Severe Challenges In Gravity Theories

Details Severe Challenges In Gravity Theories Severe Challenges In Gravity Theories

2011-06-29

arxiv.org/abs/1106.6053v1

Physics

General Physics

Lecture delivered at the 2011 Shanghai Asia-Pacific School & Workshop on Gravitation, Shanghai Normal University, Feb.10 -14,

Scientific paper

Gravity is specifically the attractive force between two masses separated at a distance. Is this force a derived or a fundamental interaction? We believe that all fundamental interactions are quantum in nature but a derived interaction may be classical. Severe challenges have appeared in many quantum theories of gravity. None of these theories has thus far attained its goal in quantizing gravity and some have met remarkable defeat. We are led to ponder whether gravitation is intrinsically classical and that there would exist a deeper and structurally different underlying theory which would give rise to classical gravitation, in the sense that statistical mechanics, quantum or classical, provides the underlying theory of classical thermodynamics.

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