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arXiv · 1711.05179

Massive Unruh particles cannot be directly observed

Filip Kiałka·Alexander R. H. Smith·Mehdi Ahmadi·Andrzej Dragan
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Abstract

We show that massive particles created in a relativistically accelerated reference frame, as predicted by the Unruh effect, can only be found in a tiny layer above the event horizon, whose thickness corresponds to a single Compton wavelength. This is beyond the reach of any detector and suggests that the Unruh effect may not ever be directly observed for massive fields. The case of massless particles is also examined, for which qualitatively different behaviour is observed in a low-acceleration regime, suggesting that an observation of the Unruh effect for massless particles is more promising.

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Filip Kiałka, Alexander R. H. Smith, Mehdi Ahmadi, Andrzej Dragan. 2017-11-14. Massive Unruh particles cannot be directly observed. https://doi.org/10.1103/physrevd.97.065010

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