"Conserved charges" of the Bondi-Metzner-Sachs algebra in the Brans-Dicke theory

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: PARTICLES AND FIELDS
• 页码范围: 377-393
• 页数: 17页
• 语种: 英文
• DOI: 10.1088/1674-1137/abd087

摘要

The asymptotic symmetries in the Brans-Dicke theory are analyzed using Penrose's conformal comple-tion method,which is independent of the coordinate system used.These symmetries,indeed,include supertransla-tions and Lorentz transformations for an asymptotically flat spacetime.With the Wald-Zoupas formalism,"con-served charges"and fluxes of the Bondi-Metzner-Sachs algebra are computed.The scalar degree of freedom contrib-utes only to the Lorentz boost charge,even though it plays a role in various fluxes.The flux-balance laws are further applied to constrain the displacement memory,spin memory,and center-of-mass memory effects.