Mar 24, 2016 · This is correct. But the claim that it is only in the case of negative r that dϕ can be timelike and CTCs are present is true only for the simple Kerr spacetime. In the Kerr-Newman …

May 10, 2023 · 7 There are spacetimes that admit closed timelike curves (for example a cylinder, Gödel's Universe, the Kerr-Solution). But what does it physically mean to move along a closed …

Apr 11, 2018 · The reason closed timelike curves are harder to form than closed spacelike curves is because although there's only one timelike dimension, there's more than one spacelike …

Jun 25, 2022 · Entering into a closed timelike curve places limits on what possibilities can unfold in your future, specifically during the loop (the time between Harry2 appearing in that past and …

Dec 20, 2017 · A time-like curve is a curve on the manifold whose tangent vector is everywhere time-like (and therefore a possible world line for a material particle). A closed time-like curve is …

Jun 27, 2015 · 12 To know what a closed timelike curve looks like, you just do like every spacetime metric. You compute geodesics and field equations and all of that. Unfortunately, …

I am well-aware that the existence of closed timelike curves implies that time travel is technically possible, but this argument for why they should not exist isn't convincing to me. For one, if the …

Jul 23, 2025 · There are spacetimes that admit closed timelike curves (for example a cylinder, Gödel's Universe, the Kerr-Solution). But what does it physically mean to move along a closed …

Apr 23, 2025 · Then again, the black hole in that picture isn’t special. If you can go on a spacelike curve at all, you can lead back into your own past, without necessarily needing to enter a black …

Apr 11, 2015 · I've been looking a lot at Closed Timelike Curves, and how if a theory allows for these curves it doesn't respect causality. I understand that about the curves themselves …