{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:3TN37XEHC6RJJZAGXGRXPUBLP4","short_pith_number":"pith:3TN37XEH","schema_version":"1.0","canonical_sha256":"dcdbbfdc8717a294e406b9a377d02b7f0f83bf66057eb55c51a7d555f75acddf","source":{"kind":"arxiv","id":"2009.09499","version":2},"attestation_state":"computed","paper":{"title":"A no-go theorem for the persistent reality of Wigner's friend's perception","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Flavio Del Santo, Philippe Allard Gu\\'erin, \\v{C}aslav Brukner, Veronika Baumann","submitted_at":"2020-09-20T18:56:52Z","abstract_excerpt":"The notorious Wigner's friend thought experiment (and modifications thereof) has in recent years received renewed interest especially due to new arguments that force us to question some of the fundamental assumptions of quantum theory. In this paper, we formulate a no-go theorem for the persistent reality of Wigner's friend's perception, which allows us to conclude that the perceptions that the friend has of her own measurement outcomes at different times cannot \"share the same reality\", if seemingly natural quantum mechanical assumptions are met. More formally, this means that, in a Wigner's "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2009.09499","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-09-20T18:56:52Z","cross_cats_sorted":[],"title_canon_sha256":"b549a81a07ed4c267aa5e08cad3f73e3c0663dc8e270e55c8bbb13d28458e64e","abstract_canon_sha256":"1a9c9d8d88bc93ebda892e2f5a08ad5da267a7511743b4a7aa159c90b1e1ac30"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:40:28.921420Z","signature_b64":"CQwAis1RHErtXNKbFKjYtXHb+t6GH2LG8AUlzfyBfMomoAKuJz38hvX0Wnqzm72OxXxzhOyuaruKr6Q0J9uNCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dcdbbfdc8717a294e406b9a377d02b7f0f83bf66057eb55c51a7d555f75acddf","last_reissued_at":"2026-07-05T02:40:28.921015Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:40:28.921015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A no-go theorem for the persistent reality of Wigner's friend's perception","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Flavio Del Santo, Philippe Allard Gu\\'erin, \\v{C}aslav Brukner, Veronika Baumann","submitted_at":"2020-09-20T18:56:52Z","abstract_excerpt":"The notorious Wigner's friend thought experiment (and modifications thereof) has in recent years received renewed interest especially due to new arguments that force us to question some of the fundamental assumptions of quantum theory. In this paper, we formulate a no-go theorem for the persistent reality of Wigner's friend's perception, which allows us to conclude that the perceptions that the friend has of her own measurement outcomes at different times cannot \"share the same reality\", if seemingly natural quantum mechanical assumptions are met. More formally, this means that, in a Wigner's "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.09499","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2009.09499/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2009.09499","created_at":"2026-07-05T02:40:28.921071+00:00"},{"alias_kind":"arxiv_version","alias_value":"2009.09499v2","created_at":"2026-07-05T02:40:28.921071+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.09499","created_at":"2026-07-05T02:40:28.921071+00:00"},{"alias_kind":"pith_short_12","alias_value":"3TN37XEHC6RJ","created_at":"2026-07-05T02:40:28.921071+00:00"},{"alias_kind":"pith_short_16","alias_value":"3TN37XEHC6RJJZAG","created_at":"2026-07-05T02:40:28.921071+00:00"},{"alias_kind":"pith_short_8","alias_value":"3TN37XEH","created_at":"2026-07-05T02:40:28.921071+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3TN37XEHC6RJJZAGXGRXPUBLP4","json":"https://pith.science/pith/3TN37XEHC6RJJZAGXGRXPUBLP4.json","graph_json":"https://pith.science/api/pith-number/3TN37XEHC6RJJZAGXGRXPUBLP4/graph.json","events_json":"https://pith.science/api/pith-number/3TN37XEHC6RJJZAGXGRXPUBLP4/events.json","paper":"https://pith.science/paper/3TN37XEH"},"agent_actions":{"view_html":"https://pith.science/pith/3TN37XEHC6RJJZAGXGRXPUBLP4","download_json":"https://pith.science/pith/3TN37XEHC6RJJZAGXGRXPUBLP4.json","view_paper":"https://pith.science/paper/3TN37XEH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2009.09499&json=true","fetch_graph":"https://pith.science/api/pith-number/3TN37XEHC6RJJZAGXGRXPUBLP4/graph.json","fetch_events":"https://pith.science/api/pith-number/3TN37XEHC6RJJZAGXGRXPUBLP4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3TN37XEHC6RJJZAGXGRXPUBLP4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3TN37XEHC6RJJZAGXGRXPUBLP4/action/storage_attestation","attest_author":"https://pith.science/pith/3TN37XEHC6RJJZAGXGRXPUBLP4/action/author_attestation","sign_citation":"https://pith.science/pith/3TN37XEHC6RJJZAGXGRXPUBLP4/action/citation_signature","submit_replication":"https://pith.science/pith/3TN37XEHC6RJJZAGXGRXPUBLP4/action/replication_record"}},"created_at":"2026-07-05T02:40:28.921071+00:00","updated_at":"2026-07-05T02:40:28.921071+00:00"}