652 citations · 8.8k across the 142 of their papers we have counts for
142 papers
de Sitter space is sometimes not empty
Vijay Balasubramanian, Yasunori Nomura, Tomonori Ugajin
Multiple lines of evidence suggest that the Hilbert space of an isolated de Sitter universe is one dimensional but can appear larger when probed by a gravitating observer. To test…
Black Hole and de Sitter Microstructures from a Semiclassical Perspective
Chitraang Murdia, Yasunori Nomura, Kyle Ritchie
We describe two different, but equivalent semiclassical views of black hole physics in which the equivalence principle and unitarity are both accommodated. In one, unitarity is bui…
The Multiverse in an Inverted Island
Kevin Langhoff, Chitraang Murdia, Yasunori Nomura
We study the redundancies in the global spacetime description of the eternally inflating multiverse using the quantum extremal surface prescription. We argue that a sufficiently la…
An Information Paradox and Its Resolution in de Sitter Holography
Hao Geng, Yasunori Nomura, Hao-Yu Sun
We formulate a version of the information paradox in de Sitter spacetime and show that it is solved by the emergence of entanglement islands in the context of the DS/dS corresponde…
From the Black Hole Conundrum to the Structure of Quantum Gravity
Yasunori Nomura
We portray the structure of quantum gravity emerging from recent progress in understanding the quantum mechanics of an evaporating black hole. Quantum gravity admits two different…
Black Hole Interior in Unitary Gauge Construction
Yasunori Nomura
A quantum system with a black hole accommodates two widely different, though physically equivalent, descriptions. In one description, based on global spacetime of general relativit…