On Dark Energy and Quantum Gravity
arXiv:1905.09463 · doi:10.1142/S0218271819440188
Abstract
Realizing dark energy and the observed de Sitter spacetime in quantum gravity has proven to be obstructed in most every usual approach. We argue that additional degrees of freedom of the left- and right-movers in string theory and a resulting doubled, non-commutatively generalized geometric formulation thereof can lead to an effective model of dark energy consistent with de Sitter spacetime. In this approach, the curvature of the canonically conjugate dual space provides for the dark energy inducing a positive cosmological constant in the observed spacetime, whereas the size of the above dual space is the gravitational constant in the same observed de Sitter spacetime. As a hallmark relation owing to a unique feature of string theory which relates short distances to long distances, the cosmological constant scale, the Planck scale, and the effective TeV-sized particle physics scale must satisfy a see-saw-like formula---precisely the generic prediction of certain stringy cosmic brane type models.
arXiv comment7 pages; This essay received an honorable mention in the Gravity Research Foundation 2019 Awards for Essays on Gravitation competition. arXiv admin note: substantial text overlap with arXiv:1905.08269
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