{
  "annotation_id": "323c98f2-88cf-4526-a5b4-a5b0d57722bb",
  "date_created": "2026-02-17T05:53:20.533000Z",
  "date_modified": "2026-02-17T05:53:20.533000Z",
  "file_hash": "c0cec88c81e798362385ee228455c7c0819b545b783cde6c659ef692939a33e2",
  "private": false,
  "record": {
    "abstract": "We study the compactification of higher-dimensional Lovelock gravity on compact irreducible symmetric spaces, focusing on conditions under which a physically healthy four-dimensional Minkowski vacuum exists. We show that when the internal dimension is five or less, or when the theory is restricted to the Einstein-Gauss-Bonnet sector, the four-dimensional graviton (tensor sector) is necessarily a ghost. Inclusion of the cubic Lovelock term removes this ghost instability; however, the resulting Minkowski vacuum is generically only metastable, being accompanied by energetically favored Anti-de Sitter vacua. While such metastability cannot be avoided for spherical internal spaces, we identify an infinite class of higher-rank symmetric spaces where the true vacuum can be pushed to infinity in moduli space, thereby realizing genuinely stable and ghost-free Minkowski vacua at the level of the four-dimensional effective theory. To support these conclusions, we explicitly compute Lovelock terms up to cubic order on these spaces, confirming a universal log-convexity among the linear, quadratic, and cubic invariants, which plays a central role in our analysis.",
    "arxiv_id": "2601.09256",
    "authors": [
      "Keisuke Ohashi"
    ],
    "categories": [
      "hep-th",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "title": "Ghost-Free Stable Minkowski Vacua in Lovelock Compactifications on Irreducible Symmetric Spaces",
    "url": "https://arxiv.org/abs/2601.09256",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "161c6e07-a0d4-452b-8c1a-7e9968c7ad6d",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}