{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2007:SKTRFT5LRD5AX5SVSACY5USOWT","short_pith_number":"pith:SKTRFT5L","schema_version":"1.0","canonical_sha256":"92a712cfab88fa0bf65590058ed24eb4e256f6f20b45e971a0a14ce90c3e62ed","source":{"kind":"arxiv","id":"quant-ph/0701019","version":1},"attestation_state":"computed","paper":{"title":"Quantum gravity computers: On the theory of computation with indefinite causal structure","license":"","headline":"","cross_cats":["gr-qc"],"primary_cat":"quant-ph","authors_text":"Lucien Hardy","submitted_at":"2007-01-05T10:48:08Z","abstract_excerpt":"A quantum gravity computer is one for which the particular effects of quantum gravity are relevant. In general relativity, causal structure is non-fixed. In quantum theory non-fixed quantities are subject to quantum uncertainty. It is therefore likely that, in a theory of quantum gravity, we will have indefinite causal structure. This means that there will be no matter of fact as to whether a particular interval is timelike or not. We study the implications of this for the theory of computation. Classical and quantum computations consist in ivolving the state of the computer through a sequence"},"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":"quant-ph/0701019","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2007-01-05T10:48:08Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"0ccc984918dc9e15ebc12d8cb47f29cab91671eb6791edd561761bc431ac7a6a","abstract_canon_sha256":"2462ba36ba1b2dbea41bd5410dcc5153f8bc9f0a4ca9cd5512ce0b0fceedb5b0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:53.610346Z","signature_b64":"Wz2kur0ANbsBX5/qR+2t7c9BqL4I+dXn32Iyt8/I4N8KB6OV1FFIcRvJPGBKQKWDeYSOFozPjuZIr0QGrzzDAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"92a712cfab88fa0bf65590058ed24eb4e256f6f20b45e971a0a14ce90c3e62ed","last_reissued_at":"2026-05-18T01:37:53.609860Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:53.609860Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Quantum gravity computers: On the theory of computation with indefinite causal structure","license":"","headline":"","cross_cats":["gr-qc"],"primary_cat":"quant-ph","authors_text":"Lucien Hardy","submitted_at":"2007-01-05T10:48:08Z","abstract_excerpt":"A quantum gravity computer is one for which the particular effects of quantum gravity are relevant. In general relativity, causal structure is non-fixed. In quantum theory non-fixed quantities are subject to quantum uncertainty. It is therefore likely that, in a theory of quantum gravity, we will have indefinite causal structure. This means that there will be no matter of fact as to whether a particular interval is timelike or not. We study the implications of this for the theory of computation. Classical and quantum computations consist in ivolving the state of the computer through a sequence"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0701019","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0701019","created_at":"2026-05-18T01:37:53.609931+00:00"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0701019v1","created_at":"2026-05-18T01:37:53.609931+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0701019","created_at":"2026-05-18T01:37:53.609931+00:00"},{"alias_kind":"pith_short_12","alias_value":"SKTRFT5LRD5A","created_at":"2026-05-18T12:25:56.245647+00:00"},{"alias_kind":"pith_short_16","alias_value":"SKTRFT5LRD5AX5SV","created_at":"2026-05-18T12:25:56.245647+00:00"},{"alias_kind":"pith_short_8","alias_value":"SKTRFT5L","created_at":"2026-05-18T12:25:56.245647+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/SKTRFT5LRD5AX5SVSACY5USOWT","json":"https://pith.science/pith/SKTRFT5LRD5AX5SVSACY5USOWT.json","graph_json":"https://pith.science/api/pith-number/SKTRFT5LRD5AX5SVSACY5USOWT/graph.json","events_json":"https://pith.science/api/pith-number/SKTRFT5LRD5AX5SVSACY5USOWT/events.json","paper":"https://pith.science/paper/SKTRFT5L"},"agent_actions":{"view_html":"https://pith.science/pith/SKTRFT5LRD5AX5SVSACY5USOWT","download_json":"https://pith.science/pith/SKTRFT5LRD5AX5SVSACY5USOWT.json","view_paper":"https://pith.science/paper/SKTRFT5L","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=quant-ph/0701019&json=true","fetch_graph":"https://pith.science/api/pith-number/SKTRFT5LRD5AX5SVSACY5USOWT/graph.json","fetch_events":"https://pith.science/api/pith-number/SKTRFT5LRD5AX5SVSACY5USOWT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SKTRFT5LRD5AX5SVSACY5USOWT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SKTRFT5LRD5AX5SVSACY5USOWT/action/storage_attestation","attest_author":"https://pith.science/pith/SKTRFT5LRD5AX5SVSACY5USOWT/action/author_attestation","sign_citation":"https://pith.science/pith/SKTRFT5LRD5AX5SVSACY5USOWT/action/citation_signature","submit_replication":"https://pith.science/pith/SKTRFT5LRD5AX5SVSACY5USOWT/action/replication_record"}},"created_at":"2026-05-18T01:37:53.609931+00:00","updated_at":"2026-05-18T01:37:53.609931+00:00"}