Dark Energy and Emergent Spacetime

TL;DR

This paper proposes a novel emergent spacetime framework based on noncommutative symplectic geometry, offering new insights into dark energy, the cosmological constant problem, and the origin of gravity and flat spacetime.

Contribution

It introduces a symplectic geometric approach to noncommutative spacetime, linking electromagnetism to gravity and explaining the emergence of flat spacetime from Planck energy condensation.

Findings

Emergent gravity explains the origin of flat spacetime.

The framework offers a potential solution to the cosmological constant problem.

Provides a new perspective on dark energy and the weakness of gravity.

Abstract

A natural geometric framework of noncommutative spacetime is symplectic geometry rather than Riemannian geometry. The Darboux theorem in symplectic geometry then admits a novel form of the equivalence principle such that the electromagnetism in noncommutative spacetime can be regarded as a theory of gravity. Remarkably the emergent gravity reveals a noble picture about the origin of spacetime, dubbed as emergent spacetime, which is radically different from any previous physical theory all of which describe what happens in a given spacetime. In particular, the emergent gravity naturally explains the dynamical origin of flat spacetime, which is absent in Einstein gravity: A flat spacetime is not free gratis but a result of Planck energy condensation in a vacuum. This emergent spacetime picture, if it is correct anyway, turns out to be essential to resolve the cosmological constant problem, to understand the nature of dark energy and to explain why gravity is so weak compared to other forces.