2 papers
hep-th2024
Operator Origin of Anomalous Dimensions in de Sitter Space
Timothy Cohen, Daniel Green, Yiwen Huang
The late time limit of the power spectrum for heavy (principal series) fields in de Sitter space yields a series of polynomial terms with complex scaling dimensions. Such scaling b…
hep-th2023
Positivity from Cosmological Correlators
Daniel Green, Yiwen Huang, Chia-Hsien Shen +1
Effective field theories in flat space and in anti-de Sitter space are constrained by causality and unitarity, often in the form of positivity bounds. Similar bounds have been hard…