{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:22KTL7S46VBKV4X4CGDPL2JENJ","short_pith_number":"pith:22KTL7S4","schema_version":"1.0","canonical_sha256":"d69535fe5cf542aaf2fc1186f5e9246a4e1b5624bb44c00c519b81e8db100331","source":{"kind":"arxiv","id":"2112.11473","version":2},"attestation_state":"computed","paper":{"title":"Quantum reference frames for an indefinite metric","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"quant-ph","authors_text":"Anne-Catherine de la Hamette, Esteban Castro-Ruiz, \\v{C}aslav Brukner, Viktoria Kabel","submitted_at":"2021-12-21T19:00:04Z","abstract_excerpt":"The current theories of quantum physics and general relativity on their own do not allow us to study situations in which the gravitational source is quantum. Here, we propose a strategy to determine the dynamics of objects in the presence of mass configurations in superposition, and hence an indefinite spacetime metric, using quantum reference frame (QRF) transformations. Specifically, we show that, as long as the mass configurations in the different branches are related via relative-distance-preserving transformations, one can use an extension of the current framework of QRFs to change to a f"},"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":"2112.11473","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-12-21T19:00:04Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"0dfe9fd618adb56395ae53c3a171a65ac51421ecb2baab4b8951cf385b1c6427","abstract_canon_sha256":"e95899358d7e313cdf86553251d250a7cb39fed8bfee94ef5a75a2edeff485fb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:45:56.654360Z","signature_b64":"7qESo9frva0pTJKWoYIFx6Hla7R6Oeela5v8a/ODoIP2ZUOju92Eba6S8SoG8Wie36nRrsUf3GcXNE89iBqsDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d69535fe5cf542aaf2fc1186f5e9246a4e1b5624bb44c00c519b81e8db100331","last_reissued_at":"2026-07-05T06:45:56.653857Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:45:56.653857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Quantum reference frames for an indefinite metric","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"quant-ph","authors_text":"Anne-Catherine de la Hamette, Esteban Castro-Ruiz, \\v{C}aslav Brukner, Viktoria Kabel","submitted_at":"2021-12-21T19:00:04Z","abstract_excerpt":"The current theories of quantum physics and general relativity on their own do not allow us to study situations in which the gravitational source is quantum. Here, we propose a strategy to determine the dynamics of objects in the presence of mass configurations in superposition, and hence an indefinite spacetime metric, using quantum reference frame (QRF) transformations. Specifically, we show that, as long as the mass configurations in the different branches are related via relative-distance-preserving transformations, one can use an extension of the current framework of QRFs to change to a f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.11473","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/2112.11473/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":"2112.11473","created_at":"2026-07-05T06:45:56.653918+00:00"},{"alias_kind":"arxiv_version","alias_value":"2112.11473v2","created_at":"2026-07-05T06:45:56.653918+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.11473","created_at":"2026-07-05T06:45:56.653918+00:00"},{"alias_kind":"pith_short_12","alias_value":"22KTL7S46VBK","created_at":"2026-07-05T06:45:56.653918+00:00"},{"alias_kind":"pith_short_16","alias_value":"22KTL7S46VBKV4X4","created_at":"2026-07-05T06:45:56.653918+00:00"},{"alias_kind":"pith_short_8","alias_value":"22KTL7S4","created_at":"2026-07-05T06:45:56.653918+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2606.09344","citing_title":"Quantum Reference Fields Transformations in Linearized Quantum Gravity","ref_index":87,"is_internal_anchor":false},{"citing_arxiv_id":"2508.05897","citing_title":"A spacetime-covariant approach to inertial and accelerated quantum clocks in first-quantization","ref_index":14,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/22KTL7S46VBKV4X4CGDPL2JENJ","json":"https://pith.science/pith/22KTL7S46VBKV4X4CGDPL2JENJ.json","graph_json":"https://pith.science/api/pith-number/22KTL7S46VBKV4X4CGDPL2JENJ/graph.json","events_json":"https://pith.science/api/pith-number/22KTL7S46VBKV4X4CGDPL2JENJ/events.json","paper":"https://pith.science/paper/22KTL7S4"},"agent_actions":{"view_html":"https://pith.science/pith/22KTL7S46VBKV4X4CGDPL2JENJ","download_json":"https://pith.science/pith/22KTL7S46VBKV4X4CGDPL2JENJ.json","view_paper":"https://pith.science/paper/22KTL7S4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2112.11473&json=true","fetch_graph":"https://pith.science/api/pith-number/22KTL7S46VBKV4X4CGDPL2JENJ/graph.json","fetch_events":"https://pith.science/api/pith-number/22KTL7S46VBKV4X4CGDPL2JENJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/22KTL7S46VBKV4X4CGDPL2JENJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/22KTL7S46VBKV4X4CGDPL2JENJ/action/storage_attestation","attest_author":"https://pith.science/pith/22KTL7S46VBKV4X4CGDPL2JENJ/action/author_attestation","sign_citation":"https://pith.science/pith/22KTL7S46VBKV4X4CGDPL2JENJ/action/citation_signature","submit_replication":"https://pith.science/pith/22KTL7S46VBKV4X4CGDPL2JENJ/action/replication_record"}},"created_at":"2026-07-05T06:45:56.653918+00:00","updated_at":"2026-07-05T06:45:56.653918+00:00"}