3 papers
hep-th2026
Scalar Finite-Proper-Time Field Theory as Spectral Operator Calculus
Mustafa Bakr, Tongyu Zhang
We formulate a finite-proper-time construction for Euclidean scalar theory in which a retained endpoint is assigned to complete internal histories rather than independ…
math-ph2025
Electromagnetic Modes in Spherical Cavities: Complete Theory of Angular Spectra, Dispersion Relations, and Self-Adjoint Extensions
Mustafa Bakr, Tongyu Zhang, Smain Amari
We present a complete theory of electromagnetic modes in spherical cavities, resolving fundamental questions about the nature of angular quantization. The standard result that angu…
gr-qc2024
Discontinuities in the Evolution of Properties of Kerr Black Holes in the Extremal Limit
Tongyu Zhang, Moe Vali
Ever since its discovery by Roy Kerr in 1963, the geometry around rotating, electrostatically-neutral black holes, otherwise known as Kerr black holes, has significantly contribute…