{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:MP4J2JXHTHRXSXHWJTHRHEQAEE","short_pith_number":"pith:MP4J2JXH","canonical_record":{"source":{"id":"0803.1982","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-03-13T14:51:53Z","cross_cats_sorted":[],"title_canon_sha256":"02b5bf02fc7806e810e0dfe6b171e8a1a648bf58186bf9542c48c9bd02b2c87f","abstract_canon_sha256":"eb953f831e3e779872a03643edc3a31186afdd78ad74e0bba9272a32ddc7c354"},"schema_version":"1.0"},"canonical_sha256":"63f89d26e799e3795cf64ccf13920021351c4dfc744859814f1d0a323ca19e0c","source":{"kind":"arxiv","id":"0803.1982","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0803.1982","created_at":"2026-07-04T17:09:49Z"},{"alias_kind":"arxiv_version","alias_value":"0803.1982v1","created_at":"2026-07-04T17:09:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0803.1982","created_at":"2026-07-04T17:09:49Z"},{"alias_kind":"pith_short_12","alias_value":"MP4J2JXHTHRX","created_at":"2026-07-04T17:09:49Z"},{"alias_kind":"pith_short_16","alias_value":"MP4J2JXHTHRXSXHW","created_at":"2026-07-04T17:09:49Z"},{"alias_kind":"pith_short_8","alias_value":"MP4J2JXH","created_at":"2026-07-04T17:09:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:MP4J2JXHTHRXSXHWJTHRHEQAEE","target":"record","payload":{"canonical_record":{"source":{"id":"0803.1982","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-03-13T14:51:53Z","cross_cats_sorted":[],"title_canon_sha256":"02b5bf02fc7806e810e0dfe6b171e8a1a648bf58186bf9542c48c9bd02b2c87f","abstract_canon_sha256":"eb953f831e3e779872a03643edc3a31186afdd78ad74e0bba9272a32ddc7c354"},"schema_version":"1.0"},"canonical_sha256":"63f89d26e799e3795cf64ccf13920021351c4dfc744859814f1d0a323ca19e0c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:09:49.976746Z","signature_b64":"J6uBcIHUfUQIXCvBg/m44OafJkq9XCWisUywi4lI8rPIkdNA87ITXxoMxbn6MXqA/3wH8k/uRD2ypUkhV9EtBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"63f89d26e799e3795cf64ccf13920021351c4dfc744859814f1d0a323ca19e0c","last_reissued_at":"2026-07-04T17:09:49.976340Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:09:49.976340Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0803.1982","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":"2026-07-04T17:09:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HQ+ONxsSLCpvDjVTCAMVd8G2lzy1pOMWd2vgFG1ugnPMsskL7W7UryKf81NBnFTNSr2fECeMUW4vaSePY294CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T01:08:27.796793Z"},"content_sha256":"43bcf47d39ab9aeccae419be5dc0c97105d2b3ec336ffc69862e77be57db878c","schema_version":"1.0","event_id":"sha256:43bcf47d39ab9aeccae419be5dc0c97105d2b3ec336ffc69862e77be57db878c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:MP4J2JXHTHRXSXHWJTHRHEQAEE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Liquid State NMR as a Test-bed for Developing Quantum Control Methods","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"C.A. Ryan, C. Negrevergne, E. Knill, M. Laforest, R. Laflamme","submitted_at":"2008-03-13T14:51:53Z","abstract_excerpt":"In building a quantum information processor (QIP), the challenge is to coherently control a large quantum system well enough to perform an arbitrary quantum algorithm and to be able to correct errors induced by decoherence. Nuclear magnetic resonance (NMR) QIPs offer an excellent test-bed on which to develop and benchmark tools and techniques to control quantum systems. Two main issues to consider when designing control methods are accuracy and efficiency, for which two complementary approaches have been developed so far to control qubit registers with liquid-state NMR methods. The first appli"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0803.1982","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0803.1982/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T17:09:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Py59CrJgzrX56gTH4b6/iaUoK0z3M4yYGtpbzw5qkHF+8bvJtNfEWZ5L9coSto/Nyv2XgAXeoIff3XzeUQxSDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T01:08:27.797978Z"},"content_sha256":"fa39393791dc80cc5bcb5ee8ec6e3ee672d8e531a4c54ebc004b022404a487b3","schema_version":"1.0","event_id":"sha256:fa39393791dc80cc5bcb5ee8ec6e3ee672d8e531a4c54ebc004b022404a487b3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MP4J2JXHTHRXSXHWJTHRHEQAEE/bundle.json","state_url":"https://pith.science/pith/MP4J2