{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:6NSWDWWXBQLQE6NIY5EXIVSI7P","short_pith_number":"pith:6NSWDWWX","canonical_record":{"source":{"id":"1904.03627","kind":"arxiv","version":5},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-04-07T11:42:54Z","cross_cats_sorted":["math-ph","math.MP"],"title_canon_sha256":"a05f515f31e937d1bfcdfdb0aad0a813513667e8f486bfbd00cdea8f45ac4962","abstract_canon_sha256":"db2972b82ecc4b490b574adabcf6ebbc985b015a48d9302455935c402a770fd7"},"schema_version":"1.0"},"canonical_sha256":"f36561dad70c170279a8c749745648fbeced9970122055e919125cfa419bd202","source":{"kind":"arxiv","id":"1904.03627","version":5},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.03627","created_at":"2026-07-05T03:04:39Z"},{"alias_kind":"arxiv_version","alias_value":"1904.03627v5","created_at":"2026-07-05T03:04:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.03627","created_at":"2026-07-05T03:04:39Z"},{"alias_kind":"pith_short_12","alias_value":"6NSWDWWXBQLQ","created_at":"2026-07-05T03:04:39Z"},{"alias_kind":"pith_short_16","alias_value":"6NSWDWWXBQLQE6NI","created_at":"2026-07-05T03:04:39Z"},{"alias_kind":"pith_short_8","alias_value":"6NSWDWWX","created_at":"2026-07-05T03:04:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:6NSWDWWXBQLQE6NIY5EXIVSI7P","target":"record","payload":{"canonical_record":{"source":{"id":"1904.03627","kind":"arxiv","version":5},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-04-07T11:42:54Z","cross_cats_sorted":["math-ph","math.MP"],"title_canon_sha256":"a05f515f31e937d1bfcdfdb0aad0a813513667e8f486bfbd00cdea8f45ac4962","abstract_canon_sha256":"db2972b82ecc4b490b574adabcf6ebbc985b015a48d9302455935c402a770fd7"},"schema_version":"1.0"},"canonical_sha256":"f36561dad70c170279a8c749745648fbeced9970122055e919125cfa419bd202","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:04:39.206858Z","signature_b64":"/zHdjYDH7ioZtZplU0CSuGeOx9IpCH6jHEDE6Tpy0I+OmVlS0C/QxwTQLF56fBhaNqIYZxEkOGzCUmmoev43Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f36561dad70c170279a8c749745648fbeced9970122055e919125cfa419bd202","last_reissued_at":"2026-07-05T03:04:39.206432Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:04:39.206432Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.03627","source_version":5,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:04:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IG0ORr/c9yU9V+ZBLRyhfqpvdtY7KuXWpjznoQPhU5HArXHjsncV3L1zR33Vhbht5VQdzJCoIcxpF7oGjBXlAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T14:26:47.003775Z"},"content_sha256":"469de0acd3755be6dbf8a5c72c75e4038cb328ed3cc0d94dd4d0bdcdd839df78","schema_version":"1.0","event_id":"sha256:469de0acd3755be6dbf8a5c72c75e4038cb328ed3cc0d94dd4d0bdcdd839df78"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:6NSWDWWXBQLQE6NIY5EXIVSI7P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["math-ph","math.MP"],"primary_cat":"quant-ph","authors_text":"Daniel Burgarth, Martin Fraas, Paolo Facchi, Robin Hillier","submitted_at":"2019-04-07T11:42:54Z","abstract_excerpt":"Dynamical decoupling is the leading technique to remove unwanted interactions in a vast range of quantum systems through fast rotations. But what determines the time-scale of such rotations in order to achieve good decoupling? By providing an explicit counterexample of a qubit coupled to a charged particle and magnetic monopole, we show that such time-scales cannot be decided by the decay profile induced by the noise: even though the system shows a quadratic decay (a Zeno region revealing non-Markovian noise), it cannot be decoupled by periodic spin echo pulses, no matter how fast the rotation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.03627","kind":"arxiv","version":5},"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/1904.03627/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":"2026-07-05T03:04:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VO6UctRFbwMtCi9/qhobNUtfx1NjXLaxIpIIQDeAhJKq8XgmxKZrhRIZFfKARFs+vtCi7l6wZIwD7z9DgUjYDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T14:26:47.004274Z"},"content_sha256":"48f0ce078049e12983e859bcf0dd8b33b670345ea25bfb48381e7bfb39200fde","schema_version":"1.0","event_id":"sha256:48f0ce078049e12983e859bcf0dd8b33b670345ea25bfb48381e7bfb39200fde"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6NSWDWWXBQLQE6NIY5EXIVSI7P/bundle.json","state_url":"https://pith.science