{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:B73FZL2CMIRUM6VNRVWQP75426","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":"7ce81c9bc0bc640a74c3db52e2655cbf3de7a773eab6ea0e59673604a1f4349b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-08-14T18:00:01Z","title_canon_sha256":"22a150fbf718811e5451d63acbab6a87cca2aee256ae2ce2245b661b38369ed1"},"schema_version":"1.0","source":{"id":"1808.04820","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.04820","created_at":"2026-05-17T23:42:58Z"},{"alias_kind":"arxiv_version","alias_value":"1808.04820v1","created_at":"2026-05-17T23:42:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.04820","created_at":"2026-05-17T23:42:58Z"},{"alias_kind":"pith_short_12","alias_value":"B73FZL2CMIRU","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"B73FZL2CMIRUM6VN","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"B73FZL2C","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:4e80f4615f3037704b3d0c03b69de25540187a020949e611cc342709914e3d54","target":"graph","created_at":"2026-05-17T23:42:58Z","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":"A new method to measure the superconducting stiffness tensor $\\overline{\\rho}_s$, without subjecting the sample to magnetic field, is applied to La$_{1.875}$Sr$_{0.125}$CuO$_4$ (LSCO). The method is based on the London equation $\\bf{J}=-\\overline{\\rho}_s \\bf{A}$, where $\\bf{J}$ is the current density and $\\bf{A}$ is the vector potential. Using rotor free $\\bf{A}$ and measuring $\\bf{J}$ via the magnetic moment of superconducting rings, we extract $\\overline{\\rho}_s$ at $T\\rightarrow T_c$. The technique, named Stiffnessometer, is sensitive to very small stiffness, which translates to penetration","authors_text":"Amit Keren, Itzik Kapon, Nir Gavish, Thomas Prokscha, Zaher Salman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-08-14T18:00:01Z","title":"The nature of the phase transition in the cuprates as revealed by a magnetic field free stiffness meter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.04820","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":"sha256:2d5821fd497b9ac71cdf58460d42d4af81c1444fbc12dee1dbf26603b115027b","target":"record","created_at":"2026-05-17T23:42:58Z","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":"7ce81c9bc0bc640a74c3db52e2655cbf3de7a773eab6ea0e59673604a1f4349b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-08-14T18:00:01Z","title_canon_sha256":"22a150fbf718811e5451d63acbab6a87cca2aee256ae2ce2245b661b38369ed1"},"schema_version":"1.0","source":{"id":"1808.04820","kind":"arxiv","version":1}},"canonical_sha256":"0ff65caf426223467aad8d6d07ffbcd78da5d2b698b37eb3ecf3f2ec7d15d238","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0ff65caf426223467aad8d6d07ffbcd78da5d2b698b37eb3ecf3f2ec7d15d238","first_computed_at":"2026-05-17T23:42:58.888024Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:58.888024Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i84tDMlomcxRI13mYV6NMnZiHEgeYvfrze1KTGV4R3uWYZIwVAbyDZnJweFUk3MfQiBHSIs3WTCclf4bBCJ8Bg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:58.888471Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.04820","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2d5821fd497b9ac71cdf58460d42d4af81c1444fbc12dee1dbf26603b115027b","sha256:4e80f4615f3037704b3d0c03b69de25540187a020949e611cc342709914e3d54"],"state_sha256":"1d88dbf8c29677530751454b55f51a7bb9880485f6631fdb9fa9100cbd3f85d5"}