126 citations · 369 across the 19 of their papers we have counts for
19 papers
A causal limit to communication within an expanding cosmological civilization
S. Jay Olson
If a civilization embarks on high-speed intergalactic expansion, growing to a cosmological scale over time, communication between remote galaxies in the civilization will incur an…
Implications of a search for intergalactic civilizations on prior estimates of human survival and travel speed
S. Jay Olson, Toby Ord
We present a model where some proportion of extraterrestrial civilizations expand uniformly over time to reach a cosmological scale. We then ask what humanity could infer if a sky…
On the Likelihood of Observing Extragalactic Civilizations: Predictions from the Self-Indication Assumption
S. Jay Olson
Ambitious civilizations that expand for resources at an intergalactic scale could be observable from a cosmological distance, but how likely is one to be visible to us? The questio…
Expanding cosmological civilizations on the back of an envelope
S. Jay Olson
We present a simplified description of expansionistic life in the standard relativistic cosmology. The resulting model is exactly integrable, yielding a simple set of predictive fo…
Life-hostile conditions in the early universe can increase the present-day odds of observing extragalactic life
S. Jay Olson
High-energy astrophysical events that cause galaxy-scale extinctions have been proposed as a way to explain or mollify the Fermi Paradox, by making the universe at earlier times mo…
Long-term implications of observing an expanding cosmological civilization
S. Jay Olson
Suppose that advanced civilizations, separated by a cosmological distance and time, wish to maximize their access to cosmic resources by rapidly expanding into the universe. How do…