{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:XKI4IZX2LY7ZBV5CHVWVOFL4F3","short_pith_number":"pith:XKI4IZX2","canonical_record":{"source":{"id":"1306.1512","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-06-06T19:09:44Z","cross_cats_sorted":["cond-mat.str-el","quant-ph"],"title_canon_sha256":"33dc48cefdcf1b53b1a4301d48944f37259dde5986cdd4a6204820b791f21f7c","abstract_canon_sha256":"905ebffb90021f1a9b080e72e32cda42a7eb15f9c0f2acf622703257079c8364"},"schema_version":"1.0"},"canonical_sha256":"ba91c466fa5e3f90d7a23d6d57157c2ef739f3a481495e5dedcc08de08f04d89","source":{"kind":"arxiv","id":"1306.1512","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.1512","created_at":"2026-05-18T03:02:57Z"},{"alias_kind":"arxiv_version","alias_value":"1306.1512v3","created_at":"2026-05-18T03:02:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.1512","created_at":"2026-05-18T03:02:57Z"},{"alias_kind":"pith_short_12","alias_value":"XKI4IZX2LY7Z","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_16","alias_value":"XKI4IZX2LY7ZBV5C","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_8","alias_value":"XKI4IZX2","created_at":"2026-05-18T12:28:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:XKI4IZX2LY7ZBV5CHVWVOFL4F3","target":"record","payload":{"canonical_record":{"source":{"id":"1306.1512","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-06-06T19:09:44Z","cross_cats_sorted":["cond-mat.str-el","quant-ph"],"title_canon_sha256":"33dc48cefdcf1b53b1a4301d48944f37259dde5986cdd4a6204820b791f21f7c","abstract_canon_sha256":"905ebffb90021f1a9b080e72e32cda42a7eb15f9c0f2acf622703257079c8364"},"schema_version":"1.0"},"canonical_sha256":"ba91c466fa5e3f90d7a23d6d57157c2ef739f3a481495e5dedcc08de08f04d89","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:02:57.242820Z","signature_b64":"zWpjZZg6w5PcPeg/7PzrgoAdUK4tNHQywQCuynWLN+esk40q4k3NXp9IVAsFCqrrHZAWqsKSw/dqLPPmd1K9CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ba91c466fa5e3f90d7a23d6d57157c2ef739f3a481495e5dedcc08de08f04d89","last_reissued_at":"2026-05-18T03:02:57.242226Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:02:57.242226Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.1512","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:02:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dAv2Bqe3zQ+my/FtKRJzF47qgu1FKZB+OX8omSMmFIaMoof8oCxKM3ad7/v6VCyFznwP6vCbWv1uKsROTThWAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T18:01:44.097025Z"},"content_sha256":"2fef105df6b71c882c79603d179ef00c32823376bba68f0420c417c383cd00eb","schema_version":"1.0","event_id":"sha256:2fef105df6b71c882c79603d179ef00c32823376bba68f0420c417c383cd00eb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:XKI4IZX2LY7ZBV5CHVWVOFL4F3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evidence for temperature dependent spin-diffusion as a mechanism of intrinsic flux noise in SQUIDs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el","quant-ph"],"primary_cat":"cond-mat.supr-con","authors_text":"A.J. Berkley, C. Rich, M.H. Amin, Rogerio de Sousa, S.-F. Chen, S. LaForest, T. Lanting","submitted_at":"2013-06-06T19:09:44Z","abstract_excerpt":"The intrinsic flux noise observed in superconducting quantum interference devices (SQUIDs) is thought to be due to the fluctuation of electron spin impurities, but the frequency and temperature dependence observed in experiments do not agree with the usual 1/f models. We present theoretical calculations and experimental measurements of flux noise in rf-SQUID flux qubits that show how these observations, and previous reported measurements, can be interpreted in terms of a spin-diffusion constant that increases with temperature. We fit measurements of flux noise in sixteen devices, taken in the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.1512","kind":"arxiv","version":3},"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":"2026-05-18T03:02:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AY5w0I2WF7TTZnFVLYYRBPbM4twqWmPbzo+5JL8REk2Azkz6o25mSHIzjEF8or/3in/eNW1G3jZq4tQTfi/YAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T18:01:44.097727Z"},"content_sha256":"7e864d01eed5a3e41148c93df19e807674690c69af00febb3f7ca4ee3ae95017","schema_version":"1.0","event_id":"sha256:7e864d01eed5a3e41148c93df19e807674690c69af00febb3f7ca4ee3ae95017"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XKI4IZX2LY7ZBV5CHVWVOFL4F3/bundle.json","state_url":"https