On Quantum Nature of Gravity

In this paper, starting from a new unified formalism of quantum mechanics and thermodynamics developed in Agung Budiyono, ArXiv:quant-ph/0512235 and quant-ph/0601212, we shall derive Einstein general relativity. Gravity will be shown to be not as ”fundamental physics”, but as ”emergent phenomena ” of quantum physics, after the latter is decoded in term of geometrical language. In particular, the celebrated Einstein field equation with discrete spectrum of negative definite cosmological constants will be proven to be valid only in the vicinity of stable/marginally stable thermodynamical local equilibrium states. Each cosmological constant characterizes a local thermodynamics equilibrium state. We shall first apply the new approach of quantum-gravity to derive the Bekenstein-Hawking entropy for general space-time, and clarifies its problematic physical meaning. We shall then prove that our reformulation of general relativity does not suffer from the cosmological singularity at the beginning of the universe. The initial universe is shown to be extremely dense, yet finite. Finally, we shall discuss the ontological meaning of space-time quantization, the emergence of Poincare invariance, and showing the realization of Penrose’s proposal on gravity induced wave function collapse.