单词	tachyon
释义	tachyon /ˈtakɪɒn / noun Physics A hypothetical particle that travels faster than light.Small subatomic particles such as photons, particles of light, and hypothetical particles called tachyons seem to have no problem reaching light speed.... The biggest problem with bosonic string theory (aside from the lack of fermions) is that the lowest energy state was a tachyon, or a particle mode with negative mass squared. The existence of tachyons is allowed by the equations of Einstein's special theory of relativity. Origin 1960s: from tachy- 'swift' + -on.
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