitelephone article). Since time travel is considered to be non-physical, tachyons are believed by physicists either to not exist, or else to be incapable of interacting with normal matter.

In quantum field theory, imaginary mass would induce tachyon condensation.

Read more about this topic:  Exotic Matter

Other articles related to "imaginary mass, mass":

Tachyon - Fundamental Models - Fields With Imaginary Mass
... Gerald Feinberg studied Lorentz invariant quantum fields with imaginary mass ... Instead, the negative mass represents an instability to tachyon condensation, and all excitations of the field propagate subluminally and are consistent with causality ... Model of particle physics, which—in its uncondensed phase—has an imaginary mass ...

Famous quotes containing the words mass and/or imaginary:

    It is strange to contemplate how little sympathy or encouragement the great mass of people have with one who differs from them in tastes, to the extent of desiring an education, while they are content with little or none.
    Caroline Nichols Churchill (1833–?)

    Avarice, the spur of industry, is so obstinate a passion, and works its way through so many real dangers and difficulties, that it is not likely to be scared by an imaginary danger, which is so small that it scarcely admits of calculation.
    David Hume (1711–1776)