The Peculiar Status of the Second Law of Thermodynamics and the Quest for its Violation

TL;DR

This paper questions the absolute status of the second law of thermodynamics, arguing it could be violated at macroscopic scales due to thermal fluctuations, and challenges information-theoretic explanations for its inviolability.

Contribution

It proposes a modified Szilard engine that operates without information creation or destruction, suggesting thermal fluctuations and friction are the true reasons for the law's robustness.

Findings

Thermal fluctuations and friction prevent Maxwell's demon from violating the second law.

Information-theoretic principles like Landauer's fall short of explaining the law's inviolability.

A modified Szilard engine can operate without information steps, questioning the necessity of information-based explanations.

Abstract

Even though the second law of thermodynamics holds the supreme position among the laws of nature, as stated by many distinguished scientists, notably Eddington and Einstein, its position appears to be also quite peculiar. Given the atomic nature of matter, whose behaviour is well described by statistical physics, the second law could not hold unconditionally, but only statistically. It is not an absolute law. As a result of this, in the present paper we try to argue that we have not yet any truly cogent argument (known fundamental physical laws) to exclude its possible macroscopic violation. Even Landauer's information-theoretic principle seems to fall short of the initial expectations of being the fundamental `physical' reason of all Maxwell's demons failure. Here we propose a modified Szilard engine which operates without any steps in the process resembling the creation or destruction of information. We argue that the information-based exorcisms must be wrong, or at the very least superfluous, and that the real physical reason why such engines cannot work lies in the ubiquity of thermal fluctuations (and friction). We see in the above peculiar features the main motivation and rationale for pursuing exploratory research to challenge the second law, which is still ongoing and probably richer than ever. A quite thorough (and critical) description of some of these challenges is also given.