JXHTHRXSXHWJTHRHEQAEE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MP4J2JXHTHRXSXHWJTHRHEQAEE/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":"2026-08-11T01:08:27Z","links":{"resolver":"https://pith.science/pith/MP4J2JXHTHRXSXHWJTHRHEQAEE","bundle":"https://pith.science/pith/MP4J2JXHTHRXSXHWJTHRHEQAEE/bundle.json","state":"https://pith.science/pith/MP4J2JXHTHRXSXHWJTHRHEQAEE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MP4J2JXHTHRXSXHWJTHRHEQAEE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:MP4J2JXHTHRXSXHWJTHRHEQAEE","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":"eb953f831e3e779872a03643edc3a31186afdd78ad74e0bba9272a32ddc7c354","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-03-13T14:51:53Z","title_canon_sha256":"02b5bf02fc7806e810e0dfe6b171e8a1a648bf58186bf9542c48c9bd02b2c87f"},"schema_version":"1.0","source":{"id":"0803.1982","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0803.1982","created_at":"2026-07-04T17:09:49Z"},{"alias_kind":"arxiv_version","alias_value":"0803.1982v1","created_at":"2026-07-04T17:09:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0803.1982","created_at":"2026-07-04T17:09:49Z"},{"alias_kind":"pith_short_12","alias_value":"MP4J2JXHTHRX","created_at":"2026-07-04T17:09:49Z"},{"alias_kind":"pith_short_16","alias_value":"MP4J2JXHTHRXSXHW","created_at":"2026-07-04T17:09:49Z"},{"alias_kind":"pith_short_8","alias_value":"MP4J2JXH","created_at":"2026-07-04T17:09:49Z"}],"graph_snapshots":[{"event_id":"sha256:fa39393791dc80cc5bcb5ee8ec6e3ee672d8e531a4c54ebc004b022404a487b3","target":"graph","created_at":"2026-07-04T17:09:49Z","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/0803.1982/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In building a quantum information processor (QIP), the challenge is to coherently control a large quantum system well enough to perform an arbitrary quantum algorithm and to be able to correct errors induced by decoherence. Nuclear magnetic resonance (NMR) QIPs offer an excellent test-bed on which to develop and benchmark tools and techniques to control quantum systems. Two main issues to consider when designing control methods are accuracy and efficiency, for which two complementary approaches have been developed so far to control qubit registers with liquid-state NMR methods. The first appli","authors_text":"C.A. Ryan, C. Negrevergne, E. Knill, M. Laforest, R. Laflamme","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-03-13T14:51:53Z","title":"Liquid State NMR as a Test-bed for Developing Quantum Control Methods"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0803.1982","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":"sha256:43bcf47d39ab9aeccae419be5dc0c97105d2b3ec336ffc69862e77be57db878c","target":"record","created_at":"2026-07-04T17:09:49Z","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":"eb953f831e3e779872a03643edc3a31186afdd78ad74e0bba9272a32ddc7c354","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-03-13T14:51:53Z","title_canon_sha256":"02b5bf02fc7806e810e0dfe6b171e8a1a648bf58186bf9542c48c9bd02b2c87f"},"schema_version":"1.0","source":{"id":"0803.1982","kind":"arxiv","version":1}},"canonical_sha256":"63f89d26e799e3795cf64ccf13920021351c4dfc744859814f1d0a323ca19e0c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"63f89d26e799e3795cf64ccf13920021351c4dfc744859814f1d0a323ca19e0c","first_computed_at":"2026-07-04T17:09:49.976340Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:09:49.976340Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"J6uBcIHUfUQIXCvBg/m44OafJkq9XCWisUywi4lI8rPIkdNA87ITXxoMxbn6MXqA/3wH8k/uRD2ypUkhV9EtBg==","signature_status":"signed_v1","signed_at":"2026-07-04T17:09:49.976746Z","signed_message":"canonical_sha256_bytes"},"source_id":"0803.1982","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:43bcf47d39ab9aeccae419be5dc0c97105d2b3ec336ffc69862e77be57db878c","sha256:fa39393791dc80cc5bcb5ee8ec6e3ee672d8e531a4c54ebc004b022404a487b3"],"state_sha256":"edbc7161edee8a8741c4eb01b2e55dbd0151363f4fe709c064af2178470cf89b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9miUS3r2yKGojlCghzLDx7WMV2XzHs+Jcf9vTLSfhH0Ov4VyvasWR55gptaGET7x0fl6073vp1zPGz8aojknDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T01:08:27.802646Z","bundle_sha256":"7c069fcf175187387a1dc037e76dca115c30dce8b56a8dcfb6bc078968d055b9"}}