{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1995:F5E7ALJTYU2QRCX43NTWIKYF6H","short_pith_number":"pith:F5E7ALJT","canonical_record":{"source":{"id":"cond-mat/9502120","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat","submitted_at":"1995-02-28T23:15:10Z","cross_cats_sorted":[],"title_canon_sha256":"13b622872b2533411b7e305089928844d096574b347480511f44fcf2ddf882a1","abstract_canon_sha256":"2bf3a2e7e9f803d7b019606673ea3cf027c73b10b294e607c921b4788ec0961e"},"schema_version":"1.0"},"canonical_sha256":"2f49f02d33c535088afcdb67642b05f1f1924276a5a5e21376d9090f7ab599de","source":{"kind":"arxiv","id":"cond-mat/9502120","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9502120","created_at":"2026-05-18T01:07:11Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9502120v1","created_at":"2026-05-18T01:07:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9502120","created_at":"2026-05-18T01:07:11Z"},{"alias_kind":"pith_short_12","alias_value":"F5E7ALJTYU2Q","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"F5E7ALJTYU2QRCX4","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"F5E7ALJT","created_at":"2026-05-18T12:25:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1995:F5E7ALJTYU2QRCX43NTWIKYF6H","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/9502120","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat","submitted_at":"1995-02-28T23:15:10Z","cross_cats_sorted":[],"title_canon_sha256":"13b622872b2533411b7e305089928844d096574b347480511f44fcf2ddf882a1","abstract_canon_sha256":"2bf3a2e7e9f803d7b019606673ea3cf027c73b10b294e607c921b4788ec0961e"},"schema_version":"1.0"},"canonical_sha256":"2f49f02d33c535088afcdb67642b05f1f1924276a5a5e21376d9090f7ab599de","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:11.851740Z","signature_b64":"utTA/OnKdd5PRdePk6B1DB41k8MJShvTVTnGARoTA9I9aa2PsT2wowuEfYbA8Q/kRKTYAKPCWQ7S1MZpuJunDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2f49f02d33c535088afcdb67642b05f1f1924276a5a5e21376d9090f7ab599de","last_reissued_at":"2026-05-18T01:07:11.851338Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:11.851338Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/9502120","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":"2026-05-18T01:07:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jESQX/IghGiSofryW/LZwVg3/WfUhI4GRQnuZVgUdnvphfDtoRBI/FghFo5dEbXYQdTs8tZd9AojaZNLJJ+BCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:18:51.202971Z"},"content_sha256":"a944ee9ceb7f217cd85520d9dcb7de130ef8c5abc7d2d1f6a843207a049ae19c","schema_version":"1.0","event_id":"sha256:a944ee9ceb7f217cd85520d9dcb7de130ef8c5abc7d2d1f6a843207a049ae19c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1995:F5E7ALJTYU2QRCX43NTWIKYF6H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Critical Behaviour of Superfluid $^4$He in Aerogel","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat","authors_text":"K. Moon, S. M. Girvin","submitted_at":"1995-02-28T23:15:10Z","abstract_excerpt":"We report on Monte Carlo studies of the critical behaviour of superfluid $^4$He in the presence of quenched disorder with long-range fractal correlations. According to the heuristic argument by Harris, uncorrelated disorder is irrelevant when the specific heat critical exponent $\\alpha$ is negative, which is the case for the pure $^4$He. However, experiments on helium in aerogel\n have shown that the superfluid density critical exponent $\\zeta$ changes. We hypothesize that this is a cross-over effect due to the fractal nature of aerogel. Modelling the aerogel as an incipient percolating cluster"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9502120","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":"2026-05-18T01:07:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zLmo3VYEBKVcUHNBdZtxW/8Xkv8kKMq6q2v/D4pA3EPRBGSqNf57Z9J8Cqw0R/qUtbvs/SiNnJYED78VFS5pDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:18:51.203529Z"},"content_sha256":"1f488ee7230bac6a4608b8d22c235e88bd9d6929733ad247bf989dfd014cbfb6","schema_version":"1.0","event_id":"sha256:1f488ee7230bac6a4608b8d22c235e88bd9d6929733ad247bf989dfd014cbfb6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F5E7ALJTYU2QRCX43NTWIKYF6H/bundle.json","state_url":"https://pith.science