{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:XMYA3Z76GNIY56L3SR5AM5J76E","short_pith_number":"pith:XMYA3Z76","canonical_record":{"source":{"id":"1902.02747","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-02-07T17:43:13Z","cross_cats_sorted":["cond-mat.quant-gas"],"title_canon_sha256":"c1aa3bea73aa9e16c5e69003da734b57a21361cfee5c452899e6cebc8de6d271","abstract_canon_sha256":"1f05d3b4e7462c30cdafcde2610a474909b49ec592291c23a96ddfb98a7526c4"},"schema_version":"1.0"},"canonical_sha256":"bb300de7fe33518ef97b947a06753ff11cc8f7cc6958d6a6789ca9bb83a16903","source":{"kind":"arxiv","id":"1902.02747","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.02747","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"arxiv_version","alias_value":"1902.02747v2","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.02747","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"pith_short_12","alias_value":"XMYA3Z76GNIY","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"XMYA3Z76GNIY56L3","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"XMYA3Z76","created_at":"2026-05-18T12:33:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:XMYA3Z76GNIY56L3SR5AM5J76E","target":"record","payload":{"canonical_record":{"source":{"id":"1902.02747","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-02-07T17:43:13Z","cross_cats_sorted":["cond-mat.quant-gas"],"title_canon_sha256":"c1aa3bea73aa9e16c5e69003da734b57a21361cfee5c452899e6cebc8de6d271","abstract_canon_sha256":"1f05d3b4e7462c30cdafcde2610a474909b49ec592291c23a96ddfb98a7526c4"},"schema_version":"1.0"},"canonical_sha256":"bb300de7fe33518ef97b947a06753ff11cc8f7cc6958d6a6789ca9bb83a16903","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:58.174065Z","signature_b64":"WakNgFKXPR3nQAnc4VsMMZupjdifpPoybWCPXlZboVhZqJgF/C//EomtTFSeCNGLzT7GQB7RQfRjKX2PwSXkAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bb300de7fe33518ef97b947a06753ff11cc8f7cc6958d6a6789ca9bb83a16903","last_reissued_at":"2026-05-17T23:47:58.173591Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:58.173591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.02747","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":"2026-05-17T23:47:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4i4QL/IEpHWtmt4Ojz1Jwc0Ygpq0vlrkdhBska4HYpX0PfdBPWIuSn6fQiA8LojxLoAxNMXt8Y8kN6fPQXnYAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T02:46:00.950813Z"},"content_sha256":"5c8c68d3be45ea658c350b26ea12d1186f9b0c7e35a8b89d39d1319202696a19","schema_version":"1.0","event_id":"sha256:5c8c68d3be45ea658c350b26ea12d1186f9b0c7e35a8b89d39d1319202696a19"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:XMYA3Z76GNIY56L3SR5AM5J76E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Vorticity and quantum turbulence in the merging of superfluid Helium nanodroplets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.quant-gas"],"primary_cat":"cond-mat.mes-hall","authors_text":"Francesco Ancilotto, Jos\\'e Mar\\'ia Escart\\'in, Manuel Barranco, Mart\\'i Pi","submitted_at":"2019-02-07T17:43:13Z","abstract_excerpt":"We have studied the merging of two $^4$He droplets at zero temperature, caused by their Van der Waals mutual attraction. During the early stages of the merging, density structures appear which closely match the experimental observations by Vicente et al. [J. Low Temp. Phys. 121, 627 (2000)]. When the droplets are merging, quantized vortex-antivortex ring pairs nucleate at the surface and annihilate inside the merged droplet producing a roton burst. We also observe the nucleation of quantized vortex-antivortex rings that wrap the droplet surface and remain localized on the surface until they