6 papers
On Perturbatively Dressed Observables
Clifford Cheung, Allic Sivaramakrishnan, Jordan Wilson-Gerow +1
A central lesson of gravity is that local observables are ill-defined. Coordinates themselves are a redundancy of description, so any particular point in spacetime is only meaningf…
Response of interferometers to the vacuum of quantum gravity
Daniel Carney, Manthos Karydas, Allic Sivaramakrishnan
It has recently been suggested that exotic quantum gravity effects could lead to large vacuum fluctuations, potentially observable with realistic detectors. Experiments are current…
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…
An On-Shell Derivation of the Soft Effective Action in Abelian Gauge Theories
Temple He, Prahar Mitra, Allic Sivaramakrishnan +1
We derive the soft effective action in -dimensional abelian gauge theories from the on-shell action obeying Neumann boundary conditions at timelike and null infinity and Dir…
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…
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…