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CAS Key Laboratory of Theoretical Physics |
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Institute of Theoretical Physics |
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Chinese Academy of Sciences |
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Seminar |
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Title
题目 |
USES of String Field Theory |
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Speaker
报告人 |
Taejin Lee |
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Affiliation
所在单位 |
Department of Physics, Kangwon National University |
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Date
日期 |
2018年8月3日（周五）10:00 |
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Venue
地点 |
Conference Room 6420, ITP new building |
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Abstract
摘要 |
I will introduce the covariant string field theories and the Polyakov string path integrals in the proper-time gauge. In the proper-time gauge, the string path integral can be written as integrals over the proper-times in a way similar to the Schwinger's proper time representation of Feynman integrals of quantum field theory. For this reason, it becomes feasible in the proper-time gauge to identify the field theoretical expressions of the string path integrals which depict multiple string scatterings. I will discuss the four-massless-particle scattering amplitude in open string theory and the four-graviton scattering amplitude in the closed string theory. The covariant string field theories are useful to study the ultraviolet behavior and the entanglement entropy of strings which are quite different from their counterparts of point particles. |
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Contact person
所内联系人 |
Rong-Gen Cai |
