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This tag is for questions regarding to the Unruh effect (also known as the Fulling–Davies–Unruh effect), the hypothetical prediction that an accelerating observer will observe a thermal bath, like blackbody radiation, whereas an inertial observer would observe none. It was described by Stephen Fulling in 1973, Paul Davies in 1975, and William Unruh in 1976.

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The Unruh effect for temporarily accelerated particles

Do temporarily accelerated particles experience the Unruh effect? I think, they don't, because they don't see an apparent event horizon. On the other hand, if the duration of the acceleration is long …
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