Physics 版 (精华区)
发信人: zjliu (秋天的萝卜), 信区: Physics
标 题: Nature文章:γ射线暴限制量子引力
发信站: 哈工大紫丁香 (Thu Dec 4 16:20:06 2003), 站内信件
Nature 426, 139 (13 November 2003)
A constraint on canonical quantum gravity?
Gamma rays from the γ-ray burst (GRB) 021206 have been reported to be strongl
y linearly polarized1, with the estimated degree of polarization (80 20%) bei
ng close to the absolute maximum of 100% — affording us the opportunity to co
nstrain models of quantum gravity, which has had 1010 years to act on the phot
ons as they travelled towards us. Here I show that if the effects of quantum g
ravity are linearly proportional to the ratio of the photon energy to the char
acteristic scale energy of quantum gravity, then the polarization of photons w
ith energies of about 0.1 MeV should be completely random, contrary to what is
observed. I conclude that, should the polarization measurement be confirmed,
quantum gravity effects act with a power that is greater than linearity, or th
at loop quantum gravity is not viable. Compared with previous methods and resu
lts (see ref. 2, for example), testing of the linear polarization of cosmic -r
uantum gravity.
http://bbs1.nju.edu.cn/file/426139.pdf
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