{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:Q4EVWFPIBLQAPG24G7IISIVCRV","short_pith_number":"pith:Q4EVWFPI","canonical_record":{"source":{"id":"1809.05386","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-09-14T13:05:43Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"9871d73888e95cb2ef2bb5a806efbd1fafd7402e0cc4b67d1bdffd62aeec0d64","abstract_canon_sha256":"150d6c472615280a02f4eefb5353c74fa42f6d2beb248ca6b5aa27e6b4fe8284"},"schema_version":"1.0"},"canonical_sha256":"87095b15e80ae0079b5c37d08922a28d6b97726eeab09cf89bff5063b26eb481","source":{"kind":"arxiv","id":"1809.05386","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.05386","created_at":"2026-05-17T23:41:46Z"},{"alias_kind":"arxiv_version","alias_value":"1809.05386v2","created_at":"2026-05-17T23:41:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.05386","created_at":"2026-05-17T23:41:46Z"},{"alias_kind":"pith_short_12","alias_value":"Q4EVWFPIBLQA","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"Q4EVWFPIBLQAPG24","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"Q4EVWFPI","created_at":"2026-05-18T12:32:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:Q4EVWFPIBLQAPG24G7IISIVCRV","target":"record","payload":{"canonical_record":{"source":{"id":"1809.05386","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-09-14T13:05:43Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"9871d73888e95cb2ef2bb5a806efbd1fafd7402e0cc4b67d1bdffd62aeec0d64","abstract_canon_sha256":"150d6c472615280a02f4eefb5353c74fa42f6d2beb248ca6b5aa27e6b4fe8284"},"schema_version":"1.0"},"canonical_sha256":"87095b15e80ae0079b5c37d08922a28d6b97726eeab09cf89bff5063b26eb481","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:46.006336Z","signature_b64":"jpMVO+HFtYv66nZPqhkmKFS3jonKItj4+/vXx9PN3LqWaMyQWLiuxqOUalSVN/5MLZV7B1+fojkjeUd2XOv+Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"87095b15e80ae0079b5c37d08922a28d6b97726eeab09cf89bff5063b26eb481","last_reissued_at":"2026-05-17T23:41:46.005769Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:46.005769Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.05386","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:41:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AHCDDhvtQ8oGGz+Sa0OnyNQ3eWKEeGNSkUHhXtaNYf4vt2QEE96rwPBIhBlO06Q2bBbIv7TZEdj8M1wCuNUSCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T17:57:42.673885Z"},"content_sha256":"8423609589730802c1480be693f7d691277bfedc4d70f973c47687950255ca27","schema_version":"1.0","event_id":"sha256:8423609589730802c1480be693f7d691277bfedc4d70f973c47687950255ca27"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:Q4EVWFPIBLQAPG24G7IISIVCRV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Analog Kerr Black hole and Penrose effect in a Bose-Einstein Condensate","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"cond-mat.quant-gas","authors_text":"C. Leblanc, D. D. Solnyshkov, G. Malpuech, O. Bleu, S. V. Koniakhin","submitted_at":"2018-09-14T13:05:43Z","abstract_excerpt":"Analog physics allows simulating inaccessible objects, such as black holes, in the lab. We propose to implement an acoustic Kerr black hole with quantized angular momentum in a polariton Bose-Einstein condensate. We show that the metric of the condensate is equivalent to the Kerr's one, exhibiting a horizon and an ergosphere. Using topological defects as test particles, we demonstrate an analog Penrose effect, extracting the rotation energy of the black hole. The particle trajectories are well described by the time-like geodesics of the Kerr metric, confirming the potential of analog gravity."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.05386","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:41:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H83hJjNUFpaznML59E0lZaf/Fdr4HDCFmIc20SsxJYm5/LatH29rPV5Pj0kV2y7XT0hzQENdWuQTQ6lCf3baBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T17:57:42.674232Z"},"content_sha256":"3ea54daa7d7744b6c2a64fefc49a196c06e2dcbd77b1194c80dd170cba544350","schema_version":"1.0","event_id":"sha256:3ea54daa7d7744b6c2a64fefc49a196c06e2dcbd77b1194c80dd170cba544350"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q4EVWFPIBLQAPG24G7IISIVCRV/bundle.json","state_url":"https://pith