{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:TGUM5FSQ774ESMMYKINCX7N2VC","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":"58ce534fff064361da8150189da0c2b917c8e34be64763de10c80bb506f36347","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2011-03-08T10:35:36Z","title_canon_sha256":"c84dae66d9575a600c0e13219349a1592b3eb10289b446b671d842749f6a1bcd"},"schema_version":"1.0","source":{"id":"1103.1488","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.1488","created_at":"2026-05-18T02:02:56Z"},{"alias_kind":"arxiv_version","alias_value":"1103.1488v1","created_at":"2026-05-18T02:02:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.1488","created_at":"2026-05-18T02:02:56Z"},{"alias_kind":"pith_short_12","alias_value":"TGUM5FSQ774E","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"TGUM5FSQ774ESMMY","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"TGUM5FSQ","created_at":"2026-05-18T12:26:42Z"}],"graph_snapshots":[{"event_id":"sha256:5e66796a08bb2c7a8c6d627eeda9fbe403ac6ae4069a1f40be4dcf2a1c13d4c8","target":"graph","created_at":"2026-05-18T02:02:56Z","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":"Using angle-resolved heterodyne four-wave-mixing technique, we probe the low momentum excitation spectrum of a coherent polariton gas. The experimental results are well captured by the Bogoliubov transformation which describes the transition from single particle excitations of a normal fluid to sound-wave-like excitations of a superfluid. In a dense coherent polariton gas, we find all the characteristics of a Bogoliubov transformation, i.e. the positive and negative energy branch with respect to the polariton gas energy at rest, sound-wave-like shapes for the excitations dispersion, intensity ","authors_text":"Benoit Deveaud-Pl\\'edran, Marcia T. Portella-Oberli, Maxime Richard, Michiel Wouters, Verena Kohnle, Yoan L\\'eger","cross_cats":["cond-mat.quant-gas"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2011-03-08T10:35:36Z","title":"From single particle to superfuid excitations in a dissipative polariton gas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.1488","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":"sha256:131ae0cd23e86688d672534118b82e334484eec9e8007f074ae2cd9633c1a2f1","target":"record","created_at":"2026-05-18T02:02:56Z","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":"58ce534fff064361da8150189da0c2b917c8e34be64763de10c80bb506f36347","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2011-03-08T10:35:36Z","title_canon_sha256":"c84dae66d9575a600c0e13219349a1592b3eb10289b446b671d842749f6a1bcd"},"schema_version":"1.0","source":{"id":"1103.1488","kind":"arxiv","version":1}},"canonical_sha256":"99a8ce9650fff8493198521a2bfdbaa88aa89dcf9b4fd9a4d2bba0ffc92585a3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99a8ce9650fff8493198521a2bfdbaa88aa89dcf9b4fd9a4d2bba0ffc92585a3","first_computed_at":"2026-05-18T02:02:56.500413Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:56.500413Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VhqX5rGpNrwvqKe90iGOlbrXOY4P++CNv0+Be6k19WADQLUva87d9aSBB7K4eFjBklLMTlTLftHxgYDNSpRfAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:56.501009Z","signed_message":"canonical_sha256_bytes"},"source_id":"1103.1488","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:131ae0cd23e86688d672534118b82e334484eec9e8007f074ae2cd9633c1a2f1","sha256:5e66796a08bb2c7a8c6d627eeda9fbe403ac6ae4069a1f40be4dcf2a1c13d4c8"],"state_sha256":"f9aefb52a62b1033421065e71f093f7cd87870d1da03a9c839bafa5ff4bcf740"}