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Featured Research: Negative Quantum Vacuum Entropy is Puzzling

It has recently been discovered that nearby objects, such as conducting spheres, atoms, or nanoparticles, interacting through the quantum vacuum, exhibit regions where the entropy of the system goes negative.  This occurs when the temperature times the separation distance (in natural units) is of order one.  The physical significance of this surprising result is still under investigation, and was the subject of two recent papers of Kim Milton with prominent German and French theorists. 

Whether the negative entropy discovered has anything to…

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