Some not-so-common ideas about gravity

[摘要] Most of the approaches to the construction of a theory of quantum gravity share some principles which do not have specific experimental support up to date. Two of these principles are relevant for our discussion: (i) the gravitational field should have a quantum description in certain regime, and (ii) any theory of gravity containing general relativity should be relational. We study in general terms the possible implications of assuming deviations from these principles, their compatibility with current experimental knowledge, and how can they affect future experiments.

[发布机构] Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía, Granada; 18008, Spain^1;Departamento de Física Teórica II, Universidad Complutense de Madrid, Madrid; 28040, Spain^2;Instituto de Estructura de la Materia (IEM-CSIC), Serrano 121, Madrid; 28006, Spain^3

[效力级别] 力学 [学科分类] 力学，机械学

[关键词] Experimental knowledge;General Relativity;Gravitational fields;Quantum description;Quantum gravity;Theory of gravity