{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:QJ3JVDNDJWM3LNOFQIK6EL7LVY","short_pith_number":"pith:QJ3JVDND","canonical_record":{"source":{"id":"1808.07943","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-08-23T20:52:34Z","cross_cats_sorted":[],"title_canon_sha256":"eeba51af234e2539f3a71fa63630507611e6e9daea4f786a8691bb38016c99c0","abstract_canon_sha256":"9769d45f5b0745096142ad31e7ce6133209003be90664ee996cfc8677668e4f0"},"schema_version":"1.0"},"canonical_sha256":"82769a8da34d99b5b5c58215e22febae35fc3a7cab74c803deafe7004a372b76","source":{"kind":"arxiv","id":"1808.07943","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.07943","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"arxiv_version","alias_value":"1808.07943v2","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.07943","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"pith_short_12","alias_value":"QJ3JVDNDJWM3","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"QJ3JVDNDJWM3LNOF","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"QJ3JVDND","created_at":"2026-05-18T12:32:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:QJ3JVDNDJWM3LNOFQIK6EL7LVY","target":"record","payload":{"canonical_record":{"source":{"id":"1808.07943","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-08-23T20:52:34Z","cross_cats_sorted":[],"title_canon_sha256":"eeba51af234e2539f3a71fa63630507611e6e9daea4f786a8691bb38016c99c0","abstract_canon_sha256":"9769d45f5b0745096142ad31e7ce6133209003be90664ee996cfc8677668e4f0"},"schema_version":"1.0"},"canonical_sha256":"82769a8da34d99b5b5c58215e22febae35fc3a7cab74c803deafe7004a372b76","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:50.880749Z","signature_b64":"s9vcLLP3T8tcFawXDqX/wUA1vYkwRP3ESe9z65HWs0Th3xWwOqxEJp07K6drnO9H5uga/FWJdFcvvx8OSb/yAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"82769a8da34d99b5b5c58215e22febae35fc3a7cab74c803deafe7004a372b76","last_reissued_at":"2026-05-18T00:00:50.880279Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:50.880279Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.07943","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":"2026-05-18T00:00:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SUqVg5Co5YNlhwP9DtQNzGvcgjXAvYUQ5OiDXLdYcBhwUny83d9MQIF3xHgsKlSFBxrvd7vKEbH96EQtawLLAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T23:02:55.314227Z"},"content_sha256":"e7900298cb1067ab55e6cbed1c7b7e1401359b218ee5270a49973c8150c4b74e","schema_version":"1.0","event_id":"sha256:e7900298cb1067ab55e6cbed1c7b7e1401359b218ee5270a49973c8150c4b74e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:QJ3JVDNDJWM3LNOFQIK6EL7LVY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"NMR Frequency Shifts and Phase Identification in Superfluid $^3$He","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A. M. Zimmerman, M. D. Nguyen, W. P. Halperin","submitted_at":"2018-08-23T20:52:34Z","abstract_excerpt":"The pressure dependence of the order parameter in superfluid $^3$He is amazingly simple. In the Ginzburg-Landau regime, i.e. close to $T_c$, the square of the order parameter can be accurately measured by its proportionality to NMR frequency shifts and is strictly linear in pressure. This behavior is replicated for superfluid $^3$He imbibed in isotropic and anisotropic silica aerogels. The proportionality factor is constrained by the symmetry of the superfluid state and is an important signature of the corresponding superfluid phase. For the purpose of identifying various new superfluid states"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.07943","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":"2026-05-18T00:00:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AiBbb6yJeLtDf8mBWCIJPd+JnOCozGTVcVCnUXzwaw18hDU9aoHdGg79B42cBwgQOfDqgSuuW8Hidn4VqEylAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T23:02:55.314822Z"},"content_sha256":"c62cdf72e05055da69d3c81549331dba46594a3fc37b86d152a5f036a29ec914","schema_version":"1.0","event_id":"sha256:c62cdf72e05055da69d3c81549331dba46594a3fc37b86d152a5f036a29ec914"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QJ3JVDNDJWM3LNOFQIK6EL7LVY/bundle.json","state_url