{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:UYVMQUAMJIKNHVQ2YITUW6PMBC","short_pith_number":"pith:UYVMQUAM","canonical_record":{"source":{"id":"physics/0701248","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"physics.plasm-ph","submitted_at":"2007-01-22T14:14:04Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"6719dd4b7c2c600b08c83b553e60a63cb25f9071ea597f9a39097abcc2cb5455","abstract_canon_sha256":"dfd86d1155491c0651802cbebf2aa253642f208405e5882bb137fe624494e409"},"schema_version":"1.0"},"canonical_sha256":"a62ac8500c4a14d3d61ac2274b79ec08a6ce67f6e73d1e36e1d26b634499f22c","source":{"kind":"arxiv","id":"physics/0701248","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0701248","created_at":"2026-05-18T03:56:24Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0701248v1","created_at":"2026-05-18T03:56:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0701248","created_at":"2026-05-18T03:56:24Z"},{"alias_kind":"pith_short_12","alias_value":"UYVMQUAMJIKN","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"UYVMQUAMJIKNHVQ2","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"UYVMQUAM","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:UYVMQUAMJIKNHVQ2YITUW6PMBC","target":"record","payload":{"canonical_record":{"source":{"id":"physics/0701248","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"physics.plasm-ph","submitted_at":"2007-01-22T14:14:04Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"6719dd4b7c2c600b08c83b553e60a63cb25f9071ea597f9a39097abcc2cb5455","abstract_canon_sha256":"dfd86d1155491c0651802cbebf2aa253642f208405e5882bb137fe624494e409"},"schema_version":"1.0"},"canonical_sha256":"a62ac8500c4a14d3d61ac2274b79ec08a6ce67f6e73d1e36e1d26b634499f22c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:56:24.731836Z","signature_b64":"aFHVj7ZQ9KAkuSDA0Lk1ohyfDgvwYhwXtvhafT5yoPGRMQYBZ8cQmhWhppNb9Zm61r2BoXLQAckLvMd7qY78AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a62ac8500c4a14d3d61ac2274b79ec08a6ce67f6e73d1e36e1d26b634499f22c","last_reissued_at":"2026-05-18T03:56:24.731223Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:56:24.731223Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"physics/0701248","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":"2026-05-18T03:56:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rsp4qTLALfpyUAUYujxRfXm7c25ynkRl5+5SgNqeE1OUxyeZ+l9rye8YbjDsl6vBO4mHnTx8UUaiEHBtcqQIBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T07:51:10.177866Z"},"content_sha256":"df82de07c6e3b5aa5516d1c4c41b0834a719109b40a857f583ae1a658f34218f","schema_version":"1.0","event_id":"sha256:df82de07c6e3b5aa5516d1c4c41b0834a719109b40a857f583ae1a658f34218f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:UYVMQUAMJIKNHVQ2YITUW6PMBC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum molecular dynamics simulations for the nonmetal-to-metal transition in fluid helium","license":"","headline":"","cross_cats":["physics.comp-ph"],"primary_cat":"physics.plasm-ph","authors_text":"Andre Kietzmann, Bastian Holst, Michael P. Desjarlais, Ronald Redmer, Thomas R. Mattsson","submitted_at":"2007-01-22T14:14:04Z","abstract_excerpt":"We have performed quantum molecular dynamics simulations for dense helium to study the nonmetal-to-metal transition at high pressures. We present new results for the equation of state and the Hugoniot curve in the warm dense matter region. The optical conductivity is calculated via the Kubo-Greenwood formula from which the dc conductivity is derived. The nonmetal-to-metal transition is identified at about 1 g/ccm. We compare with experimental results as well as with other theoretical approaches, especially with predictions of chemical models."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0701248","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":"2026-05-18T03:56:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DXi/karRf/hB/k3B218TmGZKAXrUxMrVZiX0Fq9ugQYxGetc83Zp/r/LUlirmrBtgxpK6w3a3Qjenlaqbj+BBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T07:51:10.178530Z"},"content_sha256":"1d28002c9b53703561006a0514000f58fac5449a7bedac1487b8a56a8c88d35b","schema_version":"1.0","event_id":"sha256:1d28002c9b53703561006a0514000f58fac5449a7bedac1487b8a56a8c88d35b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UYVMQUAMJIKNHVQ2YITUW6PMBC/bundle.json","state_url":"https://pith.science/pith