Photon emission from an excited string
Photon emission from an excited string
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DOI：
10.1007/jhep09(2022)211
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发表时间：
2022-07
影响因子：
5.4
通讯作者：
Maurizio Firrotta;V. Rosenhaus
中科院分区：
文献类型：
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作者：
Maurizio Firrotta;V. Rosenhaus
我们计算了在任何精确指定状态下的激发态弦通过发射速子或光子衰变为另一个精确指定状态下的激发态弦的振幅。对于一般和高激发态，弦的振幅是出射运动角的复杂函数，对精确状态很敏感。我们计算这个振幅的平方，对输入弦的极化取平均值并对输出弦的极化求和。通过从涉及速子和大量光子的振幅中提取涉及激发态弦的振幅，可以使这些看似棘手的计算成为可能；光子的数量随着激发态的复杂性而增加。我们的工作本着最近对量子多体系统的统计力学和混沌的广泛研究的精神。在给定的质量下，不同的激发态的数量是指数级的，我们的计算给出了每个微态中单个光子的发射振幅——通过霍洛维茨-波尔钦斯基对应原理，这些微态与黑洞的微态是对应的。
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.