arXiv · 2206.10951
We perform imaging of a fundamental string from string scattering amplitudes, and show that its image is a double slit.
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Koji Hashimoto, Yoshinori Matsuo, Takuya Yoda. 2022-08-17. String is a double slit. https://arxiv.org/abs/2206.10951
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These notes were prepared for a series of intensive lectures delivered at Hokkaido University, Nagoya University, Kyoto University, and Kyushu University. We begin with a brief review of higher-form symmetries, anomalies, and discrete gauge theories, before introducing non-invertible symmetries in $(1+1)$-dimensional systems. The basic structure of fusion categories is then discussed, including a discussion of categorical analogs of discrete gauging and representation theory. We subsequently turn to $(3+1)$-dimensional theories, where several physical applications of non-invertible symmetries are discussed. These notes are intended to be largely self-contained, and require no prior familiarity with subjects such as conformal field theory or lattice models.
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