{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:ZKKQPXAQRB6FIYTESIGKKWWB6S","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":"2a8ecae1416959218b647ea210afb0dd480b96e32d4ff88acc6cbb60b384e418","cross_cats_sorted":["hep-ph","physics.optics","physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2011-07-06T20:00:15Z","title_canon_sha256":"e838d7b7dc42c034c118ece1118da335e5cf9ac211d103a154fb093c677f0641"},"schema_version":"1.0","source":{"id":"1107.1240","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.1240","created_at":"2026-05-18T02:01:22Z"},{"alias_kind":"arxiv_version","alias_value":"1107.1240v1","created_at":"2026-05-18T02:01:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.1240","created_at":"2026-05-18T02:01:22Z"},{"alias_kind":"pith_short_12","alias_value":"ZKKQPXAQRB6F","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"ZKKQPXAQRB6FIYTE","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"ZKKQPXAQ","created_at":"2026-05-18T12:26:47Z"}],"graph_snapshots":[{"event_id":"sha256:e37feb610781bdc592d051ff4b5f8ea689ff346eb3e84879bc6ffc600ba6e6be","target":"graph","created_at":"2026-05-18T02:01:22Z","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 discuss the presence of exotic electromagnetic phenomena in systems with finite charge density which are described by hydrodynamics. We show that such systems generically have negative refractive index for low frequency electromagnetic waves, i.e. the energy flux and the phase velocity of the wave propagate in opposite directions. We comment on possible phenomenological applications, focusing on the Quark Gluon Plasma.","authors_text":"Alberto Mariotti, Antonio Amariti, Davide Forcella","cross_cats":["hep-ph","physics.optics","physics.plasm-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2011-07-06T20:00:15Z","title":"Negative Refractive Index in Hydrodynamical Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.1240","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":"sha256:48772af1810e388270d5f17d1a10083a81698c1bd539c8957bce906803c81a94","target":"record","created_at":"2026-05-18T02:01:22Z","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":"2a8ecae1416959218b647ea210afb0dd480b96e32d4ff88acc6cbb60b384e418","cross_cats_sorted":["hep-ph","physics.optics","physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2011-07-06T20:00:15Z","title_canon_sha256":"e838d7b7dc42c034c118ece1118da335e5cf9ac211d103a154fb093c677f0641"},"schema_version":"1.0","source":{"id":"1107.1240","kind":"arxiv","version":1}},"canonical_sha256":"ca9507dc10887c546264920ca55ac1f4b7ae82c8a5c039988ee1d1b663951c60","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ca9507dc10887c546264920ca55ac1f4b7ae82c8a5c039988ee1d1b663951c60","first_computed_at":"2026-05-18T02:01:22.246404Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:22.246404Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RR7IM93REiAnt2vybcD+7nloJz1fbeynx4ZZb6N1Zf29B8KRgBfPP0HcF/VFfgGE+jr/ZNNCCLNMTfpfMZ26AA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:22.247176Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.1240","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48772af1810e388270d5f17d1a10083a81698c1bd539c8957bce906803c81a94","sha256:e37feb610781bdc592d051ff4b5f8ea689ff346eb3e84879bc6ffc600ba6e6be"],"state_sha256":"bc897d4f8955e3d40e18ac0e36447aae3aa9b8d51500d0a65bca1462a0bdba90"}