/pith/6NSWDWWXBQLQE6NIY5EXIVSI7P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6NSWDWWXBQLQE6NIY5EXIVSI7P/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":"2026-08-12T14:26:47Z","links":{"resolver":"https://pith.science/pith/6NSWDWWXBQLQE6NIY5EXIVSI7P","bundle":"https://pith.science/pith/6NSWDWWXBQLQE6NIY5EXIVSI7P/bundle.json","state":"https://pith.science/pith/6NSWDWWXBQLQE6NIY5EXIVSI7P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6NSWDWWXBQLQE6NIY5EXIVSI7P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:6NSWDWWXBQLQE6NIY5EXIVSI7P","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":"db2972b82ecc4b490b574adabcf6ebbc985b015a48d9302455935c402a770fd7","cross_cats_sorted":["math-ph","math.MP"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-04-07T11:42:54Z","title_canon_sha256":"a05f515f31e937d1bfcdfdb0aad0a813513667e8f486bfbd00cdea8f45ac4962"},"schema_version":"1.0","source":{"id":"1904.03627","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.03627","created_at":"2026-07-05T03:04:39Z"},{"alias_kind":"arxiv_version","alias_value":"1904.03627v5","created_at":"2026-07-05T03:04:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.03627","created_at":"2026-07-05T03:04:39Z"},{"alias_kind":"pith_short_12","alias_value":"6NSWDWWXBQLQ","created_at":"2026-07-05T03:04:39Z"},{"alias_kind":"pith_short_16","alias_value":"6NSWDWWXBQLQE6NI","created_at":"2026-07-05T03:04:39Z"},{"alias_kind":"pith_short_8","alias_value":"6NSWDWWX","created_at":"2026-07-05T03:04:39Z"}],"graph_snapshots":[{"event_id":"sha256:48f0ce078049e12983e859bcf0dd8b33b670345ea25bfb48381e7bfb39200fde","target":"graph","created_at":"2026-07-05T03:04:39Z","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/1904.03627/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Dynamical decoupling is the leading technique to remove unwanted interactions in a vast range of quantum systems through fast rotations. But what determines the time-scale of such rotations in order to achieve good decoupling? By providing an explicit counterexample of a qubit coupled to a charged particle and magnetic monopole, we show that such time-scales cannot be decided by the decay profile induced by the noise: even though the system shows a quadratic decay (a Zeno region revealing non-Markovian noise), it cannot be decoupled by periodic spin echo pulses, no matter how fast the rotation","authors_text":"Daniel Burgarth, Martin Fraas, Paolo Facchi, Robin Hillier","cross_cats":["math-ph","math.MP"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-04-07T11:42:54Z","title":"Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.03627","kind":"arxiv","version":5},"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":"sha256:469de0acd3755be6dbf8a5c72c75e4038cb328ed3cc0d94dd4d0bdcdd839df78","target":"record","created_at":"2026-07-05T03:04:39Z","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":"db2972b82ecc4b490b574adabcf6ebbc985b015a48d9302455935c402a770fd7","cross_cats_sorted":["math-ph","math.MP"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-04-07T11:42:54Z","title_canon_sha256":"a05f515f31e937d1bfcdfdb0aad0a813513667e8f486bfbd00cdea8f45ac4962"},"schema_version":"1.0","source":{"id":"1904.03627","kind":"arxiv","version":5}},"canonical_sha256":"f36561dad70c170279a8c749745648fbeced9970122055e919125cfa419bd202","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f36561dad70c170279a8c749745648fbeced9970122055e919125cfa419bd202","first_computed_at":"2026-07-05T03:04:39.206432Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:04:39.206432Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/zHdjYDH7ioZtZplU0CSuGeOx9IpCH6jHEDE6Tpy0I+OmVlS0C/QxwTQLF56fBhaNqIYZxEkOGzCUmmoev43Ag==","signature_status":"signed_v1","signed_at":"2026-07-05T03:04:39.206858Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.03627","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:469de0acd3755be6dbf8a5c72c75e4038cb328ed3cc0d94dd4d0bdcdd839df78","sha256:48f0ce078049e12983e859bcf0dd8b33b670345ea25bfb48381e7bfb39200fde"],"state_sha256":"ac67fab264d664bcc40e381892f2eaf3f5aa71d159c1f2e0acf94cd5fcae40b5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Y85dAShQDxSamBpr8+zouuLED+y8r6c8q/GLAQWvVABYv/IAZ9Icwi8rcPdyFSEyD7hUjG9y0jIsvZZdvoOBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T14:26:47.009105Z","bundle_sha256":"8089e6f40f0b2cd81dd41a15152f0954fc2f4359d8c076edbe0cbacf5d7ad808"}}