{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:QLPS7AUP3GM5ZIXYSZ6AVTPJC7","short_pith_number":"pith:QLPS7AUP","canonical_record":{"source":{"id":"1506.08892","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-06-29T23:04:34Z","cross_cats_sorted":[],"title_canon_sha256":"4cace12176a17554a5df828ee75fd6d6462542b4fd4198eccefe64c37b6995fc","abstract_canon_sha256":"2b0f1d93812432d85b53473b648b2bcc22334d84c49c89e35cfa88bd8359af58"},"schema_version":"1.0"},"canonical_sha256":"82df2f828fd999dca2f8967c0acde917ce749702c5362f17a9a106e1eee2c343","source":{"kind":"arxiv","id":"1506.08892","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.08892","created_at":"2026-05-18T01:23:23Z"},{"alias_kind":"arxiv_version","alias_value":"1506.08892v1","created_at":"2026-05-18T01:23:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.08892","created_at":"2026-05-18T01:23:23Z"},{"alias_kind":"pith_short_12","alias_value":"QLPS7AUP3GM5","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QLPS7AUP3GM5ZIXY","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QLPS7AUP","created_at":"2026-05-18T12:29:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:QLPS7AUP3GM5ZIXYSZ6AVTPJC7","target":"record","payload":{"canonical_record":{"source":{"id":"1506.08892","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-06-29T23:04:34Z","cross_cats_sorted":[],"title_canon_sha256":"4cace12176a17554a5df828ee75fd6d6462542b4fd4198eccefe64c37b6995fc","abstract_canon_sha256":"2b0f1d93812432d85b53473b648b2bcc22334d84c49c89e35cfa88bd8359af58"},"schema_version":"1.0"},"canonical_sha256":"82df2f828fd999dca2f8967c0acde917ce749702c5362f17a9a106e1eee2c343","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:23:23.946393Z","signature_b64":"fpQYy6nigZQGOAwiyFIDM4J64+61/n/InkJxzNx7MQ+XI6sHf0UWvRxd+EdhEfOj691oI2kelg94eAuz9L9WBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"82df2f828fd999dca2f8967c0acde917ce749702c5362f17a9a106e1eee2c343","last_reissued_at":"2026-05-18T01:23:23.945579Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:23:23.945579Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.08892","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:23:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n/0o5UQDGLuTe2ZvRLhAGiL8RE2RyeE08RxcGFieng2hkMgrDQaJGP0UHcrxwoMDYs1xR/BxJftDO1NEP+4OBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T14:20:07.872092Z"},"content_sha256":"da9d05cb08ca3fbc1034b8adf1672404886f931513fc64c8ede314510f09348b","schema_version":"1.0","event_id":"sha256:da9d05cb08ca3fbc1034b8adf1672404886f931513fc64c8ede314510f09348b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:QLPS7AUP3GM5ZIXYSZ6AVTPJC7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the novelty, efficacy, and significance of weak measurements for quantum tomography","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Carlton M. Caves, Christopher Ferrie, Jonathan A. Gross, Ninnat Dangniam","submitted_at":"2015-06-29T23:04:34Z","abstract_excerpt":"The use of weak measurements for performing quantum tomography is enjoying increased attention due to several recent proposals. The advertised merits of using weak measurements in this context are varied, but are generally represented by novelty, increased efficacy, and foundational significance. We critically evaluate two proposals that make such claims and find that weak measurements are not an essential ingredient for most of their advertised features."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.08892","kind":"arxiv","version":1},"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":"2026-05-18T01:23:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q1mfa9aNSdFRK8pm0N9X6g1lql9l35BHWjdyIkB293q81j1HgkT9I8nnwK+hnOykWSQlPNzh/ssLIt9Dn1ePBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T14:20:07.872484Z"},"content_sha256":"c32bbf5acc29ff4bf2cc39c42b854b6cbba57ef35c5ff65220b94d2c098eb25c","schema_version":"1.0","event_id":"sha256:c32bbf5acc29ff4bf2cc39c42b854b6cbba57ef35c5ff65220b94d2c098eb25c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QLPS7AUP3GM5ZIXYSZ6AVTPJC7/bundle.json","state_url