标题： 自对偶临界N=2弦 显示英文标题

标题： The Self-Dual Critical N=2 String

摘要： 我回顾了具有 (2,2) 扩展世界面超对称性的闭合费米弦在 R^{2,2}上的协变量子化。 展示了树图和一环世界面具有任意 Maxwell 瞬子数的 n 点散射振幅的结果。 我详细阐述了 Maxwell 模量、光谱流和瞬子之间的联系。 有人认为后者通过撤销时空复结构的选择，将洛伦兹对称性从 U(1,1) 扩展到 SO(2,2)。 显示英文摘要

摘要： I review the covariant quantization of the closed fermionic string with (2,2) extended world-sheet supersymmetry on R^{2,2}. Results on n-point scattering amplitudes are presented, for tree- and one-loop world-sheets with arbitrary Maxwell instanton number. I elaborate the connection between Maxwell moduli, spectral flow, and instantons. It is argued that the latter serve to extend the Lorentz symmetry from U(1,1) to SO(2,2) by undoing the choice of spacetime complex structure.