ev"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.02747","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":"2026-05-17T23:47:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9D0jbrMPqjG4fImdw2oLWTkyA0uhXeVoEFsd90TOzOEPqxMYxI2ni7d4Jpqmd6YJ8d9+Q2QuPppaF6TLgmhpAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T02:46:00.951158Z"},"content_sha256":"d2eadd33b1d56506eef4c87c8f925cbea85925f1c29806e2fffdc5d809b72439","schema_version":"1.0","event_id":"sha256:d2eadd33b1d56506eef4c87c8f925cbea85925f1c29806e2fffdc5d809b72439"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XMYA3Z76GNIY56L3SR5AM5J76E/bundle.json","state_url":"https://pith.science/pith/XMYA3Z76GNIY56L3SR5AM5J76E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XMYA3Z76GNIY56L3SR5AM5J76E/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":"2026-05-28T02:46:00Z","links":{"resolver":"https://pith.science/pith/XMYA3Z76GNIY56L3SR5AM5J76E","bundle":"https://pith.science/pith/XMYA3Z76GNIY56L3SR5AM5J76E/bundle.json","state":"https://pith.science/pith/XMYA3Z76GNIY56L3SR5AM5J76E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XMYA3Z76GNIY56L3SR5AM5J76E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XMYA3Z76GNIY56L3SR5AM5J76E","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":"1f05d3b4e7462c30cdafcde2610a474909b49ec592291c23a96ddfb98a7526c4","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-02-07T17:43:13Z","title_canon_sha256":"c1aa3bea73aa9e16c5e69003da734b57a21361cfee5c452899e6cebc8de6d271"},"schema_version":"1.0","source":{"id":"1902.02747","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.02747","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"arxiv_version","alias_value":"1902.02747v2","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.02747","created_at":"2026-05-17T23:47:58Z"},{"alias_kind":"pith_short_12","alias_value":"XMYA3Z76GNIY","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"XMYA3Z76GNIY56L3","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"XMYA3Z76","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:d2eadd33b1d56506eef4c87c8f925cbea85925f1c29806e2fffdc5d809b72439","target":"graph","created_at":"2026-05-17T23:47:58Z","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 have studied the merging of two $^4$He droplets at zero temperature, caused by their Van der Waals mutual attraction. During the early stages of the merging, density structures appear which closely match the experimental observations by Vicente et al. [J. Low Temp. Phys. 121, 627 (2000)]. When the droplets are merging, quantized vortex-antivortex ring pairs nucleate at the surface and annihilate inside the merged droplet producing a roton burst. We also observe the nucleation of quantized vortex-antivortex rings that wrap the droplet surface and remain localized on the surface until they ev","authors_text":"Francesco Ancilotto, Jos\\'e Mar\\'ia Escart\\'in, Manuel Barranco, Mart\\'i Pi","cross_cats":["cond-mat.quant-gas"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-02-07T17:43:13Z","title":"Vorticity and quantum turbulence in the merging of superfluid Helium nanodroplets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.02747","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":"sha256:5c8c68d3be45ea658c350b26ea12d1186f9b0c7e35a8b89d39d1319202696a19","target":"record","created_at":"2026-05-17T23:47:58Z","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":"1f05d3b4e7462c30cdafcde2610a474909b49ec592291c23a96ddfb98a7526c4","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-02-07T17:43:13Z","title_canon_sha256":"c1aa3bea73aa9e16c5e69003da734b57a21361cfee5c452899e6cebc8de6d271"},"schema_version":"1.0","source":{"id":"1902.02747","kind":"arxiv","version":2}},"canonical_sha256":"bb300de7fe33518ef97b947a06753ff11cc8f7cc6958d6a6789ca9bb83a16903","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bb300de7fe33518ef97b947a06753ff11cc8f7cc6958d6a6789ca9bb83a16903","first_computed_at":"2026-05-17T23:47:58.173591Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:58.173591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WakNgFKXPR3nQAnc4VsMMZupjdifpPoybWCPXlZboVhZqJgF/C//EomtTFSeCNGLzT7GQB7RQfRjKX2PwSXkAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:58.174065Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.02747","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c8c68d3be45ea658c350b26ea12d1186f9b0c7e35a8b89d39d1319202696a19","sha256:d2eadd33b1d56506eef4c87c8f925cbea85925f1c29806e2fffdc5d809b72439"],"state_sha256":"0908a3e3acaa0ae7aa5927db0a498fcfed4731d776979ce1baca0f542df69191"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qczcsme7v/dBsj2qWszaekBZrG/ogtfwQ7Y0aQyF4ldRCKu6zInLL0eD/jR6HIA0MiOh0NIWqkxGrI551aulDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T02:46:00.953152Z","bundle_sha256":"047643367b6dcc4a7f449e08ec8385653fc3a0e12cda7dcbf090a2bced9ab060"}}