{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:UDR5P5XWEF3TXNJFN4VTLOJH6M","short_pith_number":"pith:UDR5P5XW","canonical_record":{"source":{"id":"1905.09682","kind":"arxiv","version":5},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-05-23T14:30:52Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"37addbc7444c04e2053a71945095a995bdeae2440012c0247550a31d18187ad7","abstract_canon_sha256":"728dbdf82968a626b0545e68d6d8b9aa6299b01c69a5a447959888955a2cdb27"},"schema_version":"1.0"},"canonical_sha256":"a0e3d7f6f621773bb5256f2b35b927f33df6ec76325a3d0d86491bbc1ed7503c","source":{"kind":"arxiv","id":"1905.09682","version":5},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.09682","created_at":"2026-07-05T01:08:09Z"},{"alias_kind":"arxiv_version","alias_value":"1905.09682v5","created_at":"2026-07-05T01:08:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.09682","created_at":"2026-07-05T01:08:09Z"},{"alias_kind":"pith_short_12","alias_value":"UDR5P5XWEF3T","created_at":"2026-07-05T01:08:09Z"},{"alias_kind":"pith_short_16","alias_value":"UDR5P5XWEF3TXNJF","created_at":"2026-07-05T01:08:09Z"},{"alias_kind":"pith_short_8","alias_value":"UDR5P5XW","created_at":"2026-07-05T01:08:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:UDR5P5XWEF3TXNJFN4VTLOJH6M","target":"record","payload":{"canonical_record":{"source":{"id":"1905.09682","kind":"arxiv","version":5},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-05-23T14:30:52Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"37addbc7444c04e2053a71945095a995bdeae2440012c0247550a31d18187ad7","abstract_canon_sha256":"728dbdf82968a626b0545e68d6d8b9aa6299b01c69a5a447959888955a2cdb27"},"schema_version":"1.0"},"canonical_sha256":"a0e3d7f6f621773bb5256f2b35b927f33df6ec76325a3d0d86491bbc1ed7503c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:08:09.587389Z","signature_b64":"noUWejSrcNeXcgdobd3sQN+2i8kyNfU2JzFw3QGD48JTafZp0Z8N/DrEDLIP3JkbWtouAX3wwlag422leFTVAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a0e3d7f6f621773bb5256f2b35b927f33df6ec76325a3d0d86491bbc1ed7503c","last_reissued_at":"2026-07-05T01:08:09.586920Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:08:09.586920Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.09682","source_version":5,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:08:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LRFaFUJ871jogu4I8mTiPFQgdisDoBLN3VsuKKENskRRV5A0hf7IlHpq4AzUkHxvQfKSlPr+N/TSC4FRugz+Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T14:10:47.696001Z"},"content_sha256":"b2092eb320b13dfc3b8b3181dbd29c68984d94b66deefacef9cbbd2ac7b8a4d1","schema_version":"1.0","event_id":"sha256:b2092eb320b13dfc3b8b3181dbd29c68984d94b66deefacef9cbbd2ac7b8a4d1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:UDR5P5XWEF3TXNJFN4VTLOJH6M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Causal orders, quantum circuits and spacetime: distinguishing between definite and superposed causal orders","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"quant-ph","authors_text":"Marko Vojinovic, Nikola Paunkovic","submitted_at":"2019-05-23T14:30:52Z","abstract_excerpt":"We study the notion of causal orders for the cases of (classical and quantum) circuits and spacetime events. We show that every circuit can be immersed into a classical spacetime, preserving the compatibility between the two causal structures. Using the process matrix formalism, we analyse the realisations of the quantum switch using 4 and 3 spacetime events in classical spacetimes with fixed causal orders, and the realisation of a gravitational switch with only 2 spacetime events that features superpositions of different gravitational field configurations and their respective causal orders. W"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.09682","kind":"arxiv","version":5},"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/1905.09682/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:08:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EyX49voxWbt0sGShl14PW8Tntir/IDbX1DrHKW5tZ5dSL+ky39YK56OsY3O3C8UeACZT1WaG0eRw6FPRHAapDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T14:10:47.696910Z"},"content_sha256":"229f36984818fdbf3f9490746973f8fb8106c771986178c37736764b6823f458","schema_version":"1.0","event_id":"sha256:229f36984818fdbf3f9490746973f8fb8106c771986178c37736764b6823f458"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UDR5P5XWEF3TXNJFN4VTLOJH6M/bundle.json","state_url":"https://pith.science/pith/UDR5P5XWEF3TXNJFN4VTLOJH6M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UDR5P5XWEF3TXNJFN4VTLOJH6M/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":"2026-08-07T14:10:47Z","links":{"resolver":"https://pith.science/pith/UDR5P5XWEF3TXNJFN4VTLOJH6M","bundle":"https://pith.science/pith/UDR5P5XWEF3TXNJFN4VTLOJH6M/bundle.json","state":"https://pith.science/pith/UDR5P5XWEF3TXNJFN4VTLOJH6M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UDR5P5XWEF3TXNJFN4VTLOJH6M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:UDR5P5XWEF3TXNJFN4VTLOJH6M","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":"728dbdf82968a626b0545e68d6d8b9aa6299b01c69a5a447959888955a2cdb27","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-05-23T14:30:52Z","title_canon_sha256":"37addbc7444c04e2053a71945095a995bdeae2440012c0247550a31d18187ad7"},"schema_version":"1.0","source":{"id":"1905.09682","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.09682","created_at":"2026-07-05T01:08:09Z"},{"alias_kind":"arxiv_version","alias_value":"1905.09682v5","created_at":"2026-07-05T01:08:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.09682","created_at":"2026-07-05T01:08:09Z"},{"alias_kind":"pith_short_12","alias_value":"UDR5P5XWEF3T","created_at":"2026-07-05T01:08:09Z"},{"alias_kind":"pith_short_16","alias_value":"UDR5P5XWEF3TXNJF","created_at":"2026-07-05T01:08:09Z"},{"alias_kind":"pith_short_8","alias_value":"UDR5P5XW","created_at":"2026-07-05T01:08:09Z"}],"graph_snapshots":[{"event_id":"sha256:229f36984818fdbf3f9490746973f8fb8106c771986178c37736764b6823f458","target":"graph","created_at":"2026-07-05T01:08:09Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1905.09682/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study the notion of causal orders for the cases of (classical and quantum) circuits and spacetime events. We show that every circuit can be immersed into a classical spacetime, preserving the compatibility between the two causal structures. Using the process matrix formalism, we analyse the realisations of the quantum switch using 4 and 3 spacetime events in classical spacetimes with fixed causal orders, and the realisation of a gravitational switch with only 2 spacetime events that features superpositions of different gravitational field configurations and their respective causal orders. W","authors_text":"Marko Vojinovic, Nikola Paunkovic","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-05-23T14:30:52Z","title":"Causal orders, quantum circuits and spacetime: distinguishing between definite and superposed causal orders"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.09682","kind":"arxiv","version":5},"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:b2092eb320b13dfc3b8b3181dbd29c68984d94b66deefacef9cbbd2ac7b8a4d1","target":"record","created_at":"2026-07-05T01:08:09Z","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":"728dbdf82968a626b0545e68d6d8b9aa6299b01c69a5a447959888955a2cdb27","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-05-23T14:30:52Z","title_canon_sha256":"37addbc7444c04e2053a71945095a995bdeae2440012c0247550a31d18187ad7"},"schema_version":"1.0","source":{"id":"1905.09682","kind":"arxiv","version":5}},"canonical_sha256":"a0e3d7f6f621773bb5256f2b35b927f33df6ec76325a3d0d86491bbc1ed7503c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a0e3d7f6f621773bb5256f2b35b927f33df6ec76325a3d0d86491bbc1ed7503c","first_computed_at":"2026-07-05T01:08:09.586920Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:08:09.586920Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"noUWejSrcNeXcgdobd3sQN+2i8kyNfU2JzFw3QGD48JTafZp0Z8N/DrEDLIP3JkbWtouAX3wwlag422leFTVAg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:08:09.587389Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.09682","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b2092eb320b13dfc3b8b3181dbd29c68984d94b66deefacef9cbbd2ac7b8a4d1","sha256:229f36984818fdbf3f9490746973f8fb8106c771986178c37736764b6823f458"],"state_sha256":"f768bb759aeab320f5bf3222defd28a94d8fa81a2b0e1e27d3a98c28dbf58c52"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SVGXSD+PXjETe97JO/gaSa5LhZ7Sx/PK6cuRRwKnieSqQXLTUAUY05YZxf9ObL/CM3nMn2qAojOfKOGBcLlFCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T14:10:47.704380Z","bundle_sha256":"d973e75d77dc91dce428773c5f6b0dbfe25eb1fa42b8009b68f7fe0fb771035f"}}