Padmanabhan, T.2012-03-032012-03-032009-09-12http://hdl.handle.net/11007/216The role of time coordinate in the realization of March's principles is highlighted. It is shown that Mach's principle is linked to the definition of a 'particle'. These results a deep connection between quantum gravity an Mach's principle.enMach's principleRindler coordinatesQuantum cosmologyQuantum gravityArticle