Information-Thermodynamic Technosignatures: A Feasibility Framework

This paper presents a feasibility framework for information-thermodynamic technosignatures: observable signatures of extraterrestrial technology grounded in information thermodynamics. It applies Landauer's principle and entropy analysis to the search for extraterrestrial intelligence (SETI), assessing the energetic and informational costs of large-scale technological activity and the resulting detectable waste-heat and entropy signatures. The framework evaluates candidate technosignature scenarios including Dyson swarms, Kugelblitz black-hole engines, and the Solar Cradle concept, and examines the physical limits and observational prospects for detecting such signatures.