Can the Infamous Boundary Be Found in Macromolecules? Also, von Neumann vs. Schroedinger ensembles, and `Hund's Paradox' in quantum chemistry

TL;DR

This paper explores the elusive boundary between classical and quantum physics, proposing that it may be found at the macromolecular level, and links this to thermal ensembles and Hund's Paradox, suggesting an experimental approach to detect it.

Contribution

It introduces the idea that the classical-quantum boundary might be located within macromolecules and connects this to thermal ensemble choices and Hund's Paradox, proposing an experimental test.

Findings

Potential to detect the classical-quantum boundary in macromolecules

Connection between thermal ensembles and Hund's Paradox

Proposed experimental setup for revealing the boundary

Abstract

John Bell coined the phrase ``Infamous Boundary" for the point where classical physics splits off from quantum physics. Many authors, including the present one, have advanced theories with the intention of defining and locating this ``shifty split"; most propose that it lies somewhere on the scale of apparatus. But what if it resides at the level of macromolecules? I show here that this question is intimately connected to the choice of thermal ensembles and to the so-called `Hund's Paradox' in quantum chemistry. I propose an experimental set-up that could in principle reveal the IB lurking in asymmetric macromolecules.