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GR: Fachverband Gravitation und Relativitätstheorie

GR 2: Classical Theory

GR 2.3: Vortrag

Montag, 21. März 2022, 16:40–17:00, GR-H2

Energy Conditions in Reverse-Engineered Metrics — •Sebastian Schuster¹, Jessica Santiago², and Matt Visser³ — ¹Charles University, Prague, Czech Republic — ²Aristotle University of Thessaloniki, Thessaloniki, Greece — ³Victoria University of Wellington, Wellington, New Zealand

Many familiar metrics of general relativity have been achieved by integrating the Einstein equations for a particular source stress-energy tensor. In other cases, physical considerations lead to a motivation for studying metrics of a particular form; here, then, the question is to derive the stress-energy tensor from a given metric. While mathematically simpler---as differentiation is simpler than integration---this opens a long list of questions which stress-energy tensors should be considered physical. An early heuristic for such an evaluation were so-called energy conditions. In this talk, we will describe a proof for why ``warp drives'' will always violate pointwise energy conditions, and how even rather benign, reverse-engineered metrics (``tractor beams'') will do so.