.science/pith/Q4EVWFPIBLQAPG24G7IISIVCRV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q4EVWFPIBLQAPG24G7IISIVCRV/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":"2026-06-02T17:57:42Z","links":{"resolver":"https://pith.science/pith/Q4EVWFPIBLQAPG24G7IISIVCRV","bundle":"https://pith.science/pith/Q4EVWFPIBLQAPG24G7IISIVCRV/bundle.json","state":"https://pith.science/pith/Q4EVWFPIBLQAPG24G7IISIVCRV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q4EVWFPIBLQAPG24G7IISIVCRV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:Q4EVWFPIBLQAPG24G7IISIVCRV","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":"150d6c472615280a02f4eefb5353c74fa42f6d2beb248ca6b5aa27e6b4fe8284","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-09-14T13:05:43Z","title_canon_sha256":"9871d73888e95cb2ef2bb5a806efbd1fafd7402e0cc4b67d1bdffd62aeec0d64"},"schema_version":"1.0","source":{"id":"1809.05386","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.05386","created_at":"2026-05-17T23:41:46Z"},{"alias_kind":"arxiv_version","alias_value":"1809.05386v2","created_at":"2026-05-17T23:41:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.05386","created_at":"2026-05-17T23:41:46Z"},{"alias_kind":"pith_short_12","alias_value":"Q4EVWFPIBLQA","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"Q4EVWFPIBLQAPG24","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"Q4EVWFPI","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:3ea54daa7d7744b6c2a64fefc49a196c06e2dcbd77b1194c80dd170cba544350","target":"graph","created_at":"2026-05-17T23:41:46Z","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":"Analog physics allows simulating inaccessible objects, such as black holes, in the lab. We propose to implement an acoustic Kerr black hole with quantized angular momentum in a polariton Bose-Einstein condensate. We show that the metric of the condensate is equivalent to the Kerr's one, exhibiting a horizon and an ergosphere. Using topological defects as test particles, we demonstrate an analog Penrose effect, extracting the rotation energy of the black hole. The particle trajectories are well described by the time-like geodesics of the Kerr metric, confirming the potential of analog gravity.","authors_text":"C. Leblanc, D. D. Solnyshkov, G. Malpuech, O. Bleu, S. V. Koniakhin","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-09-14T13:05:43Z","title":"Analog Kerr Black hole and Penrose effect in a Bose-Einstein Condensate"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.05386","kind":"arxiv","version":2},"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":"sha256:8423609589730802c1480be693f7d691277bfedc4d70f973c47687950255ca27","target":"record","created_at":"2026-05-17T23:41:46Z","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":"150d6c472615280a02f4eefb5353c74fa42f6d2beb248ca6b5aa27e6b4fe8284","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-09-14T13:05:43Z","title_canon_sha256":"9871d73888e95cb2ef2bb5a806efbd1fafd7402e0cc4b67d1bdffd62aeec0d64"},"schema_version":"1.0","source":{"id":"1809.05386","kind":"arxiv","version":2}},"canonical_sha256":"87095b15e80ae0079b5c37d08922a28d6b97726eeab09cf89bff5063b26eb481","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"87095b15e80ae0079b5c37d08922a28d6b97726eeab09cf89bff5063b26eb481","first_computed_at":"2026-05-17T23:41:46.005769Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:46.005769Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jpMVO+HFtYv66nZPqhkmKFS3jonKItj4+/vXx9PN3LqWaMyQWLiuxqOUalSVN/5MLZV7B1+fojkjeUd2XOv+Cg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:46.006336Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.05386","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8423609589730802c1480be693f7d691277bfedc4d70f973c47687950255ca27","sha256:3ea54daa7d7744b6c2a64fefc49a196c06e2dcbd77b1194c80dd170cba544350"],"state_sha256":"4ce4f8165a05d6f41d44174c6744cd01c6161dd83d9e62a6471ecef35d9aa45f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iIHTBEvxlxL3oz7W3t63dVLoitBp2Y2OV7qjvMlm2ERMSXJYRdugO3CGkDIwMFFDPCXlmfS+JwJXfGXYX18EDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T17:57:42.676239Z","bundle_sha256":"d0c84e66853ac054116786e019278fec2613a84c8c06d2ac8e7061b63a6e3809"}}