{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:2GK2CCSQKXMY5VNKJTR5L7H2ZM","short_pith_number":"pith:2GK2CCSQ","canonical_record":{"source":{"id":"1111.5399","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-11-23T04:48:57Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.supr-con"],"title_canon_sha256":"d54d1208e4b5d095f7f79d6ca3b51b779120c6cc6737b0290b200fdcfafef8e6","abstract_canon_sha256":"ce0c605365d390d46e1c271b562b998f7d8f2dd0cfd130f7ccbebfa220a2dbbf"},"schema_version":"1.0"},"canonical_sha256":"d195a10a5055d98ed5aa4ce3d5fcfacb16ab4f7c27e8da002f5fed684827ae38","source":{"kind":"arxiv","id":"1111.5399","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.5399","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"arxiv_version","alias_value":"1111.5399v1","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.5399","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"pith_short_12","alias_value":"2GK2CCSQKXMY","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2GK2CCSQKXMY5VNK","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2GK2CCSQ","created_at":"2026-05-18T12:26:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:2GK2CCSQKXMY5VNKJTR5L7H2ZM","target":"record","payload":{"canonical_record":{"source":{"id":"1111.5399","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-11-23T04:48:57Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.supr-con"],"title_canon_sha256":"d54d1208e4b5d095f7f79d6ca3b51b779120c6cc6737b0290b200fdcfafef8e6","abstract_canon_sha256":"ce0c605365d390d46e1c271b562b998f7d8f2dd0cfd130f7ccbebfa220a2dbbf"},"schema_version":"1.0"},"canonical_sha256":"d195a10a5055d98ed5aa4ce3d5fcfacb16ab4f7c27e8da002f5fed684827ae38","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:07:52.105284Z","signature_b64":"cAZnWMwvojc4a55WizEfs0t57Im6wccpQ2i7p1QUNs2q4Gd1goKcKPVM70SWWjomORqGsFpz/lUWYKoJJUjbDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d195a10a5055d98ed5aa4ce3d5fcfacb16ab4f7c27e8da002f5fed684827ae38","last_reissued_at":"2026-05-18T04:07:52.104707Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:07:52.104707Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1111.5399","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:07:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V9LVFdbX/sWtVn/IMmhLzUuhVCSzjM85D7K7aYnrXbs7pE+Vt1nG0EqTnaoMC69VLc3Iq8ZSEnSVDP9yT0lQCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:03:55.920931Z"},"content_sha256":"b6b76fcbbdd3e595b6c2309887b575d3c909eba48cc2a011c3f5c76d3a275398","schema_version":"1.0","event_id":"sha256:b6b76fcbbdd3e595b6c2309887b575d3c909eba48cc2a011c3f5c76d3a275398"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:2GK2CCSQKXMY5VNKJTR5L7H2ZM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Coherent coupling of a superconducting flux-qubit to an electron spin ensemble in diamond","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","cond-mat.supr-con"],"primary_cat":"quant-ph","authors_text":"Alexander Kemp, Hayato Nakano, Kae Nemoto, Kosuke Kakuyanagi, Kouichi Semba, Makoto Kasu, Mark S. Everitt, Norikazu Mizuochi, Shin-ichi Karimoto, Shiro Saito, William J. Munro, Xiaobo Zhu, Yasuhiro Tokura","submitted_at":"2011-11-23T04:48:57Z","abstract_excerpt":"Electron-spin nitrogen-vacancy color centers in diamond are a natural candidate to act as a quantum memory for superconducting qubits because of their large collective coupling and long coherence times. We report here the first demonstration of strong coupling and coherent exchange of a single quantum of energy between a flux-qubit and an ensemble of nitrogen-vacancy color centers."