{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:W2IBTDY3F53NSPVP7FSD36DK2B","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":"79ff33bfe623827d12ea09a3a6c45bb704347bbd64772b8f0ffd6ed6d1f43550","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2024-01-26T01:57:05Z","title_canon_sha256":"76d33fc0c851c9e25fab27525374b152f06ba1b513b877e3d47bf3a6c44bf163"},"schema_version":"1.0","source":{"id":"2401.14597","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2401.14597","created_at":"2026-07-05T09:21:02Z"},{"alias_kind":"arxiv_version","alias_value":"2401.14597v3","created_at":"2026-07-05T09:21:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2401.14597","created_at":"2026-07-05T09:21:02Z"},{"alias_kind":"pith_short_12","alias_value":"W2IBTDY3F53N","created_at":"2026-07-05T09:21:02Z"},{"alias_kind":"pith_short_16","alias_value":"W2IBTDY3F53NSPVP","created_at":"2026-07-05T09:21:02Z"},{"alias_kind":"pith_short_8","alias_value":"W2IBTDY3","created_at":"2026-07-05T09:21:02Z"}],"graph_snapshots":[{"event_id":"sha256:3910c88184610392de55d13e6e5fe1e1c76c193e91770ad7dff2b096a0e6ed62","target":"graph","created_at":"2026-07-05T09:21:02Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2401.14597/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Conventional superconducting flux qubits require the application of a precisely tuned magnetic field to set the operation point at half a flux quantum through the qubit loop, which complicates the on-chip integration of this type of device. It has been proposed that by inducing a $\\pi$-phase shift in the superconducting order parameter using a precisely controlled nanoscale-thickness superconductor/ferromagnet/superconductor Josephson junction, commonly referred to as $\\pi$-junction, it is possible to realize a flux qubit operating at zero magnetic flux. Here, we report the realization of a ze","authors_text":"Duong Pham, Hirotaka Terai, Kouichi Semba, Leonid V. Abdurakhimov, Sahel Ashhab, Shiro Saito, Sunmi Kim, Taro Yamashita, Wei Qiu","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2024-01-26T01:57:05Z","title":"Superconducting flux qubit with ferromagnetic Josephson $\\pi$-junction operating at zero magnetic field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2401.14597","kind":"arxiv","version":3},"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":"sha256:6f5fdf51515f16f57cd3ea8ad3c4a88885b537d647a1b1f703776f4a27c1ab90","target":"record","created_at":"2026-07-05T09:21:02Z","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":"79ff33bfe623827d12ea09a3a6c45bb704347bbd64772b8f0ffd6ed6d1f43550","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2024-01-26T01:57:05Z","title_canon_sha256":"76d33fc0c851c9e25fab27525374b152f06ba1b513b877e3d47bf3a6c44bf163"},"schema_version":"1.0","source":{"id":"2401.14597","kind":"arxiv","version":3}},"canonical_sha256":"b690198f1b2f76d93eaff9643df86ad04ae4b91f34e0994ca1171a8db1d807d4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b690198f1b2f76d93eaff9643df86ad04ae4b91f34e0994ca1171a8db1d807d4","first_computed_at":"2026-07-05T09:21:02.346892Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:21:02.346892Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dYgZkvsXRPhWYcf2eoWJNGPpV3fA109roHUN3K+nnW+dicg0nx9CXu831o3I9gtWhFOYNEPNn5ePxfXnPy6BDA==","signature_status":"signed_v1","signed_at":"2026-07-05T09:21:02.347409Z","signed_message":"canonical_sha256_bytes"},"source_id":"2401.14597","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6f5fdf51515f16f57cd3ea8ad3c4a88885b537d647a1b1f703776f4a27c1ab90","sha256:3910c88184610392de55d13e6e5fe1e1c76c193e91770ad7dff2b096a0e6ed62"],"state_sha256":"660f8c59a01ad98c5efc752f0eb8907e8c713e15fd12cd5f34b47a4b0c26a349"}