5 papers
Subregion observer rules from generalized entanglement wedges
Lana Bozanic, Kenneth Higginbotham, Chris Waddell
We consider rules for modifying holographic tensor networks proposed in two independent contexts: by the Colorado (CO) group in 2503.09681 to incorporate observers in holographic m…
Helping observers in closed universes reach their full potential
Kenneth Higginbotham
Recent work by Engelhardt, Gesteau, and Harlow applies proposals for incorporating observers into holographic maps to study the Antonini-Rath puzzle for closed universes. In a new…
On tests for baby universes in AdS/CFT
Kenneth Higginbotham
To address a puzzle by Antonini and Rath -- where a single CFT state has two bulk duals, one with a baby universe and one without -- Engelhardt and Gesteau recently devised a test…
On observers in holographic maps
Chris Akers, Gracemarie Bueller, Oliver DeWolfe +3
A straightforward gravitational path integral calculation implies that closed universes are trivial, described by a one dimensional Hilbert space. Two recent papers by Harlow-Usaty…
The horocycle regulator: exact cutoff-independence in AdS/CFT
Sristy Agrawal, Oliver DeWolfe, Kenneth Higginbotham +1
While the entanglement entropy of a single subregion in quantum field theory is formally infinite and requires regularization, certain combinations of entropies are perfectly finit…