Misner space

Misner space is an abstract mathematical spacetime, discovered by Charles Misner of the University of Maryland. It is also known as the Lorentzian orbifold $\mathbb {R} ^{1,1}/{\text{boost}}$.

An intuitive analogy may be drawn with a video game screen, where a screen element exits the frame through the right side, only to re-enter the frame right away through the left side.

Moving the spatial limits (e.g.: the walls of a room) enclosing an existing Misner space in the physical world, could theoretically lead to time travel.

References

• M. Berkooz, B. Pioline, M. Rozali. Closed Strings in Misner Space: Cosmological Production of Winding Strings, Journal of Cosmology and Astroparticle Physics.