{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:4JC4LKSW7YSFI42PPHVGU63BZK","short_pith_number":"pith:4JC4LKSW","canonical_record":{"source":{"id":"1504.03550","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2015-04-14T14:00:51Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"c14094099c42b3a99a5602a8e64394dbd043017b042a0af6732c7130f050adc2","abstract_canon_sha256":"c1f257580c1aee0a269cb9d29a0f8292a6476d40d40ade46b7af541e9c0809d4"},"schema_version":"1.0"},"canonical_sha256":"e245c5aa56fe2454734f79ea6a7b61cabab28015b0726cadc278af81cc9f9f60","source":{"kind":"arxiv","id":"1504.03550","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.03550","created_at":"2026-05-18T02:18:50Z"},{"alias_kind":"arxiv_version","alias_value":"1504.03550v1","created_at":"2026-05-18T02:18:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.03550","created_at":"2026-05-18T02:18:50Z"},{"alias_kind":"pith_short_12","alias_value":"4JC4LKSW7YSF","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4JC4LKSW7YSFI42P","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4JC4LKSW","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:4JC4LKSW7YSFI42PPHVGU63BZK","target":"record","payload":{"canonical_record":{"source":{"id":"1504.03550","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2015-04-14T14:00:51Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"c14094099c42b3a99a5602a8e64394dbd043017b042a0af6732c7130f050adc2","abstract_canon_sha256":"c1f257580c1aee0a269cb9d29a0f8292a6476d40d40ade46b7af541e9c0809d4"},"schema_version":"1.0"},"canonical_sha256":"e245c5aa56fe2454734f79ea6a7b61cabab28015b0726cadc278af81cc9f9f60","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:18:50.602384Z","signature_b64":"fJz8ms60oADNA8fKeialp87b2ocFuySabyexHqZNhNIK2QxjnNGc0pmo+n9lhgU6tnb1Fxqhv2nC/J+CXA3oAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e245c5aa56fe2454734f79ea6a7b61cabab28015b0726cadc278af81cc9f9f60","last_reissued_at":"2026-05-18T02:18:50.601838Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:18:50.601838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.03550","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:18:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VGl/AptLNDzmqVt3xxLBM5h0HtFkM//KmykHdjDPhi96hjaNKBRp3jZLEFPyD/hjxN2s+vaS+1fhjiv4qmCXCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T01:39:26.892100Z"},"content_sha256":"c11bfd1e092d7d70c85acee9891b8f3f7234eccf68e4395ac12925effe63d6f4","schema_version":"1.0","event_id":"sha256:c11bfd1e092d7d70c85acee9891b8f3f7234eccf68e4395ac12925effe63d6f4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:4JC4LKSW7YSFI42PPHVGU63BZK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cavitation Density of Superfluid Helium-4 around 1 K","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"cond-mat.other","authors_text":"An Qu, Azer Trimeche, Jacques Dupont-roc, Jules Grucker, Philippe Jacquier","submitted_at":"2015-04-14T14:00:51Z","abstract_excerpt":"Using an optical interferomertric method, the homogeneous cavitation density of superfluid helium at $T=0.96\\,$K is measured and found to be $\\rho_{cav}=0.1338\\pm0.0002\\rm\\,g.cm^{-3}$. A well established equation of state for liquid helium at negative pressures converts this to the cavitation pressure $P_{cav}=-5.1\\pm0.1\\,$bar. This cavitation pressure is consistent with a model taking into account the presence of quantized vortices, but disagrees with previously published experimental values of $P_{cav}$."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.03550","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:18:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ESFPUw/H7cT0z3AezfH3GBLYFsDhCuycOflFi2eN0oh3cKbKsFAPJvkJSpW/rzWZ7Y+/FO9q8FWnKMW1LYI+CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T01:39:26.892749Z"},"content_sha256":"9e1e4de739e1d6cc06a90bb87bbc092717488472677a71fbec130f1d1b29966b","schema_version":"1.0","event_id":"sha256:9e1e4de739e1d6cc06a90bb87bbc092717488472677a71fbec130f1d1b29966b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4JC4LKSW7YSFI42PPHVGU63BZK/bundle.json","state_url":"https://