{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:NVGNEFXSVVIIWFPHJRA7X3WZQJ","short_pith_number":"pith:NVGNEFXS","canonical_record":{"source":{"id":"0804.0529","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-04-03T11:48:04Z","cross_cats_sorted":[],"title_canon_sha256":"3def7da13cbfc9f39c0187bd4ad07cc95a5f4c702dbebfb35b2d7b829488d4a4","abstract_canon_sha256":"1a6451e063ea523667a88d9bd06deecebafa0d949133daba4c66179313d3baa9"},"schema_version":"1.0"},"canonical_sha256":"6d4cd216f2ad508b15e74c41fbeed982459e63f2326cacab8c04b366b68c148b","source":{"kind":"arxiv","id":"0804.0529","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.0529","created_at":"2026-05-18T03:32:59Z"},{"alias_kind":"arxiv_version","alias_value":"0804.0529v3","created_at":"2026-05-18T03:32:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.0529","created_at":"2026-05-18T03:32:59Z"},{"alias_kind":"pith_short_12","alias_value":"NVGNEFXSVVII","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"NVGNEFXSVVIIWFPH","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"NVGNEFXS","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:NVGNEFXSVVIIWFPHJRA7X3WZQJ","target":"record","payload":{"canonical_record":{"source":{"id":"0804.0529","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-04-03T11:48:04Z","cross_cats_sorted":[],"title_canon_sha256":"3def7da13cbfc9f39c0187bd4ad07cc95a5f4c702dbebfb35b2d7b829488d4a4","abstract_canon_sha256":"1a6451e063ea523667a88d9bd06deecebafa0d949133daba4c66179313d3baa9"},"schema_version":"1.0"},"canonical_sha256":"6d4cd216f2ad508b15e74c41fbeed982459e63f2326cacab8c04b366b68c148b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:32:59.138342Z","signature_b64":"CMK4P+WAwovPZTvwglNE94TNnhbvSXttLHxbUXxhon+XnKC0yvoMdG+7OufBX35/q3FQno/vH3SPHUbEXWLsCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6d4cd216f2ad508b15e74c41fbeed982459e63f2326cacab8c04b366b68c148b","last_reissued_at":"2026-05-18T03:32:59.137729Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:32:59.137729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0804.0529","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":"2026-05-18T03:32:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GWLNkgTEK8xT6mNJL0uGnXCqjtmf2SGjIAM2OwSXLHznte7j91lXffz0xzm7r5aocDJaB+E4L4GXbqdW0YlxAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:23:34.830293Z"},"content_sha256":"d43d6e835161553a0e94adbbd8b9a5fb3020922587475d8bd7be6cf609c58eba","schema_version":"1.0","event_id":"sha256:d43d6e835161553a0e94adbbd8b9a5fb3020922587475d8bd7be6cf609c58eba"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:NVGNEFXSVVIIWFPHJRA7X3WZQJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extensions of the quantum Fano inequality","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Naresh Sharma","submitted_at":"2008-04-03T11:48:04Z","abstract_excerpt":"Quantum Fano inequality (QFI) in quantum information theory provides an upper bound to the entropy exchange by a function of the entanglement fidelity. We give various Fano-like upper bounds to the entropy exchange and QFI is a special case of these bounds. These bounds also give an alternate derivation of the QFI."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.0529","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":"2026-05-18T03:32:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mqojF599ro/WhKDn2uNhs61M/lZHaMab+XgVEVzlJE5EPrI6H+cw2MrcDWABvE8C1wWPgVmInx7C9qemOm6xDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:23:34.830998Z"},"content_sha256":"791a828c02486fc077713a3c5533de8706795fe07a68002fb841e0ac7bcc53f1","schema_version":"1.0","event_id":"sha256:791a828c02486fc077713a3c5533de8706795fe07a68002fb841e0ac7bcc53f1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NVGNEFXSVVIIWFPHJRA7X3WZQJ/bundle.json","state_url":"https://pith.science