[1211.3816] Is a tabletop search for Planck scale signals feasible

Authors: Jacob D. Bekenstein

Date: 16 Nov 2012

Abstract: Quantum gravity theory is untested experimentally. Could it be tested with tabletop experiments? While the common feeling is pessimistic, a detailed inquiry shows it possible to sidestep the onerous requirement of localization of a probe on Planck length scale. I suggest a tabletop experiment which, given state of the art ultrahigh vacuum and cryogenic technology, could already be sensitive enough to detect Planck scale signals. The experiment combines a single photon's degree of freedom with one of a macroscopic probe to test Wheeler's conception of "spacetime foam", the assertion that on length scales of the order Planck's, spacetime is no longer a smooth manifold. The scheme makes few assumptions beyond energy and momentum conservations, and is not based on a specific quantum gravity scheme.

abs pdf

Nov 26, 2012

1211.3816 (/preprints)
2012-11-26, 11:43 [edit]


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© M. Vallisneri 2012 — last modified on 2010/01/29

Tantum in modicis, quantum in maximis