Lorentz violation induced vacuum birefringence and its astrophysical consequences
Lorentz violation induced vacuum birefringence and its astrophysical consequences
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DOI：
10.1103/physrevd.83.127702
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发表时间：
2011-04
影响因子：
5
通讯作者：
Lijing Shao;B. Ma
中科院分区：
文献类型：
--
作者：
Lijing Shao;B. Ma
在圈量子引力的电磁学中，光子的两个螺旋度具有不同的相速度和群速度，称为“真空双折射”。天文光源的线偏振光将出现两种新的现象：“峰值倍增”和“去偏振”。我们发现，观察这两种现象的标准是相同的。此外，从最近观察到的$\gamma$-射线偏振从天鹅座X-1，我们得到了一个上限$\sim 8.7\times10^{-12}$洛伦兹破坏参数$\chi$，这是最坚定的约束，从著名的系统。我们还建议分析费米LAT伽玛暴可能存在的“双峰”现象。
In the electromagnetism of loop quantum gravity, two helicities of a photon have different phase velocities and group velocities, termed as "vacuum birefringence". Two novel phenomenons, "peak doubling" and "de-polarization", are expected to appear for a linearly polarized light from astrophysical sources. We show that the criteria to observe these two phenomenons are the same. Further, from recently observed $\gamma$-ray polarization from Cygnus X-1, we obtain an upper limit $\sim 8.7\times10^{-12}$ for Lorentz-violating parameter $\chi$, which is the most firm constraint from well-known systems. We also suggest to analyze possible existence of "peak doubling" through Fermi LAT GRBs.