":"https://pith.science/pith/QJ3JVDNDJWM3LNOFQIK6EL7LVY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QJ3JVDNDJWM3LNOFQIK6EL7LVY/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":"2026-05-27T23:02:55Z","links":{"resolver":"https://pith.science/pith/QJ3JVDNDJWM3LNOFQIK6EL7LVY","bundle":"https://pith.science/pith/QJ3JVDNDJWM3LNOFQIK6EL7LVY/bundle.json","state":"https://pith.science/pith/QJ3JVDNDJWM3LNOFQIK6EL7LVY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QJ3JVDNDJWM3LNOFQIK6EL7LVY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:QJ3JVDNDJWM3LNOFQIK6EL7LVY","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":"9769d45f5b0745096142ad31e7ce6133209003be90664ee996cfc8677668e4f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-08-23T20:52:34Z","title_canon_sha256":"eeba51af234e2539f3a71fa63630507611e6e9daea4f786a8691bb38016c99c0"},"schema_version":"1.0","source":{"id":"1808.07943","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.07943","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"arxiv_version","alias_value":"1808.07943v2","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.07943","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"pith_short_12","alias_value":"QJ3JVDNDJWM3","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"QJ3JVDNDJWM3LNOF","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"QJ3JVDND","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:c62cdf72e05055da69d3c81549331dba46594a3fc37b86d152a5f036a29ec914","target":"graph","created_at":"2026-05-18T00:00:50Z","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":"The pressure dependence of the order parameter in superfluid $^3$He is amazingly simple. In the Ginzburg-Landau regime, i.e. close to $T_c$, the square of the order parameter can be accurately measured by its proportionality to NMR frequency shifts and is strictly linear in pressure. This behavior is replicated for superfluid $^3$He imbibed in isotropic and anisotropic silica aerogels. The proportionality factor is constrained by the symmetry of the superfluid state and is an important signature of the corresponding superfluid phase. For the purpose of identifying various new superfluid states","authors_text":"A. M. Zimmerman, M. D. Nguyen, W. P. Halperin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-08-23T20:52:34Z","title":"NMR Frequency Shifts and Phase Identification in Superfluid $^3$He"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.07943","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:e7900298cb1067ab55e6cbed1c7b7e1401359b218ee5270a49973c8150c4b74e","target":"record","created_at":"2026-05-18T00:00:50Z","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":"9769d45f5b0745096142ad31e7ce6133209003be90664ee996cfc8677668e4f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-08-23T20:52:34Z","title_canon_sha256":"eeba51af234e2539f3a71fa63630507611e6e9daea4f786a8691bb38016c99c0"},"schema_version":"1.0","source":{"id":"1808.07943","kind":"arxiv","version":2}},"canonical_sha256":"82769a8da34d99b5b5c58215e22febae35fc3a7cab74c803deafe7004a372b76","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"82769a8da34d99b5b5c58215e22febae35fc3a7cab74c803deafe7004a372b76","first_computed_at":"2026-05-18T00:00:50.880279Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:50.880279Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"s9vcLLP3T8tcFawXDqX/wUA1vYkwRP3ESe9z65HWs0Th3xWwOqxEJp07K6drnO9H5uga/FWJdFcvvx8OSb/yAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:50.880749Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.07943","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e7900298cb1067ab55e6cbed1c7b7e1401359b218ee5270a49973c8150c4b74e","sha256:c62cdf72e05055da69d3c81549331dba46594a3fc37b86d152a5f036a29ec914"],"state_sha256":"7437fb47f8ae6c37e3addd636df791c1e56213673572a582e1a31dbbd26775a1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xIRiIpp9tsNf1PgLjGmtOoRwS03KkPH0XHzWE78DKB34LgT+44jha+eTX+o1585SKjNv4qnx4cLernkGDX2wBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T23:02:55.317597Z","bundle_sha256":"72a3c10f7ad541794baee950da424ed6cb28ec1daeb071254a9704db44eb9283"}}