{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:DQ26UYIMKFZDYZLG4GP4332RQX","short_pith_number":"pith:DQ26UYIM","canonical_record":{"source":{"id":"1112.5998","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2011-12-27T18:25:40Z","cross_cats_sorted":[],"title_canon_sha256":"b2bee1f7646ddb88fdc9b6e348eec87f347033ca980267942a38ebab68f28a58","abstract_canon_sha256":"50d7129aa59feddf29ea5204fd1f804b7ae3a0d94055c07398addc62744d13d9"},"schema_version":"1.0"},"canonical_sha256":"1c35ea610c51723c6566e19fcdef5185f92ca0d40f9864a85573ac66bf4f42c6","source":{"kind":"arxiv","id":"1112.5998","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.5998","created_at":"2026-05-18T01:59:00Z"},{"alias_kind":"arxiv_version","alias_value":"1112.5998v2","created_at":"2026-05-18T01:59:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.5998","created_at":"2026-05-18T01:59:00Z"},{"alias_kind":"pith_short_12","alias_value":"DQ26UYIMKFZD","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"DQ26UYIMKFZDYZLG","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"DQ26UYIM","created_at":"2026-05-18T12:26:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:DQ26UYIMKFZDYZLG4GP4332RQX","target":"record","payload":{"canonical_record":{"source":{"id":"1112.5998","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2011-12-27T18:25:40Z","cross_cats_sorted":[],"title_canon_sha256":"b2bee1f7646ddb88fdc9b6e348eec87f347033ca980267942a38ebab68f28a58","abstract_canon_sha256":"50d7129aa59feddf29ea5204fd1f804b7ae3a0d94055c07398addc62744d13d9"},"schema_version":"1.0"},"canonical_sha256":"1c35ea610c51723c6566e19fcdef5185f92ca0d40f9864a85573ac66bf4f42c6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:59:00.220986Z","signature_b64":"u5NlvdRsuScVqPTelHohxtyF1Y/tXup2kBqNogwXxDZyhJvACGfr/JYTWeOay3khM4l1BAgvXT8qmBoItmk3DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1c35ea610c51723c6566e19fcdef5185f92ca0d40f9864a85573ac66bf4f42c6","last_reissued_at":"2026-05-18T01:59:00.220337Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:59:00.220337Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1112.5998","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:59:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OhBh0m0CTWoz0CUqHFDKIS2zv9Gouaam/wdkB2DtSRCRECiyeu6pUK60LbQnlTQPYtIX9Nx9NUk6FkMye+rnDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T16:29:33.226045Z"},"content_sha256":"ca8258cd763955849e110d739dc7ede55a7bafa0034a92137e5d303f61b59fe4","schema_version":"1.0","event_id":"sha256:ca8258cd763955849e110d739dc7ede55a7bafa0034a92137e5d303f61b59fe4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:DQ26UYIMKFZDYZLG4GP4332RQX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"$^4$He Crystal Quality and Rotational Response in a Transparent Torsional Oscillator","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.other","authors_text":"A. D. Fefferman, A. Haziot, J. T. West, M. H. W. Chan, S. Balibar, X. Rojas","submitted_at":"2011-12-27T18:25:40Z","abstract_excerpt":"We have studied natural purity $^{4}$He single crystals and polycrystals between 10 and 600 mK using a torsional oscillator with a 2 cm$^{3}$ rigid cell made of sapphire with a smooth geometry. As the temperature was lowered, we observed sample dependent but reproducible resonant frequency shifts that could be attributed to a supersolid fraction of order 0.1%. However, these shifts were observed with single crystals, not with polycrystals. Our results indicate that, in our case, the rotational anomaly of solid helium is more likely due to a change in stiffness than to supersolidity. This inter"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.5998","kind":"arxiv","version":2},"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":"2026-05-18T01:59:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZIaidJsJqm/FMuFrDjG3zch+QO/LBRLmU721JjGFbakNt92rogLTNX2Z/Jtlqx3ABTK0zypI7lAau9a9RAd+Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T16:29:33.226398Z"},"content_sha256":"8329f24f6b3c55ab9238c9e7fb22c79c93e12e8dcafc31bee7fc705d296d2794","schema_version":"1.0","event_id":"sha256:8329f24f6b3c55ab9238c9e7fb22c79c93e12e8dcafc31bee7fc705d296d2794"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DQ26UYIMKFZDYZLG4GP4332RQX/bundle.json","state_url":"https://