":"https://pith.science/pith/QLPS7AUP3GM5ZIXYSZ6AVTPJC7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QLPS7AUP3GM5ZIXYSZ6AVTPJC7/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":"2026-05-25T14:20:07Z","links":{"resolver":"https://pith.science/pith/QLPS7AUP3GM5ZIXYSZ6AVTPJC7","bundle":"https://pith.science/pith/QLPS7AUP3GM5ZIXYSZ6AVTPJC7/bundle.json","state":"https://pith.science/pith/QLPS7AUP3GM5ZIXYSZ6AVTPJC7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QLPS7AUP3GM5ZIXYSZ6AVTPJC7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QLPS7AUP3GM5ZIXYSZ6AVTPJC7","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":"2b0f1d93812432d85b53473b648b2bcc22334d84c49c89e35cfa88bd8359af58","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-06-29T23:04:34Z","title_canon_sha256":"4cace12176a17554a5df828ee75fd6d6462542b4fd4198eccefe64c37b6995fc"},"schema_version":"1.0","source":{"id":"1506.08892","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.08892","created_at":"2026-05-18T01:23:23Z"},{"alias_kind":"arxiv_version","alias_value":"1506.08892v1","created_at":"2026-05-18T01:23:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.08892","created_at":"2026-05-18T01:23:23Z"},{"alias_kind":"pith_short_12","alias_value":"QLPS7AUP3GM5","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QLPS7AUP3GM5ZIXY","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QLPS7AUP","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:c32bbf5acc29ff4bf2cc39c42b854b6cbba57ef35c5ff65220b94d2c098eb25c","target":"graph","created_at":"2026-05-18T01:23:23Z","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":"The use of weak measurements for performing quantum tomography is enjoying increased attention due to several recent proposals. The advertised merits of using weak measurements in this context are varied, but are generally represented by novelty, increased efficacy, and foundational significance. We critically evaluate two proposals that make such claims and find that weak measurements are not an essential ingredient for most of their advertised features.","authors_text":"Carlton M. Caves, Christopher Ferrie, Jonathan A. Gross, Ninnat Dangniam","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-06-29T23:04:34Z","title":"On the novelty, efficacy, and significance of weak measurements for quantum tomography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.08892","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:da9d05cb08ca3fbc1034b8adf1672404886f931513fc64c8ede314510f09348b","target":"record","created_at":"2026-05-18T01:23:23Z","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":"2b0f1d93812432d85b53473b648b2bcc22334d84c49c89e35cfa88bd8359af58","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-06-29T23:04:34Z","title_canon_sha256":"4cace12176a17554a5df828ee75fd6d6462542b4fd4198eccefe64c37b6995fc"},"schema_version":"1.0","source":{"id":"1506.08892","kind":"arxiv","version":1}},"canonical_sha256":"82df2f828fd999dca2f8967c0acde917ce749702c5362f17a9a106e1eee2c343","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"82df2f828fd999dca2f8967c0acde917ce749702c5362f17a9a106e1eee2c343","first_computed_at":"2026-05-18T01:23:23.945579Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:23:23.945579Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fpQYy6nigZQGOAwiyFIDM4J64+61/n/InkJxzNx7MQ+XI6sHf0UWvRxd+EdhEfOj691oI2kelg94eAuz9L9WBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:23:23.946393Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.08892","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:da9d05cb08ca3fbc1034b8adf1672404886f931513fc64c8ede314510f09348b","sha256:c32bbf5acc29ff4bf2cc39c42b854b6cbba57ef35c5ff65220b94d2c098eb25c"],"state_sha256":"1a0d328512c08a8d09bfca162edd90a9e4162dfbe1b50079dbffc96536471f3a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KmvbdE4PqnQTOTg5bNT3UMTXDA/3CVk8xuXJCGKuLHgIRmRmWtRmDSXOBABDya3VAGAfpbw1W3VI3KGR8TrTCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T14:20:07.875295Z","bundle_sha256":"36ad06b5fc95085cefd7dd0c2c7a576426ef467db496389c4057511da8cb1196"}}