论文标题
激发字符串的光子发射
Photon emission from an excited string
论文作者
论文摘要
我们通过发射tachyon或photon的发射来计算任何精确指定的状态中激发字符串的振幅，以在任何精确指定的状态中腐烂到另一个精确指定状态的振幅。对于通用和高度激发的弦态，振幅是外向运动角度的复杂函数，对精确状态敏感。我们计算了这种振幅的平方，平均在ingoing弦的极化上进行了平均，并在外向串的极化上求和。通过提取涉及涉及tachyons和大量光子的振幅的激发字符串的幅度，使这些计算的似乎是棘手的。光子的数量随激发弦状态的复杂性而生长。我们的工作本着量子多体系统的统计力学和混乱的最新研究的精神。给定质量处的不同激发弦状态的数量呈指数较大，我们的计算给出了来自每个微晶体的单个光子的发射幅度 - 通过Horowitz-Polchinski对应原理，该光子与黑洞微杆相应。
We compute the amplitude for an excited string in any precisely specified state to decay into another excited string in any precisely specified state, via emission of a tachyon or photon. For generic and highly excited string states, the amplitude is a complicated function of the outgoing kinematic angle, sensitive to the precise state. We compute the square of this amplitude, averaged over polarizations of the ingoing string and summed over polarizations of the outgoing string. The seeming intractability of these calculations is made possible by extracting amplitudes involving excited strings from amplitudes involving tachyons and a large number of photons; the number of photons grows with the complexity of the excited string state. Our work is in the spirit of the broad range of recent studies of statistical mechanics and chaos for quantum many-body systems. The number of different excited string states at a given mass is exponentially large, and our calculation gives the emission amplitude of a single photon from each of the microstates -- which, through the Horowitz-Polchinski correspondence principle, are in correspondence with black hole microstates.
