{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:AEKUQKYO4SAW2DH54PMKTBDGZ5","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":"4d56aebedca0dc06ec9495b46c5afdba898612619c9cde37ded77282d9bdf149","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-01-19T15:04:42Z","title_canon_sha256":"4044a4c192f7d8e9877a3d4f81f58ee807e369c496f829599d012564c2a39767"},"schema_version":"1.0","source":{"id":"1901.06538","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.06538","created_at":"2026-07-05T00:12:24Z"},{"alias_kind":"arxiv_version","alias_value":"1901.06538v3","created_at":"2026-07-05T00:12:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.06538","created_at":"2026-07-05T00:12:24Z"},{"alias_kind":"pith_short_12","alias_value":"AEKUQKYO4SAW","created_at":"2026-07-05T00:12:24Z"},{"alias_kind":"pith_short_16","alias_value":"AEKUQKYO4SAW2DH5","created_at":"2026-07-05T00:12:24Z"},{"alias_kind":"pith_short_8","alias_value":"AEKUQKYO","created_at":"2026-07-05T00:12:24Z"}],"graph_snapshots":[{"event_id":"sha256:e8a5f24db09a0c77d0d8241da0674e3dd4135ad65c83361e4cdf4ed8b5583d26","target":"graph","created_at":"2026-07-05T00:12:24Z","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/1901.06538/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Primordial Gravitational waves leave polarization imprints on the Cosmic Microwave Background (CMB). In this article, we investigate polarization bispectrum, which is also referred to as the B-mode auto bispectrum, due to a matter bounce Universe. For simplicity, we consider a minimally coupled Einstein frame and obtain an analytical integral expression for the bispectrum and numerically perform the integration. We find that the signal-to-noise ratio is small, when compared with the same in the inflationary paradigm and hence quite difficult to detect in the future experiments. Thus a detectio","authors_text":"Debottam Nandi, Rahul Kothari","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-01-19T15:04:42Z","title":"B-Mode auto-bispectrum due to matter bounce"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.06538","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:a0d8bec0c9a9fbabd24054d00b33f79a61b0dc6a9c30b92aa13d18f37d11acca","target":"record","created_at":"2026-07-05T00:12:24Z","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":"4d56aebedca0dc06ec9495b46c5afdba898612619c9cde37ded77282d9bdf149","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-01-19T15:04:42Z","title_canon_sha256":"4044a4c192f7d8e9877a3d4f81f58ee807e369c496f829599d012564c2a39767"},"schema_version":"1.0","source":{"id":"1901.06538","kind":"arxiv","version":3}},"canonical_sha256":"0115482b0ee4816d0cfde3d8a98466cf6ec2a3cc7e865610e62df927c0bdcd43","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0115482b0ee4816d0cfde3d8a98466cf6ec2a3cc7e865610e62df927c0bdcd43","first_computed_at":"2026-07-05T00:12:24.263561Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:12:24.263561Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"B4m1fFt8FAMxFPbwztw2BGLe1eBQfxKxtX7/GePlaGIzZbKCkWsmH2a1x1lBqODaoqOjCi6V2JtAY5qlj1pHCw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:12:24.264052Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.06538","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a0d8bec0c9a9fbabd24054d00b33f79a61b0dc6a9c30b92aa13d18f37d11acca","sha256:e8a5f24db09a0c77d0d8241da0674e3dd4135ad65c83361e4cdf4ed8b5583d26"],"state_sha256":"db5128739bbc8eb5dd7ff26c285516ebeb204e6327fabef04c78f1f7a5a91814"}