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Dynamical response of local magnetic structures induced by inhomogeneities to time-dependent magnetic field

机译：不均匀性引起的局部磁性结构对时变磁场的动力响应

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摘要

Local magnetic structures induced by the bond impurities in the S = 1/2 bond alternating system are found to be looked on as an effective S = 1/2 spin at low temperatures. The response of such structures to a time dependent magnetic field as an interesting problem to study and it would be important for the analysis of the nanoscale materials. In realistic systems the effect of coupling to the environment cause fluctuation and dissipation and plays a crucial role in such dynamics. We study the tunneling process in noise by solving the time-dependent Schrodinger equation numerically from the viewpoint of nonadiabatic transition in the two level system, and make clear basic properties. We investigate the dependence of the tunneling probability on sweeping velocity of the applied field and also on the direction of the random noise and its relaxation time.
机译：由于在低温下有效的S = 1/2自旋，因此发现了由S = 1/2键交替系统中的键杂质引起的局部磁性结构。这种结构对时间相关磁场的响应是一个有趣的研究问题，对于纳米级材料的分析非常重要。在现实的系统中，耦合到环境的影响会引起波动和耗散，并在这种动力学中起关键作用。从二级系统的非绝热跃迁的角度，通过数值求解时间相关的薛定inger方程，研究了噪声中的隧穿过程，并阐明了其基本性质。我们研究了隧道概率对所施加场的扫掠速度以及随机噪声的方向及其弛豫时间的依赖性。

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