Timelike Entanglement Signatures of Ergodicity and Spectral Chaos
This paper demonstrates that timelike entanglement measures derived from the spacetime density kernel in the Rosenzweig-Porter model, including Tsallis entropy, imagitivity, and a newly defined kernel negativity, serve as sharp diagnostics for distinguishing between ergodic, fractal, and localized phases by exhibiting distinct growth patterns, spectral form factor-like structures, and correlations with fractal dimensions.