期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP07(2021)102
关键词
Gauge-gravity correspondence; Classical Theories of Gravity
This study performs a mode expansion for massive scalar fields using the unitary principal series representations of SO(1,3), aiming to develop a holographic approach to gravity in asymptotically flat spacetime. These mode expansions are also useful for studying holography in three-dimensional de Sitter spacetime.
The extended BMS algebra contains a conformal subgroup that acts on the celestial sphere as SO(1, 3). It is of interest to perform mode expansions of free fields in Minkowski spacetime that realize this symmetry in a simple way. In the present work we perform such a mode expansion for massive scalar fields using the unitary principal series representations of SO(1, 3) with a view to developing a holographic approach to gravity in asymptotically flat spacetime. These mode expansions are also of use in studying holography in three-dimensional de Sitter spacetime.
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