{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:RB44CYQQ4G2ZKGF6IYTGO6V335","short_pith_number":"pith:RB44CYQQ","canonical_record":{"source":{"id":"1512.03652","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-12-11T14:19:41Z","cross_cats_sorted":[],"title_canon_sha256":"8a1c9e6d50c7df7e9f97537524aac39f1bcb79fc66f3698182c180ea9c43f84a","abstract_canon_sha256":"bafb7b16fb4aca9bd9ad2186215313c2e74627cef3853f07b436dce6562c4e2d"},"schema_version":"1.0"},"canonical_sha256":"8879c16210e1b59518be4626677abbdf6bd9bd272d5ea2d3aa173daff8f47e49","source":{"kind":"arxiv","id":"1512.03652","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03652","created_at":"2026-05-18T01:11:50Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03652v3","created_at":"2026-05-18T01:11:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03652","created_at":"2026-05-18T01:11:50Z"},{"alias_kind":"pith_short_12","alias_value":"RB44CYQQ4G2Z","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RB44CYQQ4G2ZKGF6","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RB44CYQQ","created_at":"2026-05-18T12:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:RB44CYQQ4G2ZKGF6IYTGO6V335","target":"record","payload":{"canonical_record":{"source":{"id":"1512.03652","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-12-11T14:19:41Z","cross_cats_sorted":[],"title_canon_sha256":"8a1c9e6d50c7df7e9f97537524aac39f1bcb79fc66f3698182c180ea9c43f84a","abstract_canon_sha256":"bafb7b16fb4aca9bd9ad2186215313c2e74627cef3853f07b436dce6562c4e2d"},"schema_version":"1.0"},"canonical_sha256":"8879c16210e1b59518be4626677abbdf6bd9bd272d5ea2d3aa173daff8f47e49","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:50.049380Z","signature_b64":"RKxXvdLfUjKrMP96jvOr3lfdtpln8o+1MAl3nlxPqw1fKVA+7w0jWx9xyKCxK3KKfE/ixWHjrcSZMQiA5z0lCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8879c16210e1b59518be4626677abbdf6bd9bd272d5ea2d3aa173daff8f47e49","last_reissued_at":"2026-05-18T01:11:50.049037Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:50.049037Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.03652","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":"2026-05-18T01:11:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e6qm5OtW6wHI919LA5zvtiTqNvMQeDLsZwGEdBjWsvlIhUL7eBQPUuD5bQlFTj12yG9Vh2Bp2bpURL83xGx9Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:56:22.735400Z"},"content_sha256":"6c8b93864eb30c66d2922472628ecd7de1d43ee0e0736dafa358c06bba4f2bff","schema_version":"1.0","event_id":"sha256:6c8b93864eb30c66d2922472628ecd7de1d43ee0e0736dafa358c06bba4f2bff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:RB44CYQQ4G2ZKGF6IYTGO6V335","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct state reconstruction with coupling-deformed pointer observables","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Shengjun Wu, Xuanmin Zhu, Yu-Xiang Zhang","submitted_at":"2015-12-11T14:19:41Z","abstract_excerpt":"Direct state tomography (DST) using weak measurements has received wide attention. Based on the concept of coupling-deformed pointer observables presented by Zhang \\emph{et al}.[Phys. Rev. A \\textbf{93}, 032128 (2016)], a modified direct state tomography (MDST) is proposed, examined, and compared with other typical state tomography schemes. MDST has exact validity for measurements of any strength. We identify the strength needed to attain the highest efficiency level of MDST by using statistical theory. MDST is much more efficient than DST in the sense that far fewer samples are needed to reac"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03652","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":"2026-05-18T01:11:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4/MjF3y6y4YPlwMpfb94Kwl9dpLK0ygQnmWL2Z4CZYBtlyKrybpmr5DIE9+pqfbgVEG5smkRuiWifeMctidNDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:56:22.736061Z"},"content_sha256":"0c7bae6abcda1f29139c8a3c54d77336b02764790981ed2aead567c54f885ed4","schema_version":"1.0","event_id":"sha256:0c7bae6abcda1f29139c8a3c54d77336b02764790981ed2aead567c54f885ed4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RB44CYQQ4G2ZKGF6IYTGO6V335/bundle.json","state_url":"https://