Experimental benchmark of the quantum-classical crossover in a spin ladder

• URL: http://arxiv.org/abs/2512.12234v1
• Date: Sat, 13 Dec 2025 08:16:54 GMT
• Title: Experimental benchmark of the quantum-classical crossover in a spin ladder
• Authors: Hironori Yamaguchi, Itsuki Shimamura, Akira Matsuo, Koichi Kindo, Koji Araki, Yoshiki Iwasaki, Masayuki Hagiwara,
• Abstract summary: A three-leg ladder with an antiferromagnetic transition and magnetization curves is realized in a radical-Mn polymer.<n>Although the underlying spin model intrinsically supports strong quantum fluctuations, the real system shows an anomalously complete suppression of quantum behavior.<n>These findings provide a key experimental benchmark for the quantum-classical crossover and suggest that lattice topology can play a crucial role in tuning the balance between quantum and classical physics in strongly correlated systems.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We report a spin-(1/2, 5/2) three-leg ladder realized in a radical-Mn polymer, exhibiting an antiferromagnetic transition and magnetization curves accurately described by classical mean-field theory. Although the underlying spin model intrinsically supports strong quantum fluctuations, as confirmed by quantum Monte Carlo simulations, the real system shows an anomalously complete suppression of quantum behavior. These findings provide a key experimental benchmark for the quantum-classical crossover and suggest that lattice topology can play a crucial role in tuning the balance between quantum and classical physics in strongly correlated systems.

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