Lotka-Volterra models for extraterrestrial self-replicating probes

Area of Science:

• Astrobiology
• Theoretical Physics
• Ecology

Background:

• The Fermi paradox questions the absence of observable extraterrestrial civilizations.
• Self-replicating probes are a hypothetical method for galactic exploration by advanced civilizations.
• Previous research suggested probe mutations might limit their numbers, but this is debated.

Purpose of the Study:

• To re-evaluate the impact of mutations on self-replicating probe populations.
• To investigate if mutated probes could limit or accelerate galactic colonization.
• To inform the design principles of future self-replicating probes.

Main Methods:

• Utilized a Lotka-Volterra model, a predator-prey ecological model, to simulate probe dynamics.
• Analyzed the interaction between progenitor probes and mutated variants.
• Examined the long-term population trends under different mutation scenarios.

Main Results:

• Mutated probes do not significantly reduce the total number of self-replicating probes.
• Mutated probes can drive progenitor probes to extinction, effectively replacing them.
• The galactic spread of probes may be more efficient than previously assumed.

Conclusions:

• The proliferation of self-replicating probes, even with mutations, remains a plausible scenario for galactic exploration.
• Mutations may enhance, rather than hinder, probe colonization.
• Probe design should consider that failure to recognize 'self' due to mutation may not limit probe numbers.