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hep-th2025
Composite AdS geodesics for CFT correlators and timelike entanglement entropy
Hardik Bohra, Allic Sivaramakrishnan
We study how to recover timelike worldlines in AdS from CFT data as a toy model for holographically reconstructing realistic observers. We give a bulk extremization procedure that…
hep-th2025
Observer Time from Causality in Perturbative Quantum Gravity
Allic Sivaramakrishnan
It is unclear whether an observable notion of time exists in quantum gravity even in principle because spacetime itself fluctuates. We propose a form of observable time in perturba…
hep-th2025
Correlation functions of von Neumann entropy
Mathew W. Bub, Allic Sivaramakrishnan
In this note, we study two-point correlation functions of modular Hamiltonians. We show that in general quantum systems, these correlators obey properties similar to those of von N…