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Fields with imaginary mass

In the paper that coined the term “tachyon”, Gerald Feinberg studied Lorentz invariant quantum fields with imaginary mass. Because the group velocity for such a field is superluminal, naively it appears that its excitations propagate faster than light. However, it was quickly understood that the superluminal group velocity does not correspond to the speed of […]

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Creating a Sandbox

  A Sandbox is a term related to the sandbox you might have played in and built sand castles in as a child. It is a playground for working on concepts and exploring your imagination. A WordPress Sandbox is basically a copy of a generated page on a WordPress site that is saved to your hard drive

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