3 papers
hep-th2026
Nambu-Goldstone Bosons and Quantum Fisher Information
Eugene Chen, Daniel Green
The quantum Fisher matrix and geometric tensor are powerful tools for quantifying the nature of quantum systems. Unfortunately, the formalism needed to compute these quantities is…
astro-ph.CO2026
Primordial Non-Gaussianity and the Field-Level Cramer-Rao Bound
Eugene Chen, Daniel Green, Vincent S. H. Lee
Primordial non-Gaussianity is one of the most powerful probes of the inflationary epoch. The particle spectrum relevant to inflation, including masses and spins, is encoded in the…
hep-th2026
A Convergent Kinetic-Term Perturbation Expansion for Theory
Eugene Chen
We revisit scalar theory and construct a reorganized perturbative expansion in which the kinetic operator, rather than the quartic interaction, is treated as the perturbation…