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Testing Photons Coupled to Weyl Tensor with Gravitational Time Advancement
Li, Gang1,2; Deng, Xue-Mei1
2018-12-01
Source PublicationCOMMUNICATIONS IN THEORETICAL PHYSICS
ISSN0253-6102
Volume70Issue:6Pages:721-727
Abstract

Classical Solar System tests of photons coupled to Weyl tensor with two polarizations were studied in a recent work. A coupling strength parameter a in this model was firstly obtained as |alpha| less than or similar to 4 x 10(11) m(2) by using available datasets in the Solar System. In this paper, a new test called by gravitational time advancement is proposed and investigated to test such the coupling. This new test, which is quite different from Shapiro time delay, depends strongly on round-trip proper time span (not coordinate time one) of flight of radio pulses between an observer on the Earth and a distant spacecraft. For ranging a spacecraft getting far away from the Sun, two special cases (the superior/inferior conjunctions) are used to analyse the observability in the advancement contributed by the Weyl coupling. We found that the situation of the inferior conjunction is more suitable for detecting the advancement caused by such the Weyl coupling. In either case, two kinds of polarizations make the advancement in the model smaller or larger than the one of general relativity. Although the observability in the advancement could be out of the reach of already existing technology, the implement of planetary laser ranging and optical clocks might provide us more insights on such the Weyl coupling in the near future.

Keywordgravitation experimental tests of gravitational theories light propagation astrometry
DOI10.1088/0253-6102/70/6/721
WOS KeywordVACUUM POLARIZATION ; LIGHT PHOTONS ; VELOCITY ; FASTER ; FIELDS
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000455133400010
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/20479
Collection中国科学院紫金山天文台
Corresponding AuthorDeng, Xue-Mei
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210034, Jiangsu, Peoples R China
2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Li, Gang,Deng, Xue-Mei. Testing Photons Coupled to Weyl Tensor with Gravitational Time Advancement[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2018,70(6):721-727.
APA Li, Gang,&Deng, Xue-Mei.(2018).Testing Photons Coupled to Weyl Tensor with Gravitational Time Advancement.COMMUNICATIONS IN THEORETICAL PHYSICS,70(6),721-727.
MLA Li, Gang,et al."Testing Photons Coupled to Weyl Tensor with Gravitational Time Advancement".COMMUNICATIONS IN THEORETICAL PHYSICS 70.6(2018):721-727.
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