https://doi.org/10.1140/epjp/s13360-025-06695-1
Regular Article
Thermodynamic geometry of two coupled spins via various Ising Hamiltonians
Department of Physics, University of Mohaghegh Ardabili, P.O. Box 179, Ardabil, Iran
Received:
7
February
2025
Accepted:
26
July
2025
Published online:
11
August
2025
We investigate the thermodynamic geometry of systems composed of two coupled spins governed by different Ising Hamiltonians. We construct the thermodynamic parameters space and evaluate the related metric elements. Moreover, we analyze how these geometric structures change with variations in system parameters, such as coupling constants and external magnetic fields. We show that different models exhibit distinct features in thermodynamic parameters space based on the sign of thermodynamic curvature. These insights refine our understanding of the macroscopic thermodynamic behavior emerging from microscopic spin interactions.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
