Thermodynamic model explains pressure and edge currents in spinning particle gas

Physicists from Heinrich Heine University Düsseldorf, the Technical University of Darmstadt, Sapienza University in Rome, and the University of Camerino in Italy have published a study in the *Proceedings of the National Academy of Sciences* (PNAS) that extends the laws of thermodynamics to a novel class of gases composed of spinning particles. By developing a theoretical framework that incorporates the intrinsic angular momentum of the constituents, the team showed that the pressure of such a gas behaves in a manner analogous to a conventional gas, but the effective temperature required to achieve the same pressure is markedly higher.

The analysis reveals that the rotational degrees of freedom give rise to localized surface currents within the gas. These currents, which flow along the boundaries of the system, can be harnessed to induce directed transport of individual particles, offering a new mechanism for manipulating matter at microscopic scales. The authors suggest that these findings could inform the design of advanced particle‑sorting devices and contribute to the development of spin‑based thermodynamic engines.

The study represents a significant step toward understanding how spin and thermal properties intertwine in non‑equilibrium systems. By bridging classical thermodynamics with quantum‑spin effects, the researchers have opened avenues for future experimental verification and potential technological applications in nanofluidics and spintronics.