Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-07-30
Int.J.Mod.Phys.A22:2661-2672,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, 2 figures, proposes a laboratory experiment
Scientific paper
10.1142/S0217751X07036737
It is generally considered as self evident that the lifetime of our vacuum in the landscape of string theory cannot be much shorter than the current age of the universe. Here I show why this lower limit is invalid. A certain type of ``parallel universes'' is a necessary consequence of the string-landscape dynamics and might well allow us to ``survive'' vacuum decay. As a consequence our stringy vacuum's lifetime is empirically unconstrained and could be very short. Based on this counter-intuitive insight I propose a novel type of laboratory experiment that searches for an apparent violation of the quantum-mechanical Born rule by gravitational effects on vacuum decay. If the lifetime of our vacuum should turn out to be shorter than 6 x 10^{-13} seconds such an experiment is sufficiently sensitive to determine its value with state-of-the-art equipment.
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