Popular Boards
1 Mentions
S. Krasnikov | Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields | (1998)
Key Takeaways
Sample Definition And Size
The paper is a theoretical analysis and does not involve empirical subjects or sample sizes. It explores the possibility of a traveler manipulating spacetime geometry to achieve faster-than-light round-trip travel under general relativity.
Study Type
The study is a theoretical, analytical investigation in general relativity, exploring causal structure and spacetime geometry modifications (e.g., wormholes, Krasnikov tube).
Conflicts Of Interest
No conflicts of interest are declared in the paper.
Results Summary
The key findings are: (1) Under reasonable assumptions in globally hyperbolic spacetimes, a traveler cannot reach a destination faster than a photon. (2) However, it may be possible to perform an arbitrarily long round-trip in an arbitrarily short time as measured by a terrestrial observer, by partially controlling spacetime geometry (e.g., via wormholes or Krasnikov-type constructions) ([researchgate.net](https://www.researchgate.net/publication/1974581_Hyperfast_Interstellar_Travel_in_General_Relativity?utm_source=openai)).
Abstract
The problem is discussed of whether a traveler can reach a remote object and return sooner than a photon would when taking into account that the traveler can partly control the geometry of his world. It is argued that under some reasonable assumptions in globally hyperbolic space-times the traveler cannot hasten reaching the destination. Nevertheless, it is perhaps possible for the traveler to make an arbitrarily long round-trip within an arbitrarily short (from the point of view of a terrestrial observer) time.
What about causality, according to special relativity, information that travels faster than light in some frames of references travels backwards in time, which means paradoxes like response to a message arrives before the message sent... Generally this means any warp drive is basically a time machine. Hyperfast travel in general relativity