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arXiv · 2607.13572

Quantum-classical crossover in finite spin-1/2 rings with Dzyaloshinsky-Moriya interaction

Raúl Sánchez Galán·Robert Wieser
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Abstract

We study finite spin-$\tfrac12$ rings with nearest-neighbor Heisenberg exchange, Dzyaloshinsky--Moriya interaction, and an external magnetic field. We introduce an interpolation parameter between the fully quantum Hamiltonian and a state-dependent mean-field description. Using dissipative Gisin--Schr\"odinger dynamics, we analyze the resulting quantum--classical crossover through local magnetization, connected spin correlations, single-site entropy, and the saturation field of the fully polarized state.

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Raúl Sánchez Galán, Robert Wieser. 2026-07-15. Quantum-classical crossover in finite spin-1/2 rings with Dzyaloshinsky-Moriya interaction. https://arxiv.org/abs/2607.13572

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