We investigate an alternative quantization of R-NS string theory. In the alternative quantization, we define the distinct vacuum for the left-moving mode and the right-moving mode by exchanging the role of creation operators and annihilation operators in the left-moving sector. The resulting string theory has only a finite number of propagating degrees of freedom. We show that an appropriate choice of the GSO projection makes the theory tachyon free. The spectrum coincides with the massless sector of type IIA or type IIB superstring theory without any massive excitations.

中文翻译：

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关于 R-NS 字符串的另一种量化

我们研究了 R-NS 弦理论的另一种量化。在交替量化中，我们通过交换左移扇区中的创生算子和湮灭算子的角色，定义了左移模态和右移模态的不同真空。由此产生的弦理论只有有限数量的传播自由度。We show that an appropriate choice of the GSO projection makes the theory tachyon free. 该光谱与 IIA 型或 IIB 型超弦理论的无质量扇区一致，没有任何大规模激发。