/pith/F5E7ALJTYU2QRCX43NTWIKYF6H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F5E7ALJTYU2QRCX43NTWIKYF6H/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":"2026-05-30T10:18:51Z","links":{"resolver":"https://pith.science/pith/F5E7ALJTYU2QRCX43NTWIKYF6H","bundle":"https://pith.science/pith/F5E7ALJTYU2QRCX43NTWIKYF6H/bundle.json","state":"https://pith.science/pith/F5E7ALJTYU2QRCX43NTWIKYF6H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F5E7ALJTYU2QRCX43NTWIKYF6H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1995:F5E7ALJTYU2QRCX43NTWIKYF6H","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":"2bf3a2e7e9f803d7b019606673ea3cf027c73b10b294e607c921b4788ec0961e","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat","submitted_at":"1995-02-28T23:15:10Z","title_canon_sha256":"13b622872b2533411b7e305089928844d096574b347480511f44fcf2ddf882a1"},"schema_version":"1.0","source":{"id":"cond-mat/9502120","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9502120","created_at":"2026-05-18T01:07:11Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9502120v1","created_at":"2026-05-18T01:07:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9502120","created_at":"2026-05-18T01:07:11Z"},{"alias_kind":"pith_short_12","alias_value":"F5E7ALJTYU2Q","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"F5E7ALJTYU2QRCX4","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"F5E7ALJT","created_at":"2026-05-18T12:25:47Z"}],"graph_snapshots":[{"event_id":"sha256:1f488ee7230bac6a4608b8d22c235e88bd9d6929733ad247bf989dfd014cbfb6","target":"graph","created_at":"2026-05-18T01:07:11Z","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 report on Monte Carlo studies of the critical behaviour of superfluid $^4$He in the presence of quenched disorder with long-range fractal correlations. According to the heuristic argument by Harris, uncorrelated disorder is irrelevant when the specific heat critical exponent $\\alpha$ is negative, which is the case for the pure $^4$He. However, experiments on helium in aerogel\n have shown that the superfluid density critical exponent $\\zeta$ changes. We hypothesize that this is a cross-over effect due to the fractal nature of aerogel. Modelling the aerogel as an incipient percolating cluster","authors_text":"K. Moon, S. M. Girvin","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat","submitted_at":"1995-02-28T23:15:10Z","title":"Critical Behaviour of Superfluid $^4$He in Aerogel"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9502120","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:a944ee9ceb7f217cd85520d9dcb7de130ef8c5abc7d2d1f6a843207a049ae19c","target":"record","created_at":"2026-05-18T01:07:11Z","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":"2bf3a2e7e9f803d7b019606673ea3cf027c73b10b294e607c921b4788ec0961e","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat","submitted_at":"1995-02-28T23:15:10Z","title_canon_sha256":"13b622872b2533411b7e305089928844d096574b347480511f44fcf2ddf882a1"},"schema_version":"1.0","source":{"id":"cond-mat/9502120","kind":"arxiv","version":1}},"canonical_sha256":"2f49f02d33c535088afcdb67642b05f1f1924276a5a5e21376d9090f7ab599de","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2f49f02d33c535088afcdb67642b05f1f1924276a5a5e21376d9090f7ab599de","first_computed_at":"2026-05-18T01:07:11.851338Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:11.851338Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"utTA/OnKdd5PRdePk6B1DB41k8MJShvTVTnGARoTA9I9aa2PsT2wowuEfYbA8Q/kRKTYAKPCWQ7S1MZpuJunDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:11.851740Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9502120","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a944ee9ceb7f217cd85520d9dcb7de130ef8c5abc7d2d1f6a843207a049ae19c","sha256:1f488ee7230bac6a4608b8d22c235e88bd9d6929733ad247bf989dfd014cbfb6"],"state_sha256":"f81fe2cbb40606f5d389aa615ffb91d943e469cabd0e8c79989b85970b295548"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3ywoArymk+JyDYlzNy20LKWP8sxgPvJBgfsn4V40MvJfW85kaDlv6jWmUIueR/eJ+RtzzZdFA9rL8mHcM0NkBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T10:18:51.206682Z","bundle_sha256":"cc0387b7d15fd9fa7619694eb0d48aa2e37957c52c20d010977bdd3d14f86a89"}}