Time travelling in emergent spacetime

TL;DR

This paper explores how emergent spacetime from quantum gravity theories impacts the possibility of time travel, questioning whether quantum effects could enable or prevent closed timelike curves.

Contribution

It analyzes the implications of emergent spacetime on the existence of closed timelike curves, offering insights into how quantum gravity might alter traditional views on time travel.

Findings

Quantum gravity may alter the conditions for closed timelike curves.

Emergent spacetime could either prevent or permit time travel scenarios.

The paper provides a theoretical framework for understanding time travel in quantum gravity contexts.

Abstract

Most approaches to quantum gravity suggest that relativistic spacetime is not fundamental, but instead emerges from some non-spatiotemporal structure. This paper investigates the implications of this suggestion for the possibility of time travel in the sense of the existence of closed timelike curves in some relativistic spacetimes. In short, will quantum gravity reverse or strengthen general relativity's verdict that time travel is possible?