://pith.science/pith/XKI4IZX2LY7ZBV5CHVWVOFL4F3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XKI4IZX2LY7ZBV5CHVWVOFL4F3/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":"2026-05-30T18:01:44Z","links":{"resolver":"https://pith.science/pith/XKI4IZX2LY7ZBV5CHVWVOFL4F3","bundle":"https://pith.science/pith/XKI4IZX2LY7ZBV5CHVWVOFL4F3/bundle.json","state":"https://pith.science/pith/XKI4IZX2LY7ZBV5CHVWVOFL4F3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XKI4IZX2LY7ZBV5CHVWVOFL4F3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:XKI4IZX2LY7ZBV5CHVWVOFL4F3","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":"905ebffb90021f1a9b080e72e32cda42a7eb15f9c0f2acf622703257079c8364","cross_cats_sorted":["cond-mat.str-el","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-06-06T19:09:44Z","title_canon_sha256":"33dc48cefdcf1b53b1a4301d48944f37259dde5986cdd4a6204820b791f21f7c"},"schema_version":"1.0","source":{"id":"1306.1512","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.1512","created_at":"2026-05-18T03:02:57Z"},{"alias_kind":"arxiv_version","alias_value":"1306.1512v3","created_at":"2026-05-18T03:02:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.1512","created_at":"2026-05-18T03:02:57Z"},{"alias_kind":"pith_short_12","alias_value":"XKI4IZX2LY7Z","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_16","alias_value":"XKI4IZX2LY7ZBV5C","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_8","alias_value":"XKI4IZX2","created_at":"2026-05-18T12:28:06Z"}],"graph_snapshots":[{"event_id":"sha256:7e864d01eed5a3e41148c93df19e807674690c69af00febb3f7ca4ee3ae95017","target":"graph","created_at":"2026-05-18T03:02:57Z","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 intrinsic flux noise observed in superconducting quantum interference devices (SQUIDs) is thought to be due to the fluctuation of electron spin impurities, but the frequency and temperature dependence observed in experiments do not agree with the usual 1/f models. We present theoretical calculations and experimental measurements of flux noise in rf-SQUID flux qubits that show how these observations, and previous reported measurements, can be interpreted in terms of a spin-diffusion constant that increases with temperature. We fit measurements of flux noise in sixteen devices, taken in the ","authors_text":"A.J. Berkley, C. Rich, M.H. Amin, Rogerio de Sousa, S.-F. Chen, S. LaForest, T. Lanting","cross_cats":["cond-mat.str-el","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-06-06T19:09:44Z","title":"Evidence for temperature dependent spin-diffusion as a mechanism of intrinsic flux noise in SQUIDs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.1512","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":"sha256:2fef105df6b71c882c79603d179ef00c32823376bba68f0420c417c383cd00eb","target":"record","created_at":"2026-05-18T03:02:57Z","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":"905ebffb90021f1a9b080e72e32cda42a7eb15f9c0f2acf622703257079c8364","cross_cats_sorted":["cond-mat.str-el","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-06-06T19:09:44Z","title_canon_sha256":"33dc48cefdcf1b53b1a4301d48944f37259dde5986cdd4a6204820b791f21f7c"},"schema_version":"1.0","source":{"id":"1306.1512","kind":"arxiv","version":3}},"canonical_sha256":"ba91c466fa5e3f90d7a23d6d57157c2ef739f3a481495e5dedcc08de08f04d89","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ba91c466fa5e3f90d7a23d6d57157c2ef739f3a481495e5dedcc08de08f04d89","first_computed_at":"2026-05-18T03:02:57.242226Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:02:57.242226Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zWpjZZg6w5PcPeg/7PzrgoAdUK4tNHQywQCuynWLN+esk40q4k3NXp9IVAsFCqrrHZAWqsKSw/dqLPPmd1K9CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:02:57.242820Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.1512","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2fef105df6b71c882c79603d179ef00c32823376bba68f0420c417c383cd00eb","sha256:7e864d01eed5a3e41148c93df19e807674690c69af00febb3f7ca4ee3ae95017"],"state_sha256":"975a756f19028c691dc98f8f908df1fd1255f6b512790e9edd9a80b17dc47a76"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E+RURAuLvRde4bx4ATMGhK5YlgywTMfJck6tzQazcpyx75cZCOL2OlvjNHFIyQSO584/TY+Fg/S5fPpon91QCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T18:01:44.101604Z","bundle_sha256":"08f68cd81c93145958f0559e3a6d990762399952558e1b8a6bc63c277b259bac"}}