{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:YIPQUXUMLF5I2XZOAIGXMDTFRS","short_pith_number":"pith:YIPQUXUM","canonical_record":{"source":{"id":"1202.0346","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-02-02T03:25:51Z","cross_cats_sorted":[],"title_canon_sha256":"1a32cf69f27d6071436ed5da4255d2f99cbc874836f4dc66fbd37a945c1fcd61","abstract_canon_sha256":"bcb3195173b7daf9137b567bcfef35af3232f6a382b5f74421e33eaf99735d31"},"schema_version":"1.0"},"canonical_sha256":"c21f0a5e8c597a8d5f2e020d760e658cb79442a2cb5014282721e6f6c0b56762","source":{"kind":"arxiv","id":"1202.0346","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.0346","created_at":"2026-05-18T04:03:18Z"},{"alias_kind":"arxiv_version","alias_value":"1202.0346v1","created_at":"2026-05-18T04:03:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.0346","created_at":"2026-05-18T04:03:18Z"},{"alias_kind":"pith_short_12","alias_value":"YIPQUXUMLF5I","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"YIPQUXUMLF5I2XZO","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"YIPQUXUM","created_at":"2026-05-18T12:27:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:YIPQUXUMLF5I2XZOAIGXMDTFRS","target":"record","payload":{"canonical_record":{"source":{"id":"1202.0346","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-02-02T03:25:51Z","cross_cats_sorted":[],"title_canon_sha256":"1a32cf69f27d6071436ed5da4255d2f99cbc874836f4dc66fbd37a945c1fcd61","abstract_canon_sha256":"bcb3195173b7daf9137b567bcfef35af3232f6a382b5f74421e33eaf99735d31"},"schema_version":"1.0"},"canonical_sha256":"c21f0a5e8c597a8d5f2e020d760e658cb79442a2cb5014282721e6f6c0b56762","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:03:18.628902Z","signature_b64":"uOeKoqi0ox/2GK6gRKynXm6SSzBjLIDUIkZcaNX0wJQopssqQCIkI5or6aWtigaMQVRylzAXv5H6sElJ3tsbDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c21f0a5e8c597a8d5f2e020d760e658cb79442a2cb5014282721e6f6c0b56762","last_reissued_at":"2026-05-18T04:03:18.628198Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:03:18.628198Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.0346","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":"2026-05-18T04:03:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8yicQ0OWxvmkTaRlwaAS1YCmTULL7V91sgU0Otzwe49YwdCjpsUUsNEWMRRwaxlMSHGSV128R61uJBXmACrpCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:25:59.329586Z"},"content_sha256":"1d696a9f30cf85a9a40c920f4de589533532d09dd1336e8d61353d074935751f","schema_version":"1.0","event_id":"sha256:1d696a9f30cf85a9a40c920f4de589533532d09dd1336e8d61353d074935751f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:YIPQUXUMLF5I2XZOAIGXMDTFRS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Schmidt-number benchmark for genuine quantum memories and gates","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Ryo Namiki, Yuuki Tokunaga","submitted_at":"2012-02-02T03:25:51Z","abstract_excerpt":"We propose to apply the notion of the Schmidt number in order to show that a quantum memory or gate process is capable of maintaining a genuine multi-level quantum coherence. We present a simple criterion in terms of an average gate fidelity with respect to the input states of two mutually unbiased bases and demonstrate the coherence of the gate operation in several existing experiments. The Schmidt-number benchmark naturally includes the quantum benchmark as a specific case."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.0346","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":"2026-05-18T04:03:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lfBojmfQBSuv2zUa0i6+Le+07ZtAlCoBntH9zIN6YyPbF0eTCeXWknFC3tf1NQgyyNFFCOIlWqG7YmVYZ5vbAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:25:59.330234Z"},"content_sha256":"5830af81f4b7472f6571c4f094322bfe4c2ab03be5cf55ebb9db76225dac105e","schema_version":"1.0","event_id":"sha256:5830af81f4b7472f6571c4f094322bfe4c2ab03be5cf55ebb9db76225dac105e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YIPQUXUMLF5I2XZOAIGXMDTFRS/bundle.json","state_url":"https://