840 citations · 3.6k across the 110 of their papers we have counts for
4 papers · 2 filters
Is Hilbert space discrete?
R. Buniy, S. Hsu, A. Zee
We show that discretization of spacetime naturally suggests discretization of Hilbert space itself. Specifically, in a universe with a minimal length (for example, due to quantum g…
Minimum Length from First Principles
Xavier Calmet, Michael Graesser, Stephen D. H. Hsu
We show that no device or gedanken experiment is capable of measuring a distance less than the Planck length. By "measuring a distance less than the Planck length" we mean, technic…
Semi-classical wormholes and time machines are unstable
Roman V. Buniy, Stephen D. H. Hsu
We show that Lorentzian (traversable) wormholes and time machines with semi-classical spacetimes are unstable due to their violation of the null energy condition (NEC). Semi-classi…
Instabilities and the null energy condition
Roman V. Buniy, Stephen D. H. Hsu
We show that violation of the null energy condition implies instability in a broad class of models, including classical gauge theories with scalar and fermionic matter as well as a…