{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:L3QRPMDLOP5XMCRSFP6R5O46PZ","short_pith_number":"pith:L3QRPMDL","schema_version":"1.0","canonical_sha256":"5ee117b06b73fb760a322bfd1ebb9e7e6428328816c390c7bf3acaf9c9fce880","source":{"kind":"arxiv","id":"1111.4870","version":3},"attestation_state":"computed","paper":{"title":"Anomalous Nuclear Quantum Effects in Ice","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"B. Pamuk, C. P. Herrero, J. M. Soler, M. V. Fernandez-Serra, P. B. Allen, P. W. Stephens, R. Ramirez","submitted_at":"2011-11-21T13:45:58Z","abstract_excerpt":"One striking anomaly of water ice has been largely neglected and never explained. Replacing hydrogen ($^1$H) by deuterium ($^2$H) causes ice to expand, whereas the \"normal\" isotope effect is volume contraction with increased mass. Furthermore, the anomaly increases with temperature $T$, even though a normal isotope shift should decrease with $T$ and vanish when $T$ is high enough to use classical nuclear motions. In this study, we show that these effects are very well described by {\\it ab initio} density functional theory. Our theoretical modeling explains these anomalies, and allows us to pre"},"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":"1111.4870","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-11-21T13:45:58Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"2a6ee66c159611a422c5e67acaf98f363ae45c45bd901d1f3b57c0e28375cee8","abstract_canon_sha256":"b0642cd9ebc21b72fc6fcbc771f7cf3bcac2934dc7c7a451c3e6f3c6dd9f9f0e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:49:10.376226Z","signature_b64":"mhRHaEaqMB610+UjPZLdDqxXhaTQgcWcuWIhZVUdYGCC70m/nYiTj5lY06ToWs7wmrvZhfLm6VakBzARW9ETBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5ee117b06b73fb760a322bfd1ebb9e7e6428328816c390c7bf3acaf9c9fce880","last_reissued_at":"2026-05-18T03:49:10.375783Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:49:10.375783Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Anomalous Nuclear Quantum Effects in Ice","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"B. Pamuk, C. P. Herrero, J. M. Soler, M. V. Fernandez-Serra, P. B. Allen, P. W. Stephens, R. Ramirez","submitted_at":"2011-11-21T13:45:58Z","abstract_excerpt":"One striking anomaly of water ice has been largely neglected and never explained. Replacing hydrogen ($^1$H) by deuterium ($^2$H) causes ice to expand, whereas the \"normal\" isotope effect is volume contraction with increased mass. Furthermore, the anomaly increases with temperature $T$, even though a normal isotope shift should decrease with $T$ and vanish when $T$ is high enough to use classical nuclear motions. In this study, we show that these effects are very well described by {\\it ab initio} density functional theory. Our theoretical modeling explains these anomalies, and allows us to pre"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.4870","kind":"arxiv","version":3},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1111.4870","created_at":"2026-05-18T03:49:10.375853+00:00"},{"alias_kind":"arxiv_version","alias_value":"1111.4870v3","created_at":"2026-05-18T03:49:10.375853+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.4870","created_at":"2026-05-18T03:49:10.375853+00:00"},{"alias_kind":"pith_short_12","alias_value":"L3QRPMDLOP5X","created_at":"2026-05-18T12:26:34.985390+00:00"},{"alias_kind":"pith_short_16","alias_value":"L3QRPMDLOP5XMCRS","created_at":"2026-05-18T12:26:34.985390+00:00"},{"alias_kind":"pith_short_8","alias_value":"L3QRPMDL","created_at":"2026-05-18T12:26:34.985390+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/L3QRPMDLOP5XMCRSFP6R5O46PZ","json":"https://pith.science/pith/L3QRPMDLOP5XMCRSFP6R5O46PZ.json","graph_json":"https://pith.science/api/pith-number/L3QRPMDLOP5XMCRSFP6R5O46PZ/graph.json","events_json":"https://pith.science/api/pith-number/L3QRPMDLOP5XMCRSFP6R5O46PZ/events.json","paper":"https://pith.science/paper/L3QRPMDL"},"agent_actions":{"view_html":"https://pith.science/pith/L3QRPMDLOP5XMCRSFP6R5O46PZ","download_json":"https://pith.science/pith/L3QRPMDLOP5XMCRSFP6R5O46PZ.json","view_paper":"https://pith.science/paper/L3QRPMDL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1111.4870&json=true","fetch_graph":"https://pith.science/api/pith-number/L3QRPMDLOP5XMCRSFP6R5O46PZ/graph.json","fetch_events":"https://pith.science/api/pith-number/L3QRPMDLOP5XMCRSFP6R5O46PZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/L3QRPMDLOP5XMCRSFP6R5O46PZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/L3QRPMDLOP5XMCRSFP6R5O46PZ/action/storage_attestation","attest_author":"https://pith.science/pith/L3QRPMDLOP5XMCRSFP6R5O46PZ/action/author_attestation","sign_citation":"https://pith.science/pith/L3QRPMDLOP5XMCRSFP6R5O46PZ/action/citation_signature","submit_replication":"https://pith.science/pith/L3QRPMDLOP5XMCRSFP6R5O46PZ/action/replication_record"}},"created_at":"2026-05-18T03:49:10.375853+00:00","updated_at":"2026-05-18T03:49:10.375853+00:00"}