How to Hide a Cosmological Constant
arXiv:1905.05216 · doi:10.1142/S0218271819430041
Abstract
Naive calculations in quantum field theory suggest that vacuum fluctuations should induce an enormous cosmological constant. What if these estimates are right? I argue that even a huge cosmological constant might be hidden in Planck scale fluctuations of geometry and topology---what Wheeler called `spacetime foam'---while remaining virtually invisible macroscopically.
Fourth award, Gravity Research Foundation 2019 Awards for Essays on Gravitation; based in part on arXiv:1809.08277; 5 pages