{
  "id": "1211.5722",
  "version": "v1",
  "published": "2012-11-25T03:18:36.000Z",
  "updated": "2012-11-25T03:18:36.000Z",
  "title": "Modified entropic gravity revisited",
  "authors": [
    "Tower Wang"
  ],
  "comment": "12 pages",
  "categories": [
    "hep-th",
    "gr-qc"
  ],
  "abstract": "Inspired by Verlinde's idea, some modified versions of entropic gravity have appeared in the literature. Extending them in a unified formalism, we derive the generalized gravitational equations accordingly. From gravitational equations, the energy-momentum conservation law and cosmological equations are investigated. The covariant conservation law of energy-momentum tensor severely constrains viable modifications of entropic gravity. A discrepancy arises when two independent methods are applied to the homogeneous isotropic universe, posing a serious challenge to modified models of entropic gravity.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-11-25T03:18:36.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "04.20.-q",
      "98.80.Jk",
      "04.20.Cv"
    ],
    "keywords": [
      "modified entropic gravity",
      "gravitational equations",
      "covariant conservation law",
      "energy-momentum tensor severely constrains",
      "tensor severely constrains viable modifications"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1007/s11433-014-5545-7"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1203824,
      "adsabs": "2012arXiv1211.5722W"
    }
  }
}