[1208.3703] Quantum Geometry and Interferometry

Authors: Craig Hogan

Date: 17 Aug 2012

Abstract: All existing experimental results are currently interpreted using classical geometry. However, there are theoretical reasons to suspect that at a deeper level, geometry emerges as an approximate macroscopic behavior of a quantum system at the Planck scale. If directions in emergent quantum geometry do not commute, new quantum-geometrical degrees of freedom can produce detectable macroscopic deviations from classicality: spatially coherent, transverse position indeterminacy between any pair of world lines, with a displacement amplitude much larger than the Planck length. Positions of separate bodies are entangled with each other, and undergo quantum-geometrical fluctuations that are not describable as metric fluctuations or gravitational waves. These fluctuations can either be cleanly identified or ruled out using interferometers. A Planck-precision test of the classical coherence of space-time on a laboratory scale is now underway at Fermilab.

abs pdf

Sep 19, 2012

1208.3703 (/preprints)
2012-09-19, 18:06 [edit]

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

Tantum in modicis, quantum in maximis