And what if gravity is intrinsically quantic ?

Abstract

Since the early days of search for a quantum theory of gravity the attempts have been mostly concentrated on the quantization of an otherwise classical system. The two most contentious candidate theories of gravity, sting theory and quantum loop gravity are based on a quantum field theory - the latter is a quantum field theory of connections on a SU(2) group manifold and former a quantum field theory in two dimensional spaces. Here we argue that there is a very close relation between quantum mechanics and gravity. Without gravity quantum mechanics becomes ambiguous. We consider this observation as the evidence for an intrinsic relation between these fundamental laws of nature. We suggest a quantum role and definition for gravity in the context of a quantum universe, and present a preliminary formulation for gravity in a system with a finite number of particles.

8 pages, 1 figure. To appear in the proceedings of the DICE2008 conference, Castiglioncello, Tuscany, Italy, 22-26 Sep. 2008. V2: some typos removed

References in corpus (12)

• Microscopic Origin of the Bekenstein-Hawking Entropy
• Black Hole Entropy is Noether Charge
• Heterotic and Type I String Dynamics from Eleven Dimensions
• The quantum structure of spacetime at the Planck scale and quantum fields
• Analogue Gravity
• D-brane Approach to Black Hole Quantum Mechanics
• Counting States of Near-Extremal Black Holes
• Emergent Gravity from Noncommutative Gauge Theory
• Can Spacetime be a Condensate?
• Is gravity an intrinsically quantum phenomenon? Dynamics of Gravity from the Entropy of Spacetime and the Principle of Equivalence
• On The Correspondence Between Noncommuative Field Theory And Gravity
• Slice Energy in Higher Order Gravity Theories and Conformal Transformations

Cited by in corpus (6)

• Comparing Quantum Gravity Models: String Theory, Loop Quantum Gravity, and Entanglement gravity versus $SU(\infty )$-QGR
• Making a Quantum Universe: Symmetry and Gravity
• Issues with vacuum energy as the origin of dark energy
• Classical, quantum, and phenomenological aspects of dark energy models
• Quantum Mechanics in symmetry language
• Non-equilibrium evolution of quantum fields during inflation and late accelerating expansion