Chaotic scattering of highly excited strings

Chaotic scattering of highly excited strings
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高激发弦的混沌散射

DOI:
10.1007/jhep05(2021)048
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发表时间:
2021
影响因子:
5.4
通讯作者:
Rosenhaus, Vladimir
Rosenhaus, Vladimir
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Gross, David J.;Rosenhaus, Vladimir

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出于了解弦理论 S 矩阵中混沌的愿望,我们研究了涉及高度激发弦的树级散射振幅。虽然光弦散射的振幅自早期以来一直是弦理论的一个标志,但对受激弦散射的研究却少得多。最近关于黑洞混沌的研究结果,结合黑洞与弦的对应原理,表明振幅具有丰富的结构。我们回顾了通过从初始快子上反复散射光子来形成受激弦的过程(DDF 形式)。我们计算玻色弦理论中任意一根受激弦和任意数量的快子的散射幅度。在高能量和高质量激发态下,这些振幅由球体(或上半平面)上弦顶点算子的位置积分中的鞍点决定,从而产生“散射方程”的概括。我们找到了一个激励弦衰减为两个快子的振幅的紧凑表达式,并研究了它对于一般激励弦的属性。我们发现,作为精确激发弦状态和相对于其偏振的快子散射角的函数,振幅非常不稳定,这是混沌的迹象。
Motivated by the desire to understand chaos in the S-matrix of string theory, we study tree level scattering amplitudes involving highly excited strings. While the amplitudes for scattering of light strings have been a hallmark of string theory since its early days, scattering of excited strings has been far less studied. Recent results on black hole chaos, combined with the correspondence principle between black holes and strings, suggest that the amplitudes have a rich structure. We review the procedure by which an excited string is formed by repeatedly scattering photons off of an initial tachyon (the DDF formalism). We compute the scattering amplitude of one arbitrary excited string and any number of tachyons in bosonic string theory. At high energies and high mass excited state these amplitudes are determined by a saddle-point in the integration over the positions of the string vertex operators on the sphere (or the upper half plane), thus yielding a generalization of the “scattering equations”. We find a compact expression for the amplitude of an excited string decaying into two tachyons, and study its properties for a generic excited string. We find the amplitude is highly erratic as a function of both the precise excited string state and of the tachyon scattering angle relative to its polarization, a sign of chaos.
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