/pith/NVGNEFXSVVIIWFPHJRA7X3WZQJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NVGNEFXSVVIIWFPHJRA7X3WZQJ/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":"2026-05-27T22:23:34Z","links":{"resolver":"https://pith.science/pith/NVGNEFXSVVIIWFPHJRA7X3WZQJ","bundle":"https://pith.science/pith/NVGNEFXSVVIIWFPHJRA7X3WZQJ/bundle.json","state":"https://pith.science/pith/NVGNEFXSVVIIWFPHJRA7X3WZQJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NVGNEFXSVVIIWFPHJRA7X3WZQJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:NVGNEFXSVVIIWFPHJRA7X3WZQJ","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":"1a6451e063ea523667a88d9bd06deecebafa0d949133daba4c66179313d3baa9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-04-03T11:48:04Z","title_canon_sha256":"3def7da13cbfc9f39c0187bd4ad07cc95a5f4c702dbebfb35b2d7b829488d4a4"},"schema_version":"1.0","source":{"id":"0804.0529","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.0529","created_at":"2026-05-18T03:32:59Z"},{"alias_kind":"arxiv_version","alias_value":"0804.0529v3","created_at":"2026-05-18T03:32:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.0529","created_at":"2026-05-18T03:32:59Z"},{"alias_kind":"pith_short_12","alias_value":"NVGNEFXSVVII","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"NVGNEFXSVVIIWFPH","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"NVGNEFXS","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:791a828c02486fc077713a3c5533de8706795fe07a68002fb841e0ac7bcc53f1","target":"graph","created_at":"2026-05-18T03:32:59Z","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":"Quantum Fano inequality (QFI) in quantum information theory provides an upper bound to the entropy exchange by a function of the entanglement fidelity. We give various Fano-like upper bounds to the entropy exchange and QFI is a special case of these bounds. These bounds also give an alternate derivation of the QFI.","authors_text":"Naresh Sharma","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-04-03T11:48:04Z","title":"Extensions of the quantum Fano inequality"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.0529","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:d43d6e835161553a0e94adbbd8b9a5fb3020922587475d8bd7be6cf609c58eba","target":"record","created_at":"2026-05-18T03:32:59Z","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":"1a6451e063ea523667a88d9bd06deecebafa0d949133daba4c66179313d3baa9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-04-03T11:48:04Z","title_canon_sha256":"3def7da13cbfc9f39c0187bd4ad07cc95a5f4c702dbebfb35b2d7b829488d4a4"},"schema_version":"1.0","source":{"id":"0804.0529","kind":"arxiv","version":3}},"canonical_sha256":"6d4cd216f2ad508b15e74c41fbeed982459e63f2326cacab8c04b366b68c148b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d4cd216f2ad508b15e74c41fbeed982459e63f2326cacab8c04b366b68c148b","first_computed_at":"2026-05-18T03:32:59.137729Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:32:59.137729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CMK4P+WAwovPZTvwglNE94TNnhbvSXttLHxbUXxhon+XnKC0yvoMdG+7OufBX35/q3FQno/vH3SPHUbEXWLsCg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:32:59.138342Z","signed_message":"canonical_sha256_bytes"},"source_id":"0804.0529","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d43d6e835161553a0e94adbbd8b9a5fb3020922587475d8bd7be6cf609c58eba","sha256:791a828c02486fc077713a3c5533de8706795fe07a68002fb841e0ac7bcc53f1"],"state_sha256":"bdffefbdae4b8902dec157d70afb3e4146a6498d09368695e41cd0f3c970077e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9J87G55v4cKpzhdMnmRepkrPqUHspABN8ltJuZSa3HPJGBMrIcG7rmb+UhL8M+nY2smKVL8/cH1WC1zl9OaJDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T22:23:34.834896Z","bundle_sha256":"eb74472e75d90da074b036f044da669e29440c36e502bdf022f8f8bb464f42a8"}}