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

2026/07/15 by Raúl Sánchez Galán, Robert Wieser
#cond-mat.str-el #math-ph #math.MP

paper · pdf

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--Schrödinger 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.

Citations

• Anisotropic Superexchange Interaction and Weak Ferromagnetism

Related

• Prefect Transfer of Quantum States on Spin Chain with Dzyaloshinskii- Moriya interaction in inhomogeneous Magnetic field
• Loss of classicality in alternating spin-(1)/(2)/spin-1 chain, in the presence of next-neighbor couplings and Dzyaloshinskii-Moriya interactions
• Competing quantum effects in spin crossover chains: spin-orbit coupling, magnetic exchange, and elastic interactions
• A Question: Quantum Critical Phenomena in XY Spin-Chain Systems With Dzyaloshinskii-Moriya Interactions
• Electronic exchange in quantum rings