{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:IIH7TXSTI4X7NWILEWFCTO7JFQ","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":"b29a3e5fd1f28bdf1ee04008ff7ff1d586ff01178fc11dfc2080f4021b5b33e4","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2009-06-17T16:55:06Z","title_canon_sha256":"49a700be4db24f890017ee5cc344f4b3ce15114b744f1f7de07beee350ae5b2f"},"schema_version":"1.0","source":{"id":"0906.3242","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.3242","created_at":"2026-05-18T02:34:45Z"},{"alias_kind":"arxiv_version","alias_value":"0906.3242v2","created_at":"2026-05-18T02:34:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.3242","created_at":"2026-05-18T02:34:45Z"},{"alias_kind":"pith_short_12","alias_value":"IIH7TXSTI4X7","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"IIH7TXSTI4X7NWIL","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"IIH7TXST","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:d3d1ea25ff8c346a7582532940ce39f3b06053a9503db4242c149a65ee6bc322","target":"graph","created_at":"2026-05-18T02:34:45Z","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 describe string frame bouncing universe scenarios involving the creation and annihilation of a non-BPS D9-brane in type IIA superstring theory. We find several classes of solutions, in which the bounce is driven by the tachyon dynamics of the non-BPS brane. The metric and the dilaton are consistently described in terms of the lowest order effective action. The bounce solutions interpolate between contracting and expanding pre-big bang (or post-big bang) solutions. The singular behavior of our bounce solutions is the same as that of the pre-big bang (or post-big bang) solution. Upon adding a","authors_text":"Ivo Sachs, Jin U Kang, Nicolas Moeller, Philipp H\\\"offer v. Loewenfeld","cross_cats":["astro-ph.CO","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2009-06-17T16:55:06Z","title":"Bouncing universe and non-BPS branes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.3242","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:a43d48e8ea4b2c40d89ed725810f025794943c63d5b826dd3b039043d580476f","target":"record","created_at":"2026-05-18T02:34:45Z","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":"b29a3e5fd1f28bdf1ee04008ff7ff1d586ff01178fc11dfc2080f4021b5b33e4","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2009-06-17T16:55:06Z","title_canon_sha256":"49a700be4db24f890017ee5cc344f4b3ce15114b744f1f7de07beee350ae5b2f"},"schema_version":"1.0","source":{"id":"0906.3242","kind":"arxiv","version":2}},"canonical_sha256":"420ff9de53472ff6d90b258a29bbe92c14ec5ce7c23c6574767e9598f7c4d22a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"420ff9de53472ff6d90b258a29bbe92c14ec5ce7c23c6574767e9598f7c4d22a","first_computed_at":"2026-05-18T02:34:45.611214Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:34:45.611214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bcYw5r4a4gyEcWmSJzFwcalWz5MjpEf8PLarWyl5x3Tngy5yO8XafHqyKfcMwa0xxd2oYyS6HcsTgx8Ayz97CA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:34:45.611604Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.3242","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a43d48e8ea4b2c40d89ed725810f025794943c63d5b826dd3b039043d580476f","sha256:d3d1ea25ff8c346a7582532940ce39f3b06053a9503db4242c149a65ee6bc322"],"state_sha256":"daac369949c9c9e718a1c674626260a2e32f37e78db8755e184ca127faa0a106"}