Macroscopic Quantum Phenomena in Small Magnetic Particles

的总磁化强度的量子力学隧穿 将研究尺寸为100A的小磁性颗粒 理论上 建议的工作重点是耗散耦合 例如在几何形状中的不同颗粒之间， 粒子、单个粒子中的旋转波以及传导 金属粒子中的电子 计算将被扩展 有限的温度，和现实的晶体各向异性能量 超越了由对称性决定的主导秩序形式。 的组合 的路径积分和微扰方法将被使用，包括 数值和分析方法。

The quantum mechanical tunneling of the total magnetization of small magnetic particles of size 100A will be studied theoretically. The proposed work focuses on dissipative couplings such as that between different grains in a geometry involving many particles, to spin waves in a single particle, and to conduction electrons in metallic particles. The calculations will be extended to finite temperature, and realistic crystal anisotropy energies beyond the leading order forms dictated by symmetry. A combination of path integral and perturbative methods will be used, involving both numerical and analytical methods.