{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:YKGEYOXCBT25S5TJGAHLRYDBQH","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":"8d91998736de55d58dfd3cf335eafeabf51fdbab99dd034d6708afcd40ea4dd3","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-11-14T15:33:37Z","title_canon_sha256":"d34e23b98f64e1ab8dea879eed6615f8f271e045fcf0f99b6f39b550b1a02715"},"schema_version":"1.0","source":{"id":"1311.3540","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.3540","created_at":"2026-05-18T03:03:20Z"},{"alias_kind":"arxiv_version","alias_value":"1311.3540v2","created_at":"2026-05-18T03:03:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.3540","created_at":"2026-05-18T03:03:20Z"},{"alias_kind":"pith_short_12","alias_value":"YKGEYOXCBT25","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_16","alias_value":"YKGEYOXCBT25S5TJ","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_8","alias_value":"YKGEYOXC","created_at":"2026-05-18T12:28:06Z"}],"graph_snapshots":[{"event_id":"sha256:dede062487c19287c535fc3dacb0a786fc9c134b08549750dd26807841f03d77","target":"graph","created_at":"2026-05-18T03:03:20Z","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 measure the excitation spectrum of a superconducting atomic contact. In addition to the usual continuum above the superconducting gap, the single particle excitation spectrum contains discrete, spin-degenerate Andreev levels inside the gap. Quasiparticle excitations are induced by a broadband on-chip microwave source and detected by measuring changes in the supercurrent flowing through the atomic contact. Since microwave photons excite quasiparticles in pairs, two types of transitions are observed: Andreev transitions, which consists of putting two quasiparticles in an Andreev level, and tr","authors_text":"CEA-Saclay, C. O. Girit, C. Urbina, D. Esteve, France), H. Pothier (Quantronics Group, L. Bretheau, SPEC","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-11-14T15:33:37Z","title":"Supercurrent Spectroscopy of Andreev States"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.3540","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:ae1402541b1d18ccb9864333db1741642c005a3f6431c899d70e751dd452672a","target":"record","created_at":"2026-05-18T03:03:20Z","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":"8d91998736de55d58dfd3cf335eafeabf51fdbab99dd034d6708afcd40ea4dd3","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-11-14T15:33:37Z","title_canon_sha256":"d34e23b98f64e1ab8dea879eed6615f8f271e045fcf0f99b6f39b550b1a02715"},"schema_version":"1.0","source":{"id":"1311.3540","kind":"arxiv","version":2}},"canonical_sha256":"c28c4c3ae20cf5d97669300eb8e06181c4fd40ec9cadab199ed184cc98a2f46e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c28c4c3ae20cf5d97669300eb8e06181c4fd40ec9cadab199ed184cc98a2f46e","first_computed_at":"2026-05-18T03:03:20.379541Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:03:20.379541Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"a8bH4IZyLEmzFN1ozS0NIO3axAT4nt5u/G6E4/SQ4Zbg03xg3ib+FIO3lFbFxtQdsN1Iice/8e5D8bz0TBIjBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:03:20.380181Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.3540","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ae1402541b1d18ccb9864333db1741642c005a3f6431c899d70e751dd452672a","sha256:dede062487c19287c535fc3dacb0a786fc9c134b08549750dd26807841f03d77"],"state_sha256":"55289ec15632b5f88dfc379f0d0d275fdbaa3c9265831e8493e9088d270a46c8"}