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One of the great challenges for 21st century physics is to quantize gravity and generate a theory that will unify gravity with the other three fundamental forces of nature. In this talk I will take the (heretical) point of view that gravity may be an inherently classical, i.e., nonquantum, phenomenon and investigate the experimental consequences of such a conjecture. At present there is no experimental evidence of the quantum nature of gravity and the likelihood of a definitive test in the future is not at all certain. In particular, it appears that the possibility of directly detecting gravitons is, in principle, (nearly) impossible. If gravity is, indeed, a nonquantum phenomenon, then I suggest that evidence will most likely appear at mesoscopic scales.
Talk URL: http://xxx.lanl.gov/abs/0809.4218 |
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