AI 中文总结
本研究推导旋转等离子体光子辐射谱，发现其软光子发射量多于非旋转等离子体，满足ω<mΩ的光子会产生超辐射，且超辐射模式会引发相对论重离子碰撞中磁场的不稳定性。
AI 中文摘要
基于流-流关联函数的谱函数，推导了以恒定角速度Ω旋转的等离子体的光子发射和吸收谱。与非旋转情况不同，其主导贡献已出现在单圈阶。针对旋转夸克-胶子等离子体计算了光子发射谱及其椭圆流，并与非旋转等离子体的主导两圈结果进行了比较。发现旋转等离子体比非旋转等离子体发射显著更多的软光子。对圆柱波的发射和吸收分析表明，满足能量ω和方位角量子数m的光子，当ω<mΩ时，其发射速率高于吸收速率，从而表现出超辐射现象。进一步论证指出，这些超辐射模式会引发相对论重离子碰撞中与等离子体同时产生的磁场的不稳定性。
英文摘要
The photon emission and absorption spectra of a plasma rotating with constant angular velocity $Ω$ are derived in terms of the spectral function of the current--current correlator. In contrast to the non-rotating case, the leading contribution arises already at one-loop order. The photon emission spectrum and its elliptic flow are calculated for a rotating quark--gluon plasma and compared with the leading two-loop result for a non-rotating plasma. The rotating plasma is found to emit significantly more soft photons than the non-rotating one. An analysis of the emission and absorption of cylindrical waves indicates that photons with energy $ω$ and azimuthal quantum number $m$ satisfying $ω<mΩ$ are emitted at a higher rate than they are absorbed, thereby exhibiting the phenomenon of superradiance. It is further argued that these superradiant modes induce an instability of the magnetic field that is generated concurrently with the plasma in relativistic heavy-ion collisions.
Comments11 pages, 4 figures
