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Abstract:
The celebrated Kawai-Lewellen-Tye (KLT) relations show that tree-level closed string amplitudes factorize into a sum of quadratic products of open string amplitudes. The discovery of such relations has led to numerous insights into amplitudes in quantum field theory, and inspired the active studies of gravity as a double copy of gauge theory over the past decade. In this talk, I will discuss the basics of string amplitudes and how KLT relations are constructed in string theory. Then, I will talk about a recently established KLT relation between winding string amplitudes, which involve elegant D-brane configurations.
Biography:
I am currently a Nordita / Marie Curie Fellow at Nordita. I was a postdoc at Perimeter Institute from 2017 to 2020. I received my PhD in physics from UC Berkeley in 2017 and my bachelor in astronomy from Nanjing University in 2012. I am interested in quantum fields and strings.