{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:RYPE3K2MXYOHACBVVGGIYZFRNP","short_pith_number":"pith:RYPE3K2M","canonical_record":{"source":{"id":"1902.00785","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-02-02T20:39:40Z","cross_cats_sorted":[],"title_canon_sha256":"337a907ce071f46d3cc89c247b14defd8ee19a21371d54bb81d915c9e659adee","abstract_canon_sha256":"a894542480f946f9858011fd991000e1c471c57a8ba9c18b8dc740120be8b5b6"},"schema_version":"1.0"},"canonical_sha256":"8e1e4dab4cbe1c700835a98c8c64b16bc266e8a87bb374ba227da392b49f70f8","source":{"kind":"arxiv","id":"1902.00785","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.00785","created_at":"2026-05-17T23:54:52Z"},{"alias_kind":"arxiv_version","alias_value":"1902.00785v1","created_at":"2026-05-17T23:54:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.00785","created_at":"2026-05-17T23:54:52Z"},{"alias_kind":"pith_short_12","alias_value":"RYPE3K2MXYOH","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"RYPE3K2MXYOHACBV","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"RYPE3K2M","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:RYPE3K2MXYOHACBVVGGIYZFRNP","target":"record","payload":{"canonical_record":{"source":{"id":"1902.00785","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-02-02T20:39:40Z","cross_cats_sorted":[],"title_canon_sha256":"337a907ce071f46d3cc89c247b14defd8ee19a21371d54bb81d915c9e659adee","abstract_canon_sha256":"a894542480f946f9858011fd991000e1c471c57a8ba9c18b8dc740120be8b5b6"},"schema_version":"1.0"},"canonical_sha256":"8e1e4dab4cbe1c700835a98c8c64b16bc266e8a87bb374ba227da392b49f70f8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:52.172496Z","signature_b64":"ambwkLv+AJPniSPvyUVy1lx3bx3B7yVnNukUj6v6l6eAYeno0Ko9WZxQ38magCxEy0RKtNTg2Q0aqEnLgz0vAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8e1e4dab4cbe1c700835a98c8c64b16bc266e8a87bb374ba227da392b49f70f8","last_reissued_at":"2026-05-17T23:54:52.171895Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:52.171895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.00785","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":"2026-05-17T23:54:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cT1xqPHrKt+sGamPbny8JbaNnPYPwsCJ55cJWeJc/kLXjq22q53Jue7AWwT4q9eknrvHmPVEXL4+gvj7c5qECQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T17:18:32.790095Z"},"content_sha256":"3553950e97d3642cc2311801f3cd93ebb31d6fd1e0579d07ade342464843edc4","schema_version":"1.0","event_id":"sha256:3553950e97d3642cc2311801f3cd93ebb31d6fd1e0579d07ade342464843edc4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:RYPE3K2MXYOHACBVVGGIYZFRNP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Some Consequences of the Thermodynamic Cost of System Identification","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Chris Fields","submitted_at":"2019-02-02T20:39:40Z","abstract_excerpt":"The concept of a ``system'' is foundational to physics, but the question of how observers identify systems is seldom addressed. Classical thermodynamics restricts observers to finite, finite-resolution observations with which to identify the systems on which ``pointer state'' measurements are to be made. It is shown that system identification is at best approximate, even in a finite world, and that violations of the Leggett--Garg and Bell/CHSH (Clauser-Horne-Shimony-Holt) inequalities emerge naturally as requirements for successful system identification."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.00785","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":"2026-05-17T23:54:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m0XmePQs5YEkzU3q+cFQrYz3ZPvt3MKLNbHnPfyPUqBoCbr2FI0gcTVoE0SzJtowBSPmF6Ip7SXsADUUMvKgDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T17:18:32.790466Z"},"content_sha256":"a406ef6cad58ce10e6b735683dbd82729de98f235bb587476561f4d28e67b2be","schema_version":"1.0","event_id":"sha256:a406ef6cad58ce10e6b735683dbd82729de98f235bb587476561f4d28e67b2be"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RYPE3K2MXYOHACBVVGGIYZFRNP/bundle.json","state_url":"https://pith.science