Decoherence-Free Entropic Gravity: Model and Experimental Tests
- URL: http://arxiv.org/abs/2012.10626v2
- Date: Thu, 22 Jul 2021 04:16:55 GMT
- Title: Decoherence-Free Entropic Gravity: Model and Experimental Tests
- Authors: Alex J. Schimmoller, Gerard McCaul, Hartmut Abele, Denys I. Bondar
- Abstract summary: Some have ruled out Erik Verlinde's theory of entropic gravity on grounds that entropic forces are by nature noisy.
We address this criticism by modeling linear gravity acting on small objects as an open quantum system.
We show that the proposed master equation is fully compatible with the textitqtextscBounce experiment for ultra-cold neutrons.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Erik Verlinde's theory of entropic gravity [arXiv:1001.0785], postulating
that gravity is not a fundamental force but rather emerges thermodynamically,
has garnered much attention as a possible resolution to the quantum gravity
problem. Some have ruled this theory out on grounds that entropic forces are by
nature noisy and entropic gravity would therefore display far more decoherence
than is observed in ultra-cold neutron experiments. We address this criticism
by modeling linear gravity acting on small objects as an open quantum system.
In the strong coupling limit, when the model's unitless free parameter $\sigma$
goes to infinity, the entropic master equation recovers conservative gravity.
We show that the proposed master equation is fully compatible with the
\textit{q}\textsc{Bounce} experiment for ultra-cold neutrons as long as
$\sigma\gtrsim 250$ at $90\%$ confidence. Furthermore, the entropic master
equation predicts energy increase and decoherence on long time scales and for
large masses, phenomena which tabletop experiments could test. In addition,
comparing entropic gravity's energy increase to that of the Di\'{o}si-Penrose
model for gravity induced decoherence indicates that the two theories are
incompatible. These findings support the theory of entropic gravity, motivating
future experimental and theoretical research.
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