Vacuum state in de Sitter spacetime with static charts

被引：12

作者：

Higuchi, Atsushi ^{[1
]}

Yamamoto, Kazuhiro ^{[2
]}

机构：

[1] Univ York, Dept Math, York YO10 5DD, N Yorkshire, England

[2] Hiroshima Univ, Grad Sch Sci, Dept Phys, Higashihiroshima 7398526, Japan

来源：

PHYSICAL REVIEW D | 2018年 / 98卷 / 06期

关键词：

QUANTUM-FIELD-THEORY; SCALAR FIELD; PARTICLE CREATION; BUBBLE NUCLEATION; TIME; QUANTIZATION; UNIVERSE;

D O I：

10.1103/PhysRevD.98.065014

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the free massive scalar field in de Sitter spacetime with static charts. In particular, we find positive-frequency modes for the Bunch-Davies vacuum state natural to the static charts as superpositions of the well-known positive-frequency modes in the conformally-flat chart. We discuss in detail how these modes are defined globally in the two static charts and the region in their future. The global structure of these solutions leads to the well-known description of the Bunch-Davies vacuum state as an entangled state. Our results are expected to be useful not only for studying the thermal properties in the vacuum fluctuations in de Sitter spacetime but also for understanding the nonlocal properties of the vacuum state.

引用

页数：12

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