论文标题
双旋转耦合的量子和经典相变
Spin-spin coupling-based quantum and classical phase transitions in two-impurity spin-boson models
论文作者
论文摘要
研究了旋转对上带有消失的横向场的两种相互作用 - 脉冲旋转玻色子模型。该模型可以精确地映射到两个独立的标准单障碍旋转玻色子模型中，其中通过自旋旋转耦合扮演隧道参数的作用。分析了不同水平的（AN）各向同性的磁化动力学。此外，在OMHIC策略中，存在无腐蚀的子空间以及古典和量子（一阶和Kosterlitz-无尽的）相变的存在。
The class of two-interacting-impurity spin-boson models with vanishing transverse fields on the spin-pair is studied. The model can be exactly mapped into two independent standard single-impurity spin-boson models where the role of the tunnelling parameter is played by the spin-spin coupling. The dynamics of the magnetization is analysed for different levels of (an)isotropy. Further, the existence of a decoherence-free subspace as well as of both classical and quantum (first-order and Kosterlitz-Thouless type) phase transitions, in the Omhic regime, is brought to light.
