{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:L2ZTTWF6GWWTXTYJ72RINC6Y33","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":"ef0d94cc9b99349ad09c716ff94488bb55f3b82063d7d529de7fc76cf863966f","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2021-11-02T17:40:21Z","title_canon_sha256":"ad6b0f324215777b7ca80920ef3ec8dbf6d23f15fb2055b6185abfd31d0bd293"},"schema_version":"1.0","source":{"id":"2111.01765","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.01765","created_at":"2026-07-05T04:20:30Z"},{"alias_kind":"arxiv_version","alias_value":"2111.01765v2","created_at":"2026-07-05T04:20:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.01765","created_at":"2026-07-05T04:20:30Z"},{"alias_kind":"pith_short_12","alias_value":"L2ZTTWF6GWWT","created_at":"2026-07-05T04:20:30Z"},{"alias_kind":"pith_short_16","alias_value":"L2ZTTWF6GWWTXTYJ","created_at":"2026-07-05T04:20:30Z"},{"alias_kind":"pith_short_8","alias_value":"L2ZTTWF6","created_at":"2026-07-05T04:20:30Z"}],"graph_snapshots":[{"event_id":"sha256:cd5382ab4830bb27f577d0802b9b4002a4287d5afa31b6e10bb378c97d510a09","target":"graph","created_at":"2026-07-05T04:20:30Z","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/2111.01765/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We examine the dynamics of FLRW cosmologies in which the vacuum interacts with a perfect fluid through an energy exchange, focusing on the exploration of nonsingular configurations, including cyclic and bouncing models. We consider two specific choices for the energy transfer. In the first case, the energy transfer is proportional to a linear combination of the vacuum and fluid energy densities which makes the conservation equations exactly integrable. The resulting Friedmann equation can be interpreted as an energy constraint equation with an effective potential for the scale factor that may ","authors_text":"David Wands, Marco Bruni, Rodrigo Maier","cross_cats":["astro-ph.CO","hep-th"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2021-11-02T17:40:21Z","title":"Nonsingular Cosmology from an Interacting Vacuum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.01765","kind":"arxiv","version":2},"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:b7b6a0882d195cc55300b41610dcb3cf2713bb0f8376c8d2d7e25c3fe260d5f5","target":"record","created_at":"2026-07-05T04:20:30Z","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":"ef0d94cc9b99349ad09c716ff94488bb55f3b82063d7d529de7fc76cf863966f","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2021-11-02T17:40:21Z","title_canon_sha256":"ad6b0f324215777b7ca80920ef3ec8dbf6d23f15fb2055b6185abfd31d0bd293"},"schema_version":"1.0","source":{"id":"2111.01765","kind":"arxiv","version":2}},"canonical_sha256":"5eb339d8be35ad3bcf09fea2868bd8dec0b9f0164cfe42b7b7f82df9047c6714","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5eb339d8be35ad3bcf09fea2868bd8dec0b9f0164cfe42b7b7f82df9047c6714","first_computed_at":"2026-07-05T04:20:30.835338Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:20:30.835338Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H8nJzW5uUKHEGaMlzciK1KncoCwNOmy4Qr5HfL7ofw4DYBlrQINQHnBKqaAs5ZTuHfY8foh3ZQbuqprVud1DCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:20:30.835839Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.01765","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7b6a0882d195cc55300b41610dcb3cf2713bb0f8376c8d2d7e25c3fe260d5f5","sha256:cd5382ab4830bb27f577d0802b9b4002a4287d5afa31b6e10bb378c97d510a09"],"state_sha256":"bcbe73e358aa56502f9c0b103c97bb843b91e7c8b4b9bdade0a95439d62b0dff"}