{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:L6SDNWFTM5AADP2QGRBXV4HTW4","short_pith_number":"pith:L6SDNWFT","canonical_record":{"source":{"id":"1710.02235","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-10-05T22:35:12Z","cross_cats_sorted":[],"title_canon_sha256":"a8550be0b1b45284c483b19a4644f976d3470f516e2995f029c9367c1affc6d7","abstract_canon_sha256":"5bab7c443c20a3444cb694e6d2b8dbcda62f59b073694163d6678d639a2fc0f7"},"schema_version":"1.0"},"canonical_sha256":"5fa436d8b3674001bf5034437af0f3b73444322afed94007e358919ee1ff2593","source":{"kind":"arxiv","id":"1710.02235","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.02235","created_at":"2026-05-18T00:24:16Z"},{"alias_kind":"arxiv_version","alias_value":"1710.02235v2","created_at":"2026-05-18T00:24:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.02235","created_at":"2026-05-18T00:24:16Z"},{"alias_kind":"pith_short_12","alias_value":"L6SDNWFTM5AA","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"L6SDNWFTM5AADP2Q","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"L6SDNWFT","created_at":"2026-05-18T12:31:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:L6SDNWFTM5AADP2QGRBXV4HTW4","target":"record","payload":{"canonical_record":{"source":{"id":"1710.02235","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-10-05T22:35:12Z","cross_cats_sorted":[],"title_canon_sha256":"a8550be0b1b45284c483b19a4644f976d3470f516e2995f029c9367c1affc6d7","abstract_canon_sha256":"5bab7c443c20a3444cb694e6d2b8dbcda62f59b073694163d6678d639a2fc0f7"},"schema_version":"1.0"},"canonical_sha256":"5fa436d8b3674001bf5034437af0f3b73444322afed94007e358919ee1ff2593","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:24:16.002647Z","signature_b64":"CNjomkgmfZmTHxs97ZF/FyVvrjbQa6hFqsIApCWmbkjeroSLYl4p1UL6IIROCN1MnIatY5MNMLTYAvZAZ8xLBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5fa436d8b3674001bf5034437af0f3b73444322afed94007e358919ee1ff2593","last_reissued_at":"2026-05-18T00:24:16.002224Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:24:16.002224Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1710.02235","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:24:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EUlKeyCPTyCRCdeQYHuvB2h+bC9hhGv4ys8cr7GT5BzdNRpHZpdCpc9c2LlP2xboi5w3df5O1xEZxtFUhKokDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:51:56.187344Z"},"content_sha256":"59c787f272f4f65584dd4e54f53563f0f54105a57a00ec54c6b45833f24747dc","schema_version":"1.0","event_id":"sha256:59c787f272f4f65584dd4e54f53563f0f54105a57a00ec54c6b45833f24747dc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:L6SDNWFTM5AADP2QGRBXV4HTW4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Entropic relations for retrodicted quantum measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Adrian A. Budini","submitted_at":"2017-10-05T22:35:12Z","abstract_excerpt":"Given an arbitrary measurement over a system of interest, the outcome of a posterior measurement can be used for improving the statistical estimation of the system state after the former measurement. Here, we realize an informational-entropic study of this kind of (Bayesian) retrodicted quantum measurement formulated in the context of quantum state smoothing. We show that the (average) entropy of the system state after the retrodicted measurement (smoothed state) is bounded from below and above by the entropies of the first measurement when performed in a selective and non-selective standard p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.02235","kind":"arxiv","version":2},"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":"2026-05-18T00:24:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a7BIREFonfYAajy4ZAeQFTXv7hb/VE7wTIvifPUI6mXXxkw2czKvDi1Xmgf4qchbr3f8D6l1+bTdibbXlVYlCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:51:56.187992Z"},"content_sha256":"bd7101e2dca3cef8db04b4ac4773b9d03264e8e50d9b2b7241f47524e952299e","schema_version":"1.0","event_id":"sha256:bd7101e2dca3cef8db04b4ac4773b9d03264e8e50d9b2b7241f47524e952299e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L6SDNWFTM5AADP2QGRBXV4HTW4/bundle.json","state_url":"https://pith.science/pith/L6SDNWFTM5AADP2QGRBXV4HTW4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L6SDNWFTM5AADP2QGRBXV4HTW4/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":"2026-05-27T16:51:56Z","links":{"resolver":"https://pith.science/pith/L6SDNWFTM5AADP2QGRBXV4HTW4","bundle":"https://pith.science/pith/L6SDNWFTM5AADP2QGRBXV4HTW4/bundle.json","state":"https://pith.science/pith/L6SDNWFTM5AADP2QGRBXV4HTW4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L6SDNWFTM5AADP2QGRBXV4HTW4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:L6SDNWFTM5AADP2QGRBXV4HTW4","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":"5bab7c443c20a3444cb694e6d2b8dbcda62f59b073694163d6678d639a2fc0f7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-10-05T22:35:12Z","title_canon_sha256":"a8550be0b1b45284c483b19a4644f976d3470f516e2995f029c9367c1affc6d7"},"schema_version":"1.0","source":{"id":"1710.02235","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.02235","created_at":"2026-05-18T00:24:16Z"},{"alias_kind":"arxiv_version","alias_value":"1710.02235v2","created_at":"2026-05-18T00:24:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.02235","created_at":"2026-05-18T00:24:16Z"},{"alias_kind":"pith_short_12","alias_value":"L6SDNWFTM5AA","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"L6SDNWFTM5AADP2Q","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"L6SDNWFT","created_at":"2026-05-18T12:31:28Z"}],"graph_snapshots":[{"event_id":"sha256:bd7101e2dca3cef8db04b4ac4773b9d03264e8e50d9b2b7241f47524e952299e","target":"graph","created_at":"2026-05-18T00:24:16Z","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":"Given an arbitrary measurement over a system of interest, the outcome of a posterior measurement can be used for improving the statistical estimation of the system state after the former measurement. Here, we realize an informational-entropic study of this kind of (Bayesian) retrodicted quantum measurement formulated in the context of quantum state smoothing. We show that the (average) entropy of the system state after the retrodicted measurement (smoothed state) is bounded from below and above by the entropies of the first measurement when performed in a selective and non-selective standard p","authors_text":"Adrian A. Budini","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-10-05T22:35:12Z","title":"Entropic relations for retrodicted quantum measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.02235","kind":"arxiv","version":2},"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":"sha256:59c787f272f4f65584dd4e54f53563f0f54105a57a00ec54c6b45833f24747dc","target":"record","created_at":"2026-05-18T00:24:16Z","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":"5bab7c443c20a3444cb694e6d2b8dbcda62f59b073694163d6678d639a2fc0f7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-10-05T22:35:12Z","title_canon_sha256":"a8550be0b1b45284c483b19a4644f976d3470f516e2995f029c9367c1affc6d7"},"schema_version":"1.0","source":{"id":"1710.02235","kind":"arxiv","version":2}},"canonical_sha256":"5fa436d8b3674001bf5034437af0f3b73444322afed94007e358919ee1ff2593","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5fa436d8b3674001bf5034437af0f3b73444322afed94007e358919ee1ff2593","first_computed_at":"2026-05-18T00:24:16.002224Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:24:16.002224Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CNjomkgmfZmTHxs97ZF/FyVvrjbQa6hFqsIApCWmbkjeroSLYl4p1UL6IIROCN1MnIatY5MNMLTYAvZAZ8xLBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:24:16.002647Z","signed_message":"canonical_sha256_bytes"},"source_id":"1710.02235","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:59c787f272f4f65584dd4e54f53563f0f54105a57a00ec54c6b45833f24747dc","sha256:bd7101e2dca3cef8db04b4ac4773b9d03264e8e50d9b2b7241f47524e952299e"],"state_sha256":"118f2f6b7a31f902f35d5f40f97451459e2e71a6e134c8ab718f26e39aa4092a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DT9WtBIwJn7MJt/ECt9wlqhy9mEdRKNueNz12bxzIym4nr+hOE7LFar6iDTLw5FgdezLNLI7yktcrKyATxWYAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T16:51:56.191145Z","bundle_sha256":"6674792a193d013fdf4de668eb165d24dc5dd0aa10baa5ebf1b9660115787169"}}