pith.science/pith/4JC4LKSW7YSFI42PPHVGU63BZK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4JC4LKSW7YSFI42PPHVGU63BZK/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":"2026-06-04T01:39:26Z","links":{"resolver":"https://pith.science/pith/4JC4LKSW7YSFI42PPHVGU63BZK","bundle":"https://pith.science/pith/4JC4LKSW7YSFI42PPHVGU63BZK/bundle.json","state":"https://pith.science/pith/4JC4LKSW7YSFI42PPHVGU63BZK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4JC4LKSW7YSFI42PPHVGU63BZK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:4JC4LKSW7YSFI42PPHVGU63BZK","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":"c1f257580c1aee0a269cb9d29a0f8292a6476d40d40ade46b7af541e9c0809d4","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2015-04-14T14:00:51Z","title_canon_sha256":"c14094099c42b3a99a5602a8e64394dbd043017b042a0af6732c7130f050adc2"},"schema_version":"1.0","source":{"id":"1504.03550","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.03550","created_at":"2026-05-18T02:18:50Z"},{"alias_kind":"arxiv_version","alias_value":"1504.03550v1","created_at":"2026-05-18T02:18:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.03550","created_at":"2026-05-18T02:18:50Z"},{"alias_kind":"pith_short_12","alias_value":"4JC4LKSW7YSF","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4JC4LKSW7YSFI42P","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4JC4LKSW","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:9e1e4de739e1d6cc06a90bb87bbc092717488472677a71fbec130f1d1b29966b","target":"graph","created_at":"2026-05-18T02:18:50Z","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 an optical interferomertric method, the homogeneous cavitation density of superfluid helium at $T=0.96\\,$K is measured and found to be $\\rho_{cav}=0.1338\\pm0.0002\\rm\\,g.cm^{-3}$. A well established equation of state for liquid helium at negative pressures converts this to the cavitation pressure $P_{cav}=-5.1\\pm0.1\\,$bar. This cavitation pressure is consistent with a model taking into account the presence of quantized vortices, but disagrees with previously published experimental values of $P_{cav}$.","authors_text":"An Qu, Azer Trimeche, Jacques Dupont-roc, Jules Grucker, Philippe Jacquier","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2015-04-14T14:00:51Z","title":"Cavitation Density of Superfluid Helium-4 around 1 K"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.03550","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:c11bfd1e092d7d70c85acee9891b8f3f7234eccf68e4395ac12925effe63d6f4","target":"record","created_at":"2026-05-18T02:18:50Z","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":"c1f257580c1aee0a269cb9d29a0f8292a6476d40d40ade46b7af541e9c0809d4","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2015-04-14T14:00:51Z","title_canon_sha256":"c14094099c42b3a99a5602a8e64394dbd043017b042a0af6732c7130f050adc2"},"schema_version":"1.0","source":{"id":"1504.03550","kind":"arxiv","version":1}},"canonical_sha256":"e245c5aa56fe2454734f79ea6a7b61cabab28015b0726cadc278af81cc9f9f60","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e245c5aa56fe2454734f79ea6a7b61cabab28015b0726cadc278af81cc9f9f60","first_computed_at":"2026-05-18T02:18:50.601838Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:18:50.601838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fJz8ms60oADNA8fKeialp87b2ocFuySabyexHqZNhNIK2QxjnNGc0pmo+n9lhgU6tnb1Fxqhv2nC/J+CXA3oAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:18:50.602384Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.03550","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c11bfd1e092d7d70c85acee9891b8f3f7234eccf68e4395ac12925effe63d6f4","sha256:9e1e4de739e1d6cc06a90bb87bbc092717488472677a71fbec130f1d1b29966b"],"state_sha256":"22db38431011946a2e5654b840e1ead183cc999d768911e5824f79aa86da0700"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bffPM6jdyV0o757/luPisaKCxmPwXj/gNUInawDikILTevd0ZFTu4GUIEQNwsXA7qSYzd9svLLtMChVJO4FlAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T01:39:26.896090Z","bundle_sha256":"7767dc61cea2abad107d0885630a47b44bc0ab86e57303ccc58b5fc93af1a158"}}