pith.science/pith/YIPQUXUMLF5I2XZOAIGXMDTFRS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YIPQUXUMLF5I2XZOAIGXMDTFRS/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":"2026-05-28T18:25:59Z","links":{"resolver":"https://pith.science/pith/YIPQUXUMLF5I2XZOAIGXMDTFRS","bundle":"https://pith.science/pith/YIPQUXUMLF5I2XZOAIGXMDTFRS/bundle.json","state":"https://pith.science/pith/YIPQUXUMLF5I2XZOAIGXMDTFRS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YIPQUXUMLF5I2XZOAIGXMDTFRS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:YIPQUXUMLF5I2XZOAIGXMDTFRS","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":"bcb3195173b7daf9137b567bcfef35af3232f6a382b5f74421e33eaf99735d31","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-02-02T03:25:51Z","title_canon_sha256":"1a32cf69f27d6071436ed5da4255d2f99cbc874836f4dc66fbd37a945c1fcd61"},"schema_version":"1.0","source":{"id":"1202.0346","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.0346","created_at":"2026-05-18T04:03:18Z"},{"alias_kind":"arxiv_version","alias_value":"1202.0346v1","created_at":"2026-05-18T04:03:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.0346","created_at":"2026-05-18T04:03:18Z"},{"alias_kind":"pith_short_12","alias_value":"YIPQUXUMLF5I","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"YIPQUXUMLF5I2XZO","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"YIPQUXUM","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:5830af81f4b7472f6571c4f094322bfe4c2ab03be5cf55ebb9db76225dac105e","target":"graph","created_at":"2026-05-18T04:03:18Z","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 propose to apply the notion of the Schmidt number in order to show that a quantum memory or gate process is capable of maintaining a genuine multi-level quantum coherence. We present a simple criterion in terms of an average gate fidelity with respect to the input states of two mutually unbiased bases and demonstrate the coherence of the gate operation in several existing experiments. The Schmidt-number benchmark naturally includes the quantum benchmark as a specific case.","authors_text":"Ryo Namiki, Yuuki Tokunaga","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-02-02T03:25:51Z","title":"Schmidt-number benchmark for genuine quantum memories and gates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.0346","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":"sha256:1d696a9f30cf85a9a40c920f4de589533532d09dd1336e8d61353d074935751f","target":"record","created_at":"2026-05-18T04:03:18Z","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":"bcb3195173b7daf9137b567bcfef35af3232f6a382b5f74421e33eaf99735d31","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-02-02T03:25:51Z","title_canon_sha256":"1a32cf69f27d6071436ed5da4255d2f99cbc874836f4dc66fbd37a945c1fcd61"},"schema_version":"1.0","source":{"id":"1202.0346","kind":"arxiv","version":1}},"canonical_sha256":"c21f0a5e8c597a8d5f2e020d760e658cb79442a2cb5014282721e6f6c0b56762","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c21f0a5e8c597a8d5f2e020d760e658cb79442a2cb5014282721e6f6c0b56762","first_computed_at":"2026-05-18T04:03:18.628198Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:03:18.628198Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uOeKoqi0ox/2GK6gRKynXm6SSzBjLIDUIkZcaNX0wJQopssqQCIkI5or6aWtigaMQVRylzAXv5H6sElJ3tsbDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:03:18.628902Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.0346","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1d696a9f30cf85a9a40c920f4de589533532d09dd1336e8d61353d074935751f","sha256:5830af81f4b7472f6571c4f094322bfe4c2ab03be5cf55ebb9db76225dac105e"],"state_sha256":"1e2718b058ab4bbd9153abf4aa20ed34b4b8994e4a11d4f7d7f34e017b80de72"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OI91T3cHCoDf6gvAZTI6yWyc2pGiwq1EmuZd5AY8Gjjz/O2qK0tq6AwUgTDfpTNZLtkPWYXK+G1JoK5itaiZAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T18:25:59.333959Z","bundle_sha256":"d2198c5aeb6651f0386bbadcdc42a45f8102b51afd51c2e595074f5a894e833e"}}