/UYVMQUAMJIKNHVQ2YITUW6PMBC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UYVMQUAMJIKNHVQ2YITUW6PMBC/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":"2026-06-07T07:51:10Z","links":{"resolver":"https://pith.science/pith/UYVMQUAMJIKNHVQ2YITUW6PMBC","bundle":"https://pith.science/pith/UYVMQUAMJIKNHVQ2YITUW6PMBC/bundle.json","state":"https://pith.science/pith/UYVMQUAMJIKNHVQ2YITUW6PMBC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UYVMQUAMJIKNHVQ2YITUW6PMBC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:UYVMQUAMJIKNHVQ2YITUW6PMBC","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":"dfd86d1155491c0651802cbebf2aa253642f208405e5882bb137fe624494e409","cross_cats_sorted":["physics.comp-ph"],"license":"","primary_cat":"physics.plasm-ph","submitted_at":"2007-01-22T14:14:04Z","title_canon_sha256":"6719dd4b7c2c600b08c83b553e60a63cb25f9071ea597f9a39097abcc2cb5455"},"schema_version":"1.0","source":{"id":"physics/0701248","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0701248","created_at":"2026-05-18T03:56:24Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0701248v1","created_at":"2026-05-18T03:56:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0701248","created_at":"2026-05-18T03:56:24Z"},{"alias_kind":"pith_short_12","alias_value":"UYVMQUAMJIKN","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"UYVMQUAMJIKNHVQ2","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"UYVMQUAM","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:1d28002c9b53703561006a0514000f58fac5449a7bedac1487b8a56a8c88d35b","target":"graph","created_at":"2026-05-18T03:56:24Z","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 performed quantum molecular dynamics simulations for dense helium to study the nonmetal-to-metal transition at high pressures. We present new results for the equation of state and the Hugoniot curve in the warm dense matter region. The optical conductivity is calculated via the Kubo-Greenwood formula from which the dc conductivity is derived. The nonmetal-to-metal transition is identified at about 1 g/ccm. We compare with experimental results as well as with other theoretical approaches, especially with predictions of chemical models.","authors_text":"Andre Kietzmann, Bastian Holst, Michael P. Desjarlais, Ronald Redmer, Thomas R. Mattsson","cross_cats":["physics.comp-ph"],"headline":"","license":"","primary_cat":"physics.plasm-ph","submitted_at":"2007-01-22T14:14:04Z","title":"Quantum molecular dynamics simulations for the nonmetal-to-metal transition in fluid helium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0701248","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:df82de07c6e3b5aa5516d1c4c41b0834a719109b40a857f583ae1a658f34218f","target":"record","created_at":"2026-05-18T03:56:24Z","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":"dfd86d1155491c0651802cbebf2aa253642f208405e5882bb137fe624494e409","cross_cats_sorted":["physics.comp-ph"],"license":"","primary_cat":"physics.plasm-ph","submitted_at":"2007-01-22T14:14:04Z","title_canon_sha256":"6719dd4b7c2c600b08c83b553e60a63cb25f9071ea597f9a39097abcc2cb5455"},"schema_version":"1.0","source":{"id":"physics/0701248","kind":"arxiv","version":1}},"canonical_sha256":"a62ac8500c4a14d3d61ac2274b79ec08a6ce67f6e73d1e36e1d26b634499f22c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a62ac8500c4a14d3d61ac2274b79ec08a6ce67f6e73d1e36e1d26b634499f22c","first_computed_at":"2026-05-18T03:56:24.731223Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:56:24.731223Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aFHVj7ZQ9KAkuSDA0Lk1ohyfDgvwYhwXtvhafT5yoPGRMQYBZ8cQmhWhppNb9Zm61r2BoXLQAckLvMd7qY78AA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:56:24.731836Z","signed_message":"canonical_sha256_bytes"},"source_id":"physics/0701248","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:df82de07c6e3b5aa5516d1c4c41b0834a719109b40a857f583ae1a658f34218f","sha256:1d28002c9b53703561006a0514000f58fac5449a7bedac1487b8a56a8c88d35b"],"state_sha256":"77d4e613aa7ffaf63710a188fc6fe45795a6ebbc74dcb4c5e79962fbc5bb6a21"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EKC1frljcmHR3kFNFs6LJb5+YkDYGY+N9m+JHHQntRpggAbho5pDCPHtYLD7cWujeJP2iwnyzCjb6mFKeOiuCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T07:51:10.181962Z","bundle_sha256":"e38acd785d7ef4a11e1a71985f4f6072f08b999a5c39d2fd29273fa0e2bfc34d"}}