Can someone tell me a theory in which the lowest twist operators are not the stress tensor and its derivatives? My aim is to work out the lightcone OPE for the theory and derive bounds like the averaged null energy condition. (as worked out in https://arxiv.org/pdf/1610.05308.pdf)
Say , for example , we consider the problem of placing 2 balls in 2 bins . If we treat the balls as identical , we have 3 ways , if not , we have 4 ways . Please point out if I am making some mistake in my interpretation .
In the Boltzmann entropy formula , the number of microstates is calculated according to Maxwell-Boltzmann statistics , i.e. , W = n!/Πki! , Σki = n . Why cannot we use some other method , such as Bose-Einstein or Fermi-Dirac statistics ?
Sorry for the vague wording of my question . Thanks for all your suggestions though . A prof. in the high energy physics dept. of my university gave me the same advice that Orodruin did .
Which book among Bernard Schutz , Stephani and d'Inverno is the best for an introductory level approach to GR ? I have read some tensor analysis from d'Inverno and have not found its treatment rigorous enough .