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.5399","kind":"arxiv","version":1},"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":"2026-05-18T04:07:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jtcwE0iRSlx7Kw73UZ4ttsJJEHTFfPg8qxU/TGD6IFQq8KHN8BX9dzxEPOCQG/zhaiNVPBkEfsQ4kzs18t6wBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:03:55.922035Z"},"content_sha256":"fea1c05f8235b8b2e3a2c2968466c06cf50c0608f4839a1d529fe90cf6430fde","schema_version":"1.0","event_id":"sha256:fea1c05f8235b8b2e3a2c2968466c06cf50c0608f4839a1d529fe90cf6430fde"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2GK2CCSQKXMY5VNKJTR5L7H2ZM/bundle.json","state_url":"https://pith.science/pith/2GK2CCSQKXMY5VNKJTR5L7H2ZM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2GK2CCSQKXMY5VNKJTR5L7H2ZM/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":"2026-05-25T08:03:55Z","links":{"resolver":"https://pith.science/pith/2GK2CCSQKXMY5VNKJTR5L7H2ZM","bundle":"https://pith.science/pith/2GK2CCSQKXMY5VNKJTR5L7H2ZM/bundle.json","state":"https://pith.science/pith/2GK2CCSQKXMY5VNKJTR5L7H2ZM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2GK2CCSQKXMY5VNKJTR5L7H2ZM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:2GK2CCSQKXMY5VNKJTR5L7H2ZM","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":"ce0c605365d390d46e1c271b562b998f7d8f2dd0cfd130f7ccbebfa220a2dbbf","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-11-23T04:48:57Z","title_canon_sha256":"d54d1208e4b5d095f7f79d6ca3b51b779120c6cc6737b0290b200fdcfafef8e6"},"schema_version":"1.0","source":{"id":"1111.5399","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.5399","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"arxiv_version","alias_value":"1111.5399v1","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.5399","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"pith_short_12","alias_value":"2GK2CCSQKXMY","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2GK2CCSQKXMY5VNK","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2GK2CCSQ","created_at":"2026-05-18T12:26:18Z"}],"graph_snapshots":[{"event_id":"sha256:fea1c05f8235b8b2e3a2c2968466c06cf50c0608f4839a1d529fe90cf6430fde","target":"graph","created_at":"2026-05-18T04:07:52Z","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":"Electron-spin nitrogen-vacancy color centers in diamond are a natural candidate to act as a quantum memory for superconducting qubits because of their large collective coupling and long coherence times. We report here the first demonstration of strong coupling and coherent exchange of a single quantum of energy between a flux-qubit and an ensemble of nitrogen-vacancy color centers.","authors_text":"Alexander Kemp, Hayato Nakano, Kae Nemoto, Kosuke Kakuyanagi, Kouichi Semba, Makoto Kasu, Mark S. Everitt, Norikazu Mizuochi, Shin-ichi Karimoto, Shiro Saito, William J. Munro, Xiaobo Zhu, Yasuhiro Tokura","cross_cats":["cond-mat.mes-hall","cond-mat.supr-con"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-11-23T04:48:57Z","title":"Coherent coupling of a superconducting flux-qubit to an electron spin ensemble in diamond"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.5399","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:b6b76fcbbdd3e595b6c2309887b575d3c909eba48cc2a011c3f5c76d3a275398","target":"record","created_at":"2026-05-18T04:07:52Z","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":"ce0c605365d390d46e1c271b562b998f7d8f2dd0cfd130f7ccbebfa220a2dbbf","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-11-23T04:48:57Z","title_canon_sha256":"d54d1208e4b5d095f7f79d6ca3b51b779120c6cc6737b0290b200fdcfafef8e6"},"schema_version":"1.0","source":{"id":"1111.5399","kind":"arxiv","version":1}},"canonical_sha256":"d195a10a5055d98ed5aa4ce3d5fcfacb16ab4f7c27e8da002f5fed684827ae38","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d195a10a5055d98ed5aa4ce3d5fcfacb16ab4f7c27e8da002f5fed684827ae38","first_computed_at":"2026-05-18T04:07:52.104707Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:07:52.104707Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cAZnWMwvojc4a55WizEfs0t57Im6wccpQ2i7p1QUNs2q4Gd1goKcKPVM70SWWjomORqGsFpz/lUWYKoJJUjbDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:07:52.105284Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.5399","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b6b76fcbbdd3e595b6c2309887b575d3c909eba48cc2a011c3f5c76d3a275398","sha256:fea1c05f8235b8b2e3a2c2968466c06cf50c0608f4839a1d529fe90cf6430fde"],"state_sha256":"763da0e3199cded99287d0e36169c68897d818d62a6375245976ab09fdc090dd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Sb2iOinnGK57e+hJawfNxQbbflZsFTjGK9OdleDjvU3E4TvCeSJsrOni3Ax2nj511amLiy82cD5FNc7xCsHaAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T08:03:55.925391Z","bundle_sha256":"22c1c16bbd8cd674d7231926af46f68ffbd26df6d14fad57099ef1071bb13f72"}}