From the body of the paper: > Such a craft accelerating at a constant 1000g for half of the trip and decelerating at the same rate for the remaining half would

From the body of the paper: > Such a craft accelerating at a constant 1000g for half of the trip and decelerating at the same rate for the remaining half would reach Proxima Centuri within 5 days’ ship time due to the fact that it would have been traveling at relativistic speeds for most of the trip (Figure 7B). However, for those of us on Earth, or anyone on Proxima Centuri b, the trip would take over four years.