{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:6PXPX6MYM67YMXVKEWZJKNEODI","short_pith_number":"pith:6PXPX6MY","schema_version":"1.0","canonical_sha256":"f3eefbf99867bf865eaa25b295348e1a14d7cd54ee93cdf2b0725617932cb3bd","source":{"kind":"arxiv","id":"2306.07538","version":1},"attestation_state":"computed","paper":{"title":"Quantum Stochastic Molecular Dynamics Simulations of the Viscosity of Superfluid Helium","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.chem-ph","physics.comp-ph","quant-ph"],"primary_cat":"cond-mat.stat-mech","authors_text":"Phil Attard","submitted_at":"2023-06-13T05:05:22Z","abstract_excerpt":"Decoherent quantum equations of motion are derived that yield the trajectory of an open quantum system. The viscosity of superfluid Lennard-Jones helium-4 is obtained with a quantum stochastic molecular dynamics algorithm. The momentum state occupancy entropy is counted with a continuous representation of boson number and averages are obtained with umbrella sampling. Instantaneous snapshots of the Bose-Einstein condensed system show multiple highly occupied momentum states. The viscosity is obtained from the Onsager-Green-Kubo relation with the time correlation function modified in the quantum"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2306.07538","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2023-06-13T05:05:22Z","cross_cats_sorted":["physics.chem-ph","physics.comp-ph","quant-ph"],"title_canon_sha256":"39ab2062a3a6bbd9425f2628a33fbcbd6aeabb3ab9aaef1db0d298bd669fd9b9","abstract_canon_sha256":"e6ce585b46fb1b2cfe5ee278b8a35a592980c68b595d2cb1169c122967028474"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:20:05.967990Z","signature_b64":"CMskWf9aAndgAtyCu19yPztTMIXMa6Qb28ViYU0NVO9TrosAT5m1N9sewEP6eR9YTzaUwGFVqcLWs97TEXNiDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f3eefbf99867bf865eaa25b295348e1a14d7cd54ee93cdf2b0725617932cb3bd","last_reissued_at":"2026-07-05T06:20:05.967588Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:20:05.967588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Quantum Stochastic Molecular Dynamics Simulations of the Viscosity of Superfluid Helium","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.chem-ph","physics.comp-ph","quant-ph"],"primary_cat":"cond-mat.stat-mech","authors_text":"Phil Attard","submitted_at":"2023-06-13T05:05:22Z","abstract_excerpt":"Decoherent quantum equations of motion are derived that yield the trajectory of an open quantum system. The viscosity of superfluid Lennard-Jones helium-4 is obtained with a quantum stochastic molecular dynamics algorithm. The momentum state occupancy entropy is counted with a continuous representation of boson number and averages are obtained with umbrella sampling. Instantaneous snapshots of the Bose-Einstein condensed system show multiple highly occupied momentum states. The viscosity is obtained from the Onsager-Green-Kubo relation with the time correlation function modified in the quantum"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.07538","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2306.07538/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2306.07538","created_at":"2026-07-05T06:20:05.967644+00:00"},{"alias_kind":"arxiv_version","alias_value":"2306.07538v1","created_at":"2026-07-05T06:20:05.967644+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.07538","created_at":"2026-07-05T06:20:05.967644+00:00"},{"alias_kind":"pith_short_12","alias_value":"6PXPX6MYM67Y","created_at":"2026-07-05T06:20:05.967644+00:00"},{"alias_kind":"pith_short_16","alias_value":"6PXPX6MYM67YMXVK","created_at":"2026-07-05T06:20:05.967644+00:00"},{"alias_kind":"pith_short_8","alias_value":"6PXPX6MY","created_at":"2026-07-05T06:20:05.967644+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2501.16363","citing_title":"Ten Equations that Shook the Quantum World: Bose-Einstein Condensation, Superfluidity, and the Quantum-Classical Transition","ref_index":6,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/6PXPX6MYM67YMXVKEWZJKNEODI","json":"https://pith.science/pith/6PXPX6MYM67YMXVKEWZJKNEODI.json","graph_json":"https://pith.science/api/pith-number/6PXPX6MYM67YMXVKEWZJKNEODI/graph.json","events_json":"https://pith.science/api/pith-number/6PXPX6MYM67YMXVKEWZJKNEODI/events.json","paper":"https://pith.science/paper/6PXPX6MY"},"agent_actions":{"view_html":"https://pith.science/pith/6PXPX6MYM67YMXVKEWZJKNEODI","download_json":"https://pith.science/pith/6PXPX6MYM67YMXVKEWZJKNEODI.json","view_paper":"https://pith.science/paper/6PXPX6MY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2306.07538&json=true","fetch_graph":"https://pith.science/api/pith-number/6PXPX6MYM67YMXVKEWZJKNEODI/graph.json","fetch_events":"https://pith.science/api/pith-number/6PXPX6MYM67YMXVKEWZJKNEODI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6PXPX6MYM67YMXVKEWZJKNEODI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6PXPX6MYM67YMXVKEWZJKNEODI/action/storage_attestation","attest_author":"https://pith.science/pith/6PXPX6MYM67YMXVKEWZJKNEODI/action/author_attestation","sign_citation":"https://pith.science/pith/6PXPX6MYM67YMXVKEWZJKNEODI/action/citation_signature","submit_replication":"https://pith.science/pith/6PXPX6MYM67YMXVKEWZJKNEODI/action/replication_record"}},"created_at":"2026-07-05T06:20:05.967644+00:00","updated_at":"2026-07-05T06:20:05.967644+00:00"}