相对论相互作用玻色气体的经典场方法
Classical fields method for a relativistic interacting Bose gas
摘要:
我们提出了一种描述非零温度下相对论性相互作用玻色子的经典场方法。该方法依赖于这样的假设,即在低温下,玻色场可以由一个c数函数来描述。我们讨论了截断动量的一个非常重要的作用,它将场分为占主导地位的经典部分和一个小的量子修正。我们通过研究一个相对论玻色场的热力学来说明这种方法,该场的动力学由Klein-Gordon方程控制,其中$λψ^4$项负责相互作用。
英文摘要:
We formulate a classical fields method for description of relativistic interacting bosonic particles at nonzero temperatures. The method relays on the assumption that at low temperatures the Bose field can be described by a c-number function. We discuss a very important role of the cut-off momentum which divides the field into dominant classical part and a small quantum correction. We illustrate the method by studying a thermodynamics of relativistic Bose field which dynamics is governed by the Klein-Gordon equation with $λψ^4$ term responsible for interactions.
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