/pith/RYPE3K2MXYOHACBVVGGIYZFRNP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RYPE3K2MXYOHACBVVGGIYZFRNP/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":"2026-06-24T17:18:32Z","links":{"resolver":"https://pith.science/pith/RYPE3K2MXYOHACBVVGGIYZFRNP","bundle":"https://pith.science/pith/RYPE3K2MXYOHACBVVGGIYZFRNP/bundle.json","state":"https://pith.science/pith/RYPE3K2MXYOHACBVVGGIYZFRNP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RYPE3K2MXYOHACBVVGGIYZFRNP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:RYPE3K2MXYOHACBVVGGIYZFRNP","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":"a894542480f946f9858011fd991000e1c471c57a8ba9c18b8dc740120be8b5b6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-02-02T20:39:40Z","title_canon_sha256":"337a907ce071f46d3cc89c247b14defd8ee19a21371d54bb81d915c9e659adee"},"schema_version":"1.0","source":{"id":"1902.00785","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.00785","created_at":"2026-05-17T23:54:52Z"},{"alias_kind":"arxiv_version","alias_value":"1902.00785v1","created_at":"2026-05-17T23:54:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.00785","created_at":"2026-05-17T23:54:52Z"},{"alias_kind":"pith_short_12","alias_value":"RYPE3K2MXYOH","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"RYPE3K2MXYOHACBV","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"RYPE3K2M","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:a406ef6cad58ce10e6b735683dbd82729de98f235bb587476561f4d28e67b2be","target":"graph","created_at":"2026-05-17T23:54:52Z","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 concept of a ``system'' is foundational to physics, but the question of how observers identify systems is seldom addressed. Classical thermodynamics restricts observers to finite, finite-resolution observations with which to identify the systems on which ``pointer state'' measurements are to be made. It is shown that system identification is at best approximate, even in a finite world, and that violations of the Leggett--Garg and Bell/CHSH (Clauser-Horne-Shimony-Holt) inequalities emerge naturally as requirements for successful system identification.","authors_text":"Chris Fields","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-02-02T20:39:40Z","title":"Some Consequences of the Thermodynamic Cost of System Identification"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.00785","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":"sha256:3553950e97d3642cc2311801f3cd93ebb31d6fd1e0579d07ade342464843edc4","target":"record","created_at":"2026-05-17T23:54:52Z","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":"a894542480f946f9858011fd991000e1c471c57a8ba9c18b8dc740120be8b5b6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-02-02T20:39:40Z","title_canon_sha256":"337a907ce071f46d3cc89c247b14defd8ee19a21371d54bb81d915c9e659adee"},"schema_version":"1.0","source":{"id":"1902.00785","kind":"arxiv","version":1}},"canonical_sha256":"8e1e4dab4cbe1c700835a98c8c64b16bc266e8a87bb374ba227da392b49f70f8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8e1e4dab4cbe1c700835a98c8c64b16bc266e8a87bb374ba227da392b49f70f8","first_computed_at":"2026-05-17T23:54:52.171895Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:52.171895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ambwkLv+AJPniSPvyUVy1lx3bx3B7yVnNukUj6v6l6eAYeno0Ko9WZxQ38magCxEy0RKtNTg2Q0aqEnLgz0vAQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:52.172496Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.00785","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3553950e97d3642cc2311801f3cd93ebb31d6fd1e0579d07ade342464843edc4","sha256:a406ef6cad58ce10e6b735683dbd82729de98f235bb587476561f4d28e67b2be"],"state_sha256":"94389e77d5fdee8483fea3ce1288c0d38565d1dedf36a2920a7538d8a4cb9d53"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xS2vvteTpz23tfxndM/Htm4H2gVTumQ/VOC+Qa+j2nREKcpXsDSp7KY1UIHBNjMi7w+PAegZegobY01ZUG7wAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T17:18:32.792462Z","bundle_sha256":"ce81ecdc91a7dabaaa819d4f810fdb277bf1fc15653b9985a2f9baba58a02a86"}}