Large-scale quantum phenomena in spin systems

大尺度量子现象在凝聚态系统中特别有趣，尽管它们也在粒子理论和宇宙学中进行了研究。对它们的理论理解需要从退相干理论和环境中的非平衡过程理论中得到广泛的结果。目前的工作集中在cerain统计力学模型（特别是模型的自旋网络耦合到环境模拟振荡器或自旋浴），并在其应用到真实的系统。这样的系统包括磁性分子或稀土自旋的网络或阵列，或超导SQUIDS。该模型也可应用于量子自旋玻璃或偶极玻璃。最后，在这个项目中，我们还将研究固体He-3，我们相信在其中可以观察到涉及宏观畴壁的壮观量子现象。

Large-scale quantum phenomena are particularly interesting in condensed matter systems, although they have also been studied in particle theory and cosmology. Their theoretical understanding needs extensive results from the theory of decoherence and non-equilibrium processes in the environment. The present work focuses on cerain statistical mechanical models (notably on models of spin networks coupled to environments modelled by oscillator or spin baths), and on their application to real systems. Such systems include networks or arrays of magnetic molecules or rare earth spins, or of supeconducting SQUIDS. The models also can be applied to quantum spin glasses or dipolar glasses. Finally, in this project we will also look at solid He-3, in whihc we believe that spectacular quantum phenomena involving macroscopic domain walls may be observable.