The Universal Law of Life Systems: Entropy Resistance and the Nature of Living Systems
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The absence of a universal, physically grounded definition of life remains a criticalshortcoming across biology, astrobiology, and artificial intelligence. While traditionaldefinitions rely on biochemical functions or evolutionary heuristics, none offer a crite-rion applicable across substrates, scales, or domains.This paper proposes a general law: a system is alive if and only if it sustains apositive rate of entropy resistance. Formally, in the quantum regime:Rq (t) =−d/dtTr(ρ(t) ln ρ(t)) >0where ρ(t) is the system’s density matrix and the trace defines the von Neumannentropy. The law is substrate-independent, operationally measurable, and falsifiable.This formulation offers a unifying condition for terrestrial biology, synthetic organ-isms, coherent quantum systems, and potential extraterrestrial life — without invokingreplication, metabolism, or evolution. It reframes life not as a biological artifact but asa thermodynamic process that persistently resists informational and entropic collapse.Life, in this framework, is not explained by physics. It is a distinct phase of physics— defined by its active resistance to the universe’s default trajectory.