Emergent Spacetime and The Cosmological Constant

We address issues on the origin of gravity and the dark energy (or the cosmological constant) from the perspectives of emergent gravity. We discuss how the emergent gravity reveals a noble, radically different picture about the origin of spacetime, which is crucial for a tenable solution of the cosmological constant problem. In particular, the emergent gravity naturally explains the dynamical origin of flat spacetime, which is absent in Einstein gravity.Comment: 2 pages; Contribution to Proceedings of the workshop "Progress of String Theory and Quantum Field Theory", Osaka City University, Japan, 7-10 December 200