Positivity Constraints for condensed matter and cosmology
Speakers: Paolo Creminelli (ICTP, Trieste) The coefficients of the operators of an effective field theory (EFT) are constrained to satisfy certain inequalities, under the (mild) assumption that the UV completion satisfies general requirements of causality and unitarity. I discuss the extension of these ideas to theories where the Lorentz symmetry is spontaneously broken, as it […]