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arXiv 2003.12076hep-th
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二维弦论中的发散到复振幅

Divergent to Complex Amplitudes in Two Dimensional String Theory

Ashoke Sen

摘要:

在最近的一篇论文中,Balthazar、Rodriguez和Yin发现,一个瞬子对二维弦论和矩阵模型的散射振幅的贡献在第一次引导阶之间是惊人的一致。由于实能量的弦论结果是发散的,所以通过解析地将外能延拓到虚值来进行数值比较。我们使用弦场论的见解,给出实能量下弦论振幅的有限表达式。我们还通过分析表明,以这种方式计算的弦论振幅的虚部再现了涉及多个闭合弦的一般散射振幅的全矩阵模型结果。

英文摘要:

In a recent paper, Balthazar, Rodriguez and Yin found remarkable agreement between the one instanton contribution to the scattering amplitudes of two dimensional string theory and those in the matrix model to the first subleading order. The comparison was carried out numerically by analytically continuing the external energies to imaginary values, since for real energies the string theory result diverges. We use insights from string field theory to give finite expressions for the string theory amplitudes for real energies. We also show analytically that the imaginary parts of the string theory amplitudes computed this way reproduce the full matrix model results for general scattering amplitudes involving multiple closed strings.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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