{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:LFVBDAMIDQ4V4S7XDXSQ4535LD","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":"3aab767ffdd57c9aba7d1f8412f3fc55478fc32ae67f72cb84c990d8333713d7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-04-26T19:00:54Z","title_canon_sha256":"88e53485c54834bf7c87d64d7c689040e76b16bf1dd40e2066d707617918c2a3"},"schema_version":"1.0","source":{"id":"1604.08113","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.08113","created_at":"2026-05-18T01:13:23Z"},{"alias_kind":"arxiv_version","alias_value":"1604.08113v1","created_at":"2026-05-18T01:13:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.08113","created_at":"2026-05-18T01:13:23Z"},{"alias_kind":"pith_short_12","alias_value":"LFVBDAMIDQ4V","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"LFVBDAMIDQ4V4S7X","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"LFVBDAMI","created_at":"2026-05-18T12:30:29Z"}],"graph_snapshots":[{"event_id":"sha256:443d71ce9080331260a20b9f93eeacf1aa47012021e30b1f253aebaa0a5bcb6b","target":"graph","created_at":"2026-05-18T01:13:23Z","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 briefly review single-qubit quantum process tomography for trace-preserving and nontrace-preserving processes, and derive explicit forms of the general constraints for fitting experimental data. These new forms provide additional insight into the structure of the process matrix. We illustrate their utility with several examples, including a discussion of qubit leakage error models and the intuition which can be gained from their process matrices.","authors_text":"Nicholas A. Peters, Ramesh Bhandari","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-04-26T19:00:54Z","title":"On the general constraints in single qubit quantum process tomography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.08113","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:dcaf6660941ce7450891c0c90977d19c1d6a04e1a13bd9d334f7f885673c71e5","target":"record","created_at":"2026-05-18T01:13:23Z","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":"3aab767ffdd57c9aba7d1f8412f3fc55478fc32ae67f72cb84c990d8333713d7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-04-26T19:00:54Z","title_canon_sha256":"88e53485c54834bf7c87d64d7c689040e76b16bf1dd40e2066d707617918c2a3"},"schema_version":"1.0","source":{"id":"1604.08113","kind":"arxiv","version":1}},"canonical_sha256":"596a1181881c395e4bf71de50e777d58ce2391e6f2d00da1c89e5c631591db5e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"596a1181881c395e4bf71de50e777d58ce2391e6f2d00da1c89e5c631591db5e","first_computed_at":"2026-05-18T01:13:23.303667Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:13:23.303667Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wdz1qChUoP+/O7FjHPSXE25HMPLoullV//TI8VRcDWOIG0HpAaeCtRZJJiAH4fmo/67YLGY0XB3QyfSIjQ+9Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T01:13:23.304139Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.08113","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dcaf6660941ce7450891c0c90977d19c1d6a04e1a13bd9d334f7f885673c71e5","sha256:443d71ce9080331260a20b9f93eeacf1aa47012021e30b1f253aebaa0a5bcb6b"],"state_sha256":"cbd2d7c2e51ce2991178a29fbc91c3795e542e7bd829f34a5e6643a0b2ff3552"}