德西特的一个离散的但却非凡的砖块：“无质量的最小耦合场”
A discrete nonetheless remarkable brick in de Sitter: the "massless minimally coupled field"
摘要：
在过去的十年里，对德西特时空物理学的兴趣一直在快速增长。除了暴胀理论中假设存在的“德西特周期”，宇宙加速膨胀的观测证据（解释为正的宇宙学常数或“暗能量“或某种形式的“精华”）引发了物理学界的大量关注。一种特殊的德西特场称为“无质量最小耦合场”（mmc），它在暴胀模型和德西特引力场的构造中起着重要的作用。在[1]中提出了一种mmc场的协变量子化方法，即Krein-Gupta-Bleetman量子化。在这次演讲中，我们将回顾这种结构，并解释这种场在德西特时空中无质量自旋2场的结构中的相关性。
英文摘要：
Over the last ten years interest in the physics of de Sitter spacetime has been growing very fast. Besides the supposed existence of a "de sitterian period" in inflation theories, the observational evidence of an acceleration of the universe expansion (interpreted as a positive cosmological constant or a "dark energy" or some form of "quintessence") has triggered a lot of attention in the physics community. A specific de sitterian field called "massless minimally coupled field" (mmc) plays a fundamental role in inflation models and in the construction of the de sitterian gravitational field. A covariant quantization of the mmc field, `a la Krein-Gupta-Bleuler was proposed in [1]. In this talk, we will review this construction and explain the relevance of such a field in the construction of a massless spin 2 field in de Sitter space-time.
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