pith.science/pith/RB44CYQQ4G2ZKGF6IYTGO6V335/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RB44CYQQ4G2ZKGF6IYTGO6V335/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":"2026-05-26T21:56:22Z","links":{"resolver":"https://pith.science/pith/RB44CYQQ4G2ZKGF6IYTGO6V335","bundle":"https://pith.science/pith/RB44CYQQ4G2ZKGF6IYTGO6V335/bundle.json","state":"https://pith.science/pith/RB44CYQQ4G2ZKGF6IYTGO6V335/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RB44CYQQ4G2ZKGF6IYTGO6V335/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:RB44CYQQ4G2ZKGF6IYTGO6V335","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":"bafb7b16fb4aca9bd9ad2186215313c2e74627cef3853f07b436dce6562c4e2d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-12-11T14:19:41Z","title_canon_sha256":"8a1c9e6d50c7df7e9f97537524aac39f1bcb79fc66f3698182c180ea9c43f84a"},"schema_version":"1.0","source":{"id":"1512.03652","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03652","created_at":"2026-05-18T01:11:50Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03652v3","created_at":"2026-05-18T01:11:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03652","created_at":"2026-05-18T01:11:50Z"},{"alias_kind":"pith_short_12","alias_value":"RB44CYQQ4G2Z","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RB44CYQQ4G2ZKGF6","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RB44CYQQ","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:0c7bae6abcda1f29139c8a3c54d77336b02764790981ed2aead567c54f885ed4","target":"graph","created_at":"2026-05-18T01:11:50Z","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":"Direct state tomography (DST) using weak measurements has received wide attention. Based on the concept of coupling-deformed pointer observables presented by Zhang \\emph{et al}.[Phys. Rev. A \\textbf{93}, 032128 (2016)], a modified direct state tomography (MDST) is proposed, examined, and compared with other typical state tomography schemes. MDST has exact validity for measurements of any strength. We identify the strength needed to attain the highest efficiency level of MDST by using statistical theory. MDST is much more efficient than DST in the sense that far fewer samples are needed to reac","authors_text":"Shengjun Wu, Xuanmin Zhu, Yu-Xiang Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-12-11T14:19:41Z","title":"Direct state reconstruction with coupling-deformed pointer observables"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03652","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":"sha256:6c8b93864eb30c66d2922472628ecd7de1d43ee0e0736dafa358c06bba4f2bff","target":"record","created_at":"2026-05-18T01:11:50Z","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":"bafb7b16fb4aca9bd9ad2186215313c2e74627cef3853f07b436dce6562c4e2d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-12-11T14:19:41Z","title_canon_sha256":"8a1c9e6d50c7df7e9f97537524aac39f1bcb79fc66f3698182c180ea9c43f84a"},"schema_version":"1.0","source":{"id":"1512.03652","kind":"arxiv","version":3}},"canonical_sha256":"8879c16210e1b59518be4626677abbdf6bd9bd272d5ea2d3aa173daff8f47e49","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8879c16210e1b59518be4626677abbdf6bd9bd272d5ea2d3aa173daff8f47e49","first_computed_at":"2026-05-18T01:11:50.049037Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:50.049037Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RKxXvdLfUjKrMP96jvOr3lfdtpln8o+1MAl3nlxPqw1fKVA+7w0jWx9xyKCxK3KKfE/ixWHjrcSZMQiA5z0lCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:50.049380Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.03652","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6c8b93864eb30c66d2922472628ecd7de1d43ee0e0736dafa358c06bba4f2bff","sha256:0c7bae6abcda1f29139c8a3c54d77336b02764790981ed2aead567c54f885ed4"],"state_sha256":"52248c9be2b696714153c821cc8d65b9262f17ba67d8f4d1822959f494a59aa8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Irg7PNhGcP/1MSvtFVP0xhcS61gh/60XTkPPJFz421SNpHg7YyI0y+6JParQ8rB16S700HnBQcE8nth6V1l6AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T21:56:22.739215Z","bundle_sha256":"afd1ff15f58590f6f2f94532ef5931b104f1692f1dc783cbeb33d74ca02921d8"}}