{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:CEGGPAJ66NUIHOPLHI6LXQZLP3","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":"c3ccc5999a0ec43c6438446e57b169311f90d8dade3a9629838c29afed538b16","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-01-01T08:19:22Z","title_canon_sha256":"3adc4769efa44795ff917b8d9c1cb839ada42bc57ad29296271d595d7d8d8c27"},"schema_version":"1.0","source":{"id":"1601.00057","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.00057","created_at":"2026-05-18T00:55:25Z"},{"alias_kind":"arxiv_version","alias_value":"1601.00057v3","created_at":"2026-05-18T00:55:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.00057","created_at":"2026-05-18T00:55:25Z"},{"alias_kind":"pith_short_12","alias_value":"CEGGPAJ66NUI","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"CEGGPAJ66NUIHOPL","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"CEGGPAJ6","created_at":"2026-05-18T12:30:09Z"}],"graph_snapshots":[{"event_id":"sha256:afa3b0c2828db8d2596c2985c42acb05067f1a6c79f5da549357e37852703d38","target":"graph","created_at":"2026-05-18T00:55:25Z","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"},"paper":{"abstract_excerpt":"We propose a toy model of Dark Energy in which the degrees of freedom currently dominating the energy density of the universe are described by a pseudo-scalar \"axion field\" linearly coupled to the Pontryagin density, $ \\text{tr}(F \\wedge F)$, i.e., the exterior derivative of the Chern-Simons form, of a gauge field. We assume that the axion has self-interactions corresponding to an exponential potential. We argue that a non-vanishing magnetic helicity of the gauge field leads to slow-rolling of the axion at field values far below the Planck scale. Our proposal suggests a \"Tracking Dark Energy S","authors_text":"Juerg Froehlich, Robert Brandenberger, Stephon Alexander","cross_cats":["astro-ph.CO","gr-qc","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-01-01T08:19:22Z","title":"Tracking Dark Energy from Axion-Gauge Field Couplings"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.00057","kind":"arxiv","version":3},"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:eb37a7b3ecfa7b62a14604db73daeeeb43d69803b20fa20bf33c42b9ee3fb2ea","target":"record","created_at":"2026-05-18T00:55:25Z","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":"c3ccc5999a0ec43c6438446e57b169311f90d8dade3a9629838c29afed538b16","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-01-01T08:19:22Z","title_canon_sha256":"3adc4769efa44795ff917b8d9c1cb839ada42bc57ad29296271d595d7d8d8c27"},"schema_version":"1.0","source":{"id":"1601.00057","kind":"arxiv","version":3}},"canonical_sha256":"110c67813ef36883b9eb3a3cbbc32b7ef0fd6bcaad376cdc6df8cfcca70926f4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"110c67813ef36883b9eb3a3cbbc32b7ef0fd6bcaad376cdc6df8cfcca70926f4","first_computed_at":"2026-05-18T00:55:25.368522Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:55:25.368522Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fOTpncbi+WTEZ/tbxbiSHkSOwos/YY/V8WIsxlgtZ8wVwTLLelqFCddc1YyZztYbxdRME2eeYix6eIEjqnceCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:55:25.369025Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.00057","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb37a7b3ecfa7b62a14604db73daeeeb43d69803b20fa20bf33c42b9ee3fb2ea","sha256:afa3b0c2828db8d2596c2985c42acb05067f1a6c79f5da549357e37852703d38"],"state_sha256":"b088ce43dc5f78b4d134f549c210ac258c3254d07da327d8f1e0c273a2e57bc7"}