Temporal correlations and chaos from spacetime kernels
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Abstract
We develop a finite-dimensional formulation of the recently introduced notion of “timelike entanglement”, defined in terms of two-point functions between operators supported on different Cauchy slices. Using a local orthonormal operator basis, we recast this construction in terms of a generalized response tensor. Building on this, we introduce a generalized spacetime density kernel (GSDK) corresponding to higher point correlation functions, including time-ordered as well as out-of-time-ordered correlators. Motivated by the structure of Haar probe averaging, we contract the (2N)-leg GSDK with cyclic permutation operators and thereby define a kernel form factor. This quantity is computable even when Haar averaging is not feasible, and it reduces to the (2N)-th moment of the spectral form factor, evaluated at an N-enhanced effective temperature. The correlation functions of the GSDK operators also yield the SFF, with an effective (1/N)-reduction of the physical time-scales. The GSDK places both early time scrambling diagnostics and late time spectral statistics on a similar footing and clarifies how higher-point correlators and non-trivial time ordering capture fine-grained dynamical information of a quantum system.
Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 141 |
| Fachzeitschrift | Journal of high energy physics |
| Jahrgang | 2026 |
| Ausgabenummer | 4 |
| Publikationsstatus | Veröffentlicht - Apr. 2026 |
| Peer-Review-Status | Ja |
Schlagworte
ASJC Scopus Sachgebiete
Schlagwörter
- Algorithms and Theoretical Developments, Correlation Functions, Space-Time Symmetries