un 1 99 8 On Infravacua and the Localisation of Sectors
un 1 99 8 On Infravacua and the Localisation of Sectors
复制标题
un 1 99 8 关于 Infravacua 和部门本地化
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Walter Kunhardt
中科院分区：
文献类型：
--
作者：
Walter Kunhardt
研究了三维空间中自由无质量标量场的一类超选择扇区。研究表明，当在合适的“次真空”背景前观察时，这些不能相对于真空定位的部分获得了更好的定位，即在类空间锥体中。这些背景状态基本上与克劳斯、波利和瑞茨作为红外辐射云模型引入的一类状态相一致。
A certain class of superselection sectors of the free massless scalar field in 3 space dimensions is considered. It is shown that these sectors, which cannot be localised with respect to the vacuum, acquire a much better localisation, namely in spacelike cones, when viewed in front of suitable " infravacuum " backgrounds. These background states coincide , essentially, with a class of states introduced by Kraus, Polley and Reents as models for clouds of infrared radiation.