{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CH23PBHZINJJKJ33IVOON5TYP4","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"f1d432e619d7b53e99eb252502a05bcc3341d4cfaad3be8f380cbde5048a9cca","cross_cats_sorted":["hep-ex","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-10-04T11:56:36Z","title_canon_sha256":"08e2487b21925a03879d40ba34fe669f40cca9487646abedcf950295b5bf149f"},"schema_version":"1.0","source":{"id":"1810.02159","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.02159","created_at":"2026-07-05T00:38:23Z"},{"alias_kind":"arxiv_version","alias_value":"1810.02159v1","created_at":"2026-07-05T00:38:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.02159","created_at":"2026-07-05T00:38:23Z"},{"alias_kind":"pith_short_12","alias_value":"CH23PBHZINJJ","created_at":"2026-07-05T00:38:23Z"},{"alias_kind":"pith_short_16","alias_value":"CH23PBHZINJJKJ33","created_at":"2026-07-05T00:38:23Z"},{"alias_kind":"pith_short_8","alias_value":"CH23PBHZ","created_at":"2026-07-05T00:38:23Z"}],"graph_snapshots":[{"event_id":"sha256:ca61a0c2758753a75c42e7a1d8210ba824d052722f9cd13278707339ec273f95","target":"graph","created_at":"2026-07-05T00:38:23Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1810.02159/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A central aspect of the cosmological constant problem is to understand why vacuum energy does not gravitate. In order to account for this observation, while allowing for nontrivial dynamics of the quantum vacuum, we motivate a novel background independent theory of gravity. The theory is an extension of unimodular gravity that is described in geometric terms by means of a conformal (light-cone) structure and differential forms of degree one and two. We show that the subset of the classical field equations describing the dynamics of matter degrees of freedom and the conformal structure of space","authors_text":"Ra\\'ul Carballo-Rubio, Stephon Alexander","cross_cats":["hep-ex","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-10-04T11:56:36Z","title":"Topological Features of the Quantum Vacuum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.02159","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:8e888df0bebd64c6f0602ee841716366166a16dab267acfcadea95dbfdd52ba0","target":"record","created_at":"2026-07-05T00:38:23Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"f1d432e619d7b53e99eb252502a05bcc3341d4cfaad3be8f380cbde5048a9cca","cross_cats_sorted":["hep-ex","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-10-04T11:56:36Z","title_canon_sha256":"08e2487b21925a03879d40ba34fe669f40cca9487646abedcf950295b5bf149f"},"schema_version":"1.0","source":{"id":"1810.02159","kind":"arxiv","version":1}},"canonical_sha256":"11f5b784f9435295277b455ce6f6787f030289234b6d2776b8d3b8b83050b18e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"11f5b784f9435295277b455ce6f6787f030289234b6d2776b8d3b8b83050b18e","first_computed_at":"2026-07-05T00:38:23.298981Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:38:23.298981Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jnsTk2lGk98JoD0RB6q6SrHjyRCfuXNl54353YGVdRfN7ocZmeLZaVzaR/ei75U49TLEcZrcp8qjkQPF5pRYCA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:38:23.299383Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.02159","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e888df0bebd64c6f0602ee841716366166a16dab267acfcadea95dbfdd52ba0","sha256:ca61a0c2758753a75c42e7a1d8210ba824d052722f9cd13278707339ec273f95"],"state_sha256":"0b0f8704512cdb7a7bd08fc9e3d2cc7d9fa5f25974df48fe736823b395125aa1"}