内容摘要 This book explains the fundamental concepts and theoretical techniques used to understand the properties of quantum systems having large numbers of degrees of freedom. A number of complimentary approaches are developed, including perturbation theory; nonperturbative approximations based on functional integrals; general arguments based on order parameters, symmetry, and Fermi liquid theory; and stochastic methods.本书解释了用于理解具有大量自由度的量子系统特性的基本概念和理论技术。许多互补的方法被开发出来,包括微扰理论;基于函数积分的非微扰近似;基于序参数、对称性和费米液体理论的一般论点;和随机方法。
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