{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:VUCPQSN4J4UNKFQZPAGEWI7LKW","short_pith_number":"pith:VUCPQSN4","canonical_record":{"source":{"id":"2501.09177","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-01-15T22:12:26Z","cross_cats_sorted":["astro-ph.CO","hep-ph"],"title_canon_sha256":"60bb944bac75190b2ff60e3e8fc0c4005f53fef13971d5d0024be50871fcab03","abstract_canon_sha256":"2bb27237cec2fee01ee324469ea0c2256c6014bfcb7bd49ef75f53150c35a092"},"schema_version":"1.0"},"canonical_sha256":"ad04f849bc4f28d51619780c4b23eb559bda434ed74f267db3c6527113d87e85","source":{"kind":"arxiv","id":"2501.09177","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.09177","created_at":"2026-07-05T10:01:43Z"},{"alias_kind":"arxiv_version","alias_value":"2501.09177v1","created_at":"2026-07-05T10:01:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.09177","created_at":"2026-07-05T10:01:43Z"},{"alias_kind":"pith_short_12","alias_value":"VUCPQSN4J4UN","created_at":"2026-07-05T10:01:43Z"},{"alias_kind":"pith_short_16","alias_value":"VUCPQSN4J4UNKFQZ","created_at":"2026-07-05T10:01:43Z"},{"alias_kind":"pith_short_8","alias_value":"VUCPQSN4","created_at":"2026-07-05T10:01:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:VUCPQSN4J4UNKFQZPAGEWI7LKW","target":"record","payload":{"canonical_record":{"source":{"id":"2501.09177","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-01-15T22:12:26Z","cross_cats_sorted":["astro-ph.CO","hep-ph"],"title_canon_sha256":"60bb944bac75190b2ff60e3e8fc0c4005f53fef13971d5d0024be50871fcab03","abstract_canon_sha256":"2bb27237cec2fee01ee324469ea0c2256c6014bfcb7bd49ef75f53150c35a092"},"schema_version":"1.0"},"canonical_sha256":"ad04f849bc4f28d51619780c4b23eb559bda434ed74f267db3c6527113d87e85","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:01:43.116712Z","signature_b64":"HHIHXbq4zYRrVSmk5RaUTIVPBGQHAgFhx599FEcFv/2yvlvRwPCnpqDfiylpgOgl9+tQ1mKm+iHDpMdN9XLMDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad04f849bc4f28d51619780c4b23eb559bda434ed74f267db3c6527113d87e85","last_reissued_at":"2026-07-05T10:01:43.116230Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:01:43.116230Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.09177","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:01:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wB6YcE7uC8fnwFSzxFwR14QwH1fL6opGJTJOVUZrYDalwWTs/VkJn6sb20G+dsjW5Le8z1H5F95SebwzvXw9Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T20:41:13.158761Z"},"content_sha256":"bf54975fb1033787109ec748ccf59bee53cf15beaf56c8cc6513efd0c28a5f5b","schema_version":"1.0","event_id":"sha256:bf54975fb1033787109ec748ccf59bee53cf15beaf56c8cc6513efd0c28a5f5b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:VUCPQSN4J4UNKFQZPAGEWI7LKW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmological Interactions with Phantom Scalar Field: Revisiting Background Phase-Space Analysis with Compactified Variables","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-ph"],"primary_cat":"gr-qc","authors_text":"Amlan Halder, Andronikos Paliathanasis, Daya Shankar, Genly Leon","submitted_at":"2025-01-15T22:12:26Z","abstract_excerpt":"Energy transfer in the dark sector of the universe gives rise to new phenomena of special interest in modern cosmology. When dark energy is modeled as a phantom scalar field, interactions become crucial to avoid Big Rip singularities. In this work, we revisit the phase-space analysis of the field equations by introducing a new set of dimensionless variables distinct from the traditional Hubble normalization approach. These new variables define a compactified phase space for the evolution of physical parameters. We demonstrate that these compactified variables offer fresh insights into the phas"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.09177","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2501.09177/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:01:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W4bZIAoeD7bnatTptl/tEkbdAvNnIocp+KIOzj3U0Imd5wxHT1AygXKizxNOW2rfeJHEHv7OtSZDXmJ8dpMGCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T20:41:13.159337Z"},"content_sha256":"1068ee81c00148b5dfd65b59b2b9a53adf7b027444357760c1e13b3a8a738d24","schema_version":"1.0","event_id":"sha256:1068ee81c00148b5dfd65b59b2b9a53adf7b027444357760c1e13b3a8a738d24"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VUCPQSN4J4UNKFQZPAGEWI7LKW/bundle.json","state_url":"https://pith.science/pith/VUCPQSN4J4UNKFQZPAGEWI7LKW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VUCPQSN4J4UNKFQZPAGEWI7LKW/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-11T20:41:13Z","links":{"resolver":"https://pith.science/pith/VUCPQSN4J4UNKFQZPAGEWI7LKW","bundle":"https://pith.science/pith/VUCPQSN4J4UNKFQZPAGEWI7LKW/bundle.json","state":"https://pith.science/pith/VUCPQSN4J4UNKFQZPAGEWI7LKW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VUCPQSN4J4UNKFQZPAGEWI7LKW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:VUCPQSN4J4UNKFQZPAGEWI7LKW","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":"2bb27237cec2fee01ee324469ea0c2256c6014bfcb7bd49ef75f53150c35a092","cross_cats_sorted":["astro-ph.CO","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-01-15T22:12:26Z","title_canon_sha256":"60bb944bac75190b2ff60e3e8fc0c4005f53fef13971d5d0024be50871fcab03"},"schema_version":"1.0","source":{"id":"2501.09177","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.09177","created_at":"2026-07-05T10:01:43Z"},{"alias_kind":"arxiv_version","alias_value":"2501.09177v1","created_at":"2026-07-05T10:01:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.09177","created_at":"2026-07-05T10:01:43Z"},{"alias_kind":"pith_short_12","alias_value":"VUCPQSN4J4UN","created_at":"2026-07-05T10:01:43Z"},{"alias_kind":"pith_short_16","alias_value":"VUCPQSN4J4UNKFQZ","created_at":"2026-07-05T10:01:43Z"},{"alias_kind":"pith_short_8","alias_value":"VUCPQSN4","created_at":"2026-07-05T10:01:43Z"}],"graph_snapshots":[{"event_id":"sha256:1068ee81c00148b5dfd65b59b2b9a53adf7b027444357760c1e13b3a8a738d24","target":"graph","created_at":"2026-07-05T10:01:43Z","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/2501.09177/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Energy transfer in the dark sector of the universe gives rise to new phenomena of special interest in modern cosmology. When dark energy is modeled as a phantom scalar field, interactions become crucial to avoid Big Rip singularities. In this work, we revisit the phase-space analysis of the field equations by introducing a new set of dimensionless variables distinct from the traditional Hubble normalization approach. These new variables define a compactified phase space for the evolution of physical parameters. We demonstrate that these compactified variables offer fresh insights into the phas","authors_text":"Amlan Halder, Andronikos Paliathanasis, Daya Shankar, Genly Leon","cross_cats":["astro-ph.CO","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-01-15T22:12:26Z","title":"Cosmological Interactions with Phantom Scalar Field: Revisiting Background Phase-Space Analysis with Compactified Variables"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.09177","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:bf54975fb1033787109ec748ccf59bee53cf15beaf56c8cc6513efd0c28a5f5b","target":"record","created_at":"2026-07-05T10:01:43Z","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":"2bb27237cec2fee01ee324469ea0c2256c6014bfcb7bd49ef75f53150c35a092","cross_cats_sorted":["astro-ph.CO","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-01-15T22:12:26Z","title_canon_sha256":"60bb944bac75190b2ff60e3e8fc0c4005f53fef13971d5d0024be50871fcab03"},"schema_version":"1.0","source":{"id":"2501.09177","kind":"arxiv","version":1}},"canonical_sha256":"ad04f849bc4f28d51619780c4b23eb559bda434ed74f267db3c6527113d87e85","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad04f849bc4f28d51619780c4b23eb559bda434ed74f267db3c6527113d87e85","first_computed_at":"2026-07-05T10:01:43.116230Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:01:43.116230Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HHIHXbq4zYRrVSmk5RaUTIVPBGQHAgFhx599FEcFv/2yvlvRwPCnpqDfiylpgOgl9+tQ1mKm+iHDpMdN9XLMDA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:01:43.116712Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.09177","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf54975fb1033787109ec748ccf59bee53cf15beaf56c8cc6513efd0c28a5f5b","sha256:1068ee81c00148b5dfd65b59b2b9a53adf7b027444357760c1e13b3a8a738d24"],"state_sha256":"98d5b8827689c161769b26a8c809002f9b2f2a06fc3caf9aead134ea1967ed57"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D84M7z0+PH+v46B2dPlTZnRjVlvl/nQcWg72jToeB5AHTojWmEoxlEB3cKuSh9tC7zfhNoz59xJ00uPBKOMBAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T20:41:13.165337Z","bundle_sha256":"a1212e4d941b95f5e7f1cbefb3801ac4d0d0350e1ab7337a70f72ebd316da07b"}}