We simulate scattering of electrons by a chain of antiferromagnetically coupled quantum Heisenberg spins, to analyze spin-transfer effects not described by the classical models of magnetism. Our simulations demonstrate efficient excitation of dynamical states that would be forbidden by the semiclassical symmetries, such as generation of multiple magnetic excitation quanta by a single electron. Furthermore, quantum interference of spin wave functions enables generation of magnetization dynamics with amplitudes exceeding the transferred magnetic moment. The efficiency of excitation is almost independent of the electron spin polarization, and is governed mainly by the transfer of energy. Nonclassical spin transfer may thus enable efficient electronic control of antiferromagnets not limited by the classical constraints.

中文翻译：

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反铁磁体中的非经典自旋转移效应

我们通过反铁磁耦合的量子海森堡自旋链模拟电子的散射，以分析经典磁性模型未描述的自旋转移效应。我们的仿真表明，半经典对称性会禁止动力学状态的有效激发，例如单个电子产生多个磁激发量子。此外，自旋波函数的量子干涉使得能够产生振幅超过所传递的磁矩的磁化动力学。激发效率几乎与电子自旋极化无关，并且主要由能量转移决定。因此，非经典自旋传递可以实现不受经典约束限制的反铁磁体的有效电子控制。