pith.science/pith/DQ26UYIMKFZDYZLG4GP4332RQX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DQ26UYIMKFZDYZLG4GP4332RQX/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":"2026-06-24T16:29:33Z","links":{"resolver":"https://pith.science/pith/DQ26UYIMKFZDYZLG4GP4332RQX","bundle":"https://pith.science/pith/DQ26UYIMKFZDYZLG4GP4332RQX/bundle.json","state":"https://pith.science/pith/DQ26UYIMKFZDYZLG4GP4332RQX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DQ26UYIMKFZDYZLG4GP4332RQX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:DQ26UYIMKFZDYZLG4GP4332RQX","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":"50d7129aa59feddf29ea5204fd1f804b7ae3a0d94055c07398addc62744d13d9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2011-12-27T18:25:40Z","title_canon_sha256":"b2bee1f7646ddb88fdc9b6e348eec87f347033ca980267942a38ebab68f28a58"},"schema_version":"1.0","source":{"id":"1112.5998","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.5998","created_at":"2026-05-18T01:59:00Z"},{"alias_kind":"arxiv_version","alias_value":"1112.5998v2","created_at":"2026-05-18T01:59:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.5998","created_at":"2026-05-18T01:59:00Z"},{"alias_kind":"pith_short_12","alias_value":"DQ26UYIMKFZD","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"DQ26UYIMKFZDYZLG","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"DQ26UYIM","created_at":"2026-05-18T12:26:26Z"}],"graph_snapshots":[{"event_id":"sha256:8329f24f6b3c55ab9238c9e7fb22c79c93e12e8dcafc31bee7fc705d296d2794","target":"graph","created_at":"2026-05-18T01:59:00Z","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 studied natural purity $^{4}$He single crystals and polycrystals between 10 and 600 mK using a torsional oscillator with a 2 cm$^{3}$ rigid cell made of sapphire with a smooth geometry. As the temperature was lowered, we observed sample dependent but reproducible resonant frequency shifts that could be attributed to a supersolid fraction of order 0.1%. However, these shifts were observed with single crystals, not with polycrystals. Our results indicate that, in our case, the rotational anomaly of solid helium is more likely due to a change in stiffness than to supersolidity. This inter","authors_text":"A. D. Fefferman, A. Haziot, J. T. West, M. H. W. Chan, S. Balibar, X. Rojas","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2011-12-27T18:25:40Z","title":"$^4$He Crystal Quality and Rotational Response in a Transparent Torsional Oscillator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.5998","kind":"arxiv","version":2},"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:ca8258cd763955849e110d739dc7ede55a7bafa0034a92137e5d303f61b59fe4","target":"record","created_at":"2026-05-18T01:59:00Z","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":"50d7129aa59feddf29ea5204fd1f804b7ae3a0d94055c07398addc62744d13d9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2011-12-27T18:25:40Z","title_canon_sha256":"b2bee1f7646ddb88fdc9b6e348eec87f347033ca980267942a38ebab68f28a58"},"schema_version":"1.0","source":{"id":"1112.5998","kind":"arxiv","version":2}},"canonical_sha256":"1c35ea610c51723c6566e19fcdef5185f92ca0d40f9864a85573ac66bf4f42c6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1c35ea610c51723c6566e19fcdef5185f92ca0d40f9864a85573ac66bf4f42c6","first_computed_at":"2026-05-18T01:59:00.220337Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:59:00.220337Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u5NlvdRsuScVqPTelHohxtyF1Y/tXup2kBqNogwXxDZyhJvACGfr/JYTWeOay3khM4l1BAgvXT8qmBoItmk3DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:59:00.220986Z","signed_message":"canonical_sha256_bytes"},"source_id":"1112.5998","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca8258cd763955849e110d739dc7ede55a7bafa0034a92137e5d303f61b59fe4","sha256:8329f24f6b3c55ab9238c9e7fb22c79c93e12e8dcafc31bee7fc705d296d2794"],"state_sha256":"e1c6e39682c586f1056189dd76f39ff9359fde3df15e76d4b00973df8de4e338"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z94auYz2n2FbgLYbxW0dtDM68JGNlfBCgJm1crKakNNJoWNW0uYGpIPUknMWoMFQ6ndqoVQN1vXFzPsrQV0pAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T16:29:33.228306Z","bundle_sha256":"033e9d757d29579607e203b90389901df389282490bda813a38041ccb27e6bbd"}}