具有高阶梯度项的$O(2)$鬼模型中的三相点
Triple point in the $O(2)$ ghost model with higher-order gradient term
摘要：
在Wegner和Houghton的重整化群框架下，研究了三维$O(2)$对称鬼标量场$ϕ$的相结构和红外行为，包括动力学项的高阶导数.它指出，高导数耦合提供了三个阶段，并导致一个三相点在RG计划。相变的类型也已确定。
英文摘要：
The phase structure and the infrared behaviour of the Euclidean 3-dimensional $O(2)$ symmetric ghost scalar field $ϕ$ has been investigated in Wegner and Houghton's renormalization group framework, including higher-derivatives in the kinetic term. It is pointed out that higher-derivative coupling provides three phases and leads to a triple point in that RG scheme. The types of the phase transitions have also been identified.
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