{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:NHVJN2LMNRY534FAE5OCQ7TNAK","short_pith_number":"pith:NHVJN2LM","schema_version":"1.0","canonical_sha256":"69ea96e96c6c71ddf0a0275c287e6d02be0d0854b84413fb81d17be725dbdadd","source":{"kind":"arxiv","id":"1304.2292","version":1},"attestation_state":"computed","paper":{"title":"Phantom Instability of Viscous Dark Energy in Anisotropic Space-Time","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Hassan Amirhashchi","submitted_at":"2013-04-01T00:41:17Z","abstract_excerpt":"Phantom dark energy is a proposal that explains the current observations that mildly favor the equation of state of dark energy $\\omega^{de}$ crossing -1 at 68% confidence level. However, phantom fields are generally ruled out by ultraviolet quantum instabilities. To overcome this discrepancy, in this paper we propose a mechanism to show that how the presence of bulk viscosity in the cosmic fluid can temporarily drive the fluid into the phantom region ($\\omega<-1$). As time is going on, phantom decays and ultimately $\\omega^{de}$ approaches to -1. Then we show these quintessence and phantom de"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1304.2292","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-04-01T00:41:17Z","cross_cats_sorted":[],"title_canon_sha256":"b0dca5dd90aafccf67b93f19628a9d2c1eba2dcd55447fe360f19d43848ef447","abstract_canon_sha256":"a54a8d5599f033cf3e2d635a690afed481c8b05e43f0cd7639206ebbf5f5d2f1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:28:43.510800Z","signature_b64":"4lLv7rljarX2XVMb9FGg4lLI86nF5kYKEtXi8zsUk7XyZtXGaMyJhOnVZ033sTd3ZhIs2iTNZVEietJUiSILAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"69ea96e96c6c71ddf0a0275c287e6d02be0d0854b84413fb81d17be725dbdadd","last_reissued_at":"2026-05-18T03:28:43.510129Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:28:43.510129Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Phantom Instability of Viscous Dark Energy in Anisotropic Space-Time","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Hassan Amirhashchi","submitted_at":"2013-04-01T00:41:17Z","abstract_excerpt":"Phantom dark energy is a proposal that explains the current observations that mildly favor the equation of state of dark energy $\\omega^{de}$ crossing -1 at 68% confidence level. However, phantom fields are generally ruled out by ultraviolet quantum instabilities. To overcome this discrepancy, in this paper we propose a mechanism to show that how the presence of bulk viscosity in the cosmic fluid can temporarily drive the fluid into the phantom region ($\\omega<-1$). As time is going on, phantom decays and ultimately $\\omega^{de}$ approaches to -1. Then we show these quintessence and phantom de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.2292","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1304.2292","created_at":"2026-05-18T03:28:43.510221+00:00"},{"alias_kind":"arxiv_version","alias_value":"1304.2292v1","created_at":"2026-05-18T03:28:43.510221+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.2292","created_at":"2026-05-18T03:28:43.510221+00:00"},{"alias_kind":"pith_short_12","alias_value":"NHVJN2LMNRY5","created_at":"2026-05-18T12:27:52.871228+00:00"},{"alias_kind":"pith_short_16","alias_value":"NHVJN2LMNRY534FA","created_at":"2026-05-18T12:27:52.871228+00:00"},{"alias_kind":"pith_short_8","alias_value":"NHVJN2LM","created_at":"2026-05-18T12:27:52.871228+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NHVJN2LMNRY534FAE5OCQ7TNAK","json":"https://pith.science/pith/NHVJN2LMNRY534FAE5OCQ7TNAK.json","graph_json":"https://pith.science/api/pith-number/NHVJN2LMNRY534FAE5OCQ7TNAK/graph.json","events_json":"https://pith.science/api/pith-number/NHVJN2LMNRY534FAE5OCQ7TNAK/events.json","paper":"https://pith.science/paper/NHVJN2LM"},"agent_actions":{"view_html":"https://pith.science/pith/NHVJN2LMNRY534FAE5OCQ7TNAK","download_json":"https://pith.science/pith/NHVJN2LMNRY534FAE5OCQ7TNAK.json","view_paper":"https://pith.science/paper/NHVJN2LM","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1304.2292&json=true","fetch_graph":"https://pith.science/api/pith-number/NHVJN2LMNRY534FAE5OCQ7TNAK/graph.json","fetch_events":"https://pith.science/api/pith-number/NHVJN2LMNRY534FAE5OCQ7TNAK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NHVJN2LMNRY534FAE5OCQ7TNAK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NHVJN2LMNRY534FAE5OCQ7TNAK/action/storage_attestation","attest_author":"https://pith.science/pith/NHVJN2LMNRY534FAE5OCQ7TNAK/action/author_attestation","sign_citation":"https://pith.science/pith/NHVJN2LMNRY534FAE5OCQ7TNAK/action/citation_signature","submit_replication":"https://pith.science/pith/NHVJN2LMNRY534FAE5OCQ7TNAK/action/replication_record"}},"created_at":"2026-05-18T03:28:43.510221+00:00","updated_at":"2026-05-18T03:28:43.510221+00:00"}