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math-ph2026
Finite- and long-range spin-wave free-energy asymptotics for the two-dimensional quantum Heisenberg ferromagnet
Andreas Klippel
For the two-dimensional quantum Heisenberg ferromagnet with asymptotically radial power-law exchange, we prove the leading low-temperature free energy at every fixed spin, uniforml…
math-ph2026
Free-Energy Asymptotics of the Two-Dimensional Quantum Heisenberg Ferromagnet
Andreas Klippel
We prove the leading low-temperature free-energy asymptotics of the nearest-neighbour quantum Heisenberg ferromagnet on . For every fixed $S\in\{\frac12,1,\frac32,\ldo…