激子相干态：对称性和热化
Excitonic coherent states: symmetries and thermalization
摘要：
在以前的工作[1]中，我们基于Keldysh猜想，提出了一种新的有界相干态的构造方法。如文[1]所示，由该模型产生的特殊的群结构导致了相干态系统的新的对称变换。正如所示，新兴的新的对称性变换是令人想起的Bogoliubov的，并成功地应用于描述激子系统，显示出本质上与稳定性和它的一般物理行为。该模型的群论结构允许在理论框架中分析其热性质，这些理论框架是由于将压缩相干态定义为在对易关系的自同构群下的变换真空而产生的，如梅泽和其他类似发展给出的热场动力学情况[5]。另一方面，半导体中激子的可能的玻色-爱因斯坦凝聚（BEC）的想法已经吸引了实验学家和理论家超过三十年的注意力，这是在这种凝聚确实存在的情况下，非零温度的影响会发生什么的主要问题之一[2]。在本文中，我们考虑的激子行为的理论处理手段是一个新的相干态的建设有界态的量子场论的背景下。
英文摘要：
In previous work [1] new bounded coherent states construction, based on a Keldysh conjecture, was introduced. As was shown in [1] the particular group structure arising from the model leads to new symmetry transformations for the coherent states system. As was shown, the emergent new symmetry transformation is reminiscent of the Bogoliubov ones and was successfully applied to describe an excitonic system showing that is intrinsically related to the stability and its general physical behavior. The group theoretical structure of the model permits to analyze its thermal properties in theoretical frameworks that arise as a consequence of the definition of the squeezed-coherent states as transformed vacua under the automorphism group of the commutation relations, as the thermofield dynamics case given by Umezawa and other similar developments [5]. On the other hand, the idea of a possible Bose--Einstein condensation (BEC) of excitons in semiconductors has attracted the attention of both experimentalists and theoreticians for more than three decades being one of the main questions what happens with the influence of non zero temperature in the case that such condensation really exists [2]. In this paper we considered the theoretical treatment of the excitonic behaviour by mean a new coherent state construction of bounded states in a quantum field theoretical context.
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