Freitag, 10. Juli 2026 17:00 Uhr Negative Energy
Prof. Ph.D. Stefan Hollands , Theoretische Physik, Universtät Leipzig Negative Energy Prof. Ph.D. Stefan Hollands Theoretische Physik, Universtät Leipzig Ordinarily, the actual energy is not physically significant but only energy differences are. But in general relativity, the absolute energy (density) appears on the right side of the Einstein equations as a component of the stress tensor. In this colloquium I explore how negative energy densities are thereby related to exotic phenomena such as warp drive spacetimes or wormholes. I outline how quantum fluctuations enable negative energies and can be tiny, e.g. in the halos of black holes, or astronomical, e.g. inside black holes. In many interesting cases, the laws of physics limit the amount of possible negative energy. Such laws, such as the quantum null- or quantum dominant energy conditions, can be seen as a fundamental bridge between gravity and quantum information.
