2 papers
gr-qc2025
James Burkett Hartle: a Biographical Memoir
Gary T. Horowitz, Kip S. Thorne
James Burkett Hartle was a theoretical physicist who made major contributions to our understanding of relativistic stars, black holes, and cosmology. Most of his career, however, w…
hep-th2025
Arbitrarily Negative Energy for Small Kaluza-Klein Bubbles
Gary T. Horowitz, Guanyu Lu
We show that the ADM energy of a Kaluza-Klein bubble of nothing is unbounded from below even if the size of the circle at infinity and the size of the minimal sphere at the bubble…