The Atoms Of Space, Gravity and the Cosmological Constant

Understand

I describe an approach which connects classical gravity with the quantum microstructure of spacetime.

• The field equations arise from maximizing the density of states of matter plus geometry.
• The former is identified using the thermodynamics of null surfaces while the latter arises due to the existence of a zero-point length in the spacetime.
• The resulting field equations remain invariant when a constant is added to the matter Lagrangian, which is a symmetry of the matter sector.