2 papers
hep-th2025
On the physical and mathematical foundations of quantum physics via functional integrals
Giampiero Esposito, Tepper L. Gill
In order to preserve the leading role of the action principle in formulating all field theories one needs quantum field theory, with the associated BRST symmetry, and Feynman-DeWit…
gr-qc2025
New perspectives on the irregular singular point of the wave equation for a massive scalar field in Schwarzschild spacetime
Giampiero Esposito, Marco Refuto
For a massive scalar field in a fixed Schwarzschild background, the radial wave equation obeyed by Fourier modes is first studied. After reducing such a radial wave equation to its…