{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:X3G7EU4F27Z55L4WUXQ6U6N4TE","short_pith_number":"pith:X3G7EU4F","canonical_record":{"source":{"id":"2502.12954","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-02-18T15:36:37Z","cross_cats_sorted":["gr-qc","physics.atom-ph"],"title_canon_sha256":"9b24efd494a593e0af835b551ece6d82cf73dec115148dae2b47d05a2988eeec","abstract_canon_sha256":"24226187d5104b998a7b4f74b4fa858c5a5ce0d5eec967f34f90f12d7276056f"},"schema_version":"1.0"},"canonical_sha256":"becdf25385d7f3deaf96a5e1ea79bc99049e482c576bd916f2cb55e2aaae01b7","source":{"kind":"arxiv","id":"2502.12954","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.12954","created_at":"2026-07-05T11:40:33Z"},{"alias_kind":"arxiv_version","alias_value":"2502.12954v1","created_at":"2026-07-05T11:40:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.12954","created_at":"2026-07-05T11:40:33Z"},{"alias_kind":"pith_short_12","alias_value":"X3G7EU4F27Z5","created_at":"2026-07-05T11:40:33Z"},{"alias_kind":"pith_short_16","alias_value":"X3G7EU4F27Z55L4W","created_at":"2026-07-05T11:40:33Z"},{"alias_kind":"pith_short_8","alias_value":"X3G7EU4F","created_at":"2026-07-05T11:40:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:X3G7EU4F27Z55L4WUXQ6U6N4TE","target":"record","payload":{"canonical_record":{"source":{"id":"2502.12954","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-02-18T15:36:37Z","cross_cats_sorted":["gr-qc","physics.atom-ph"],"title_canon_sha256":"9b24efd494a593e0af835b551ece6d82cf73dec115148dae2b47d05a2988eeec","abstract_canon_sha256":"24226187d5104b998a7b4f74b4fa858c5a5ce0d5eec967f34f90f12d7276056f"},"schema_version":"1.0"},"canonical_sha256":"becdf25385d7f3deaf96a5e1ea79bc99049e482c576bd916f2cb55e2aaae01b7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:40:33.083939Z","signature_b64":"wQU62ejOlseooWgykcJcR6FNduEN/kUiiwa4kE8jHIHJkT7ZGAi1xaP7e3Plpvmu8H5hMVjes7FBK0zoLPXTAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"becdf25385d7f3deaf96a5e1ea79bc99049e482c576bd916f2cb55e2aaae01b7","last_reissued_at":"2026-07-05T11:40:33.083445Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:40:33.083445Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2502.12954","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":"2026-07-05T11:40:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NqTFcbkDJZ+PCbFd1J6DptCuSPFWwom8sycQndNyrQAzfoJdg1rDGPAE9BfhR2jopiQ+eFVLkXTTdp+5W5wbCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T08:54:54.785370Z"},"content_sha256":"0171c64e6a7a1693ad16070945fa487ff67944bd5559432e3cd648cabd5efe47","schema_version":"1.0","event_id":"sha256:0171c64e6a7a1693ad16070945fa487ff67944bd5559432e3cd648cabd5efe47"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:X3G7EU4F27Z55L4WUXQ6U6N4TE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing curved spacetime with a distributed atomic processor clock","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc","physics.atom-ph"],"primary_cat":"quant-ph","authors_text":"Igor Pikovski, Jacob P. Covey, Johannes Borregaard","submitted_at":"2025-02-18T15:36:37Z","abstract_excerpt":"Quantum dynamics on curved spacetime has never been directly probed beyond the Newtonian limit. Although we can describe such dynamics theoretically, experiments would provide empirical evidence that quantum theory holds even in this extreme limit. The practical challenge is the minute spacetime curvature difference over the length scale of the typical extent of quantum effects. Here we propose a quantum network of alkaline earth(-like) atomic processors for constructing a distributed quantum state that is sensitive to the differential proper time between its constituent atomic processor nodes"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.12954","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2502.12954/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":"2026-07-05T11:40:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FYiuemTRFoDGgyN0eatXqo9iYLEbIiRCDjaMumvrlgdcWGiida4diLMD3PGeS/7SWDmlN2x521E/xXiBi5cYAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T08:54:54.785846Z"},"content_sha256":"2ebb9ef440c81ebbb5c2083c4ae3201e76ab5ee05d853c23891a305ea6fec401","schema_version":"1.0","event_id":"sha256:2ebb9ef440c81ebbb5c2083c4ae3201e76ab5ee05d853c23891a305ea6fec401"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X3G7EU4F27Z55L4WUXQ6U6N4TE/bundle.json","state_url":"https://pith.science/pith/X3G7EU4F27Z55L4WUXQ6U6N4TE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X3G7EU4F27Z55L4WUXQ6U6N4TE/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":"2026-08-04T08:54:54Z","links":{"resolver":"https://pith.science/pith/X3G7EU4F27Z55L4WUXQ6U6N4TE","bundle":"https://pith.science/pith/X3G7EU4F27Z55L4WUXQ6U6N4TE/bundle.json","state":"https://pith.science/pith/X3G7EU4F27Z55L4WUXQ6U6N4TE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X3G7EU4F27Z55L4WUXQ6U6N4TE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:X3G7EU4F27Z55L4WUXQ6U6N4TE","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":"24226187d5104b998a7b4f74b4fa858c5a5ce0d5eec967f34f90f12d7276056f","cross_cats_sorted":["gr-qc","physics.atom-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-02-18T15:36:37Z","title_canon_sha256":"9b24efd494a593e0af835b551ece6d82cf73dec115148dae2b47d05a2988eeec"},"schema_version":"1.0","source":{"id":"2502.12954","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.12954","created_at":"2026-07-05T11:40:33Z"},{"alias_kind":"arxiv_version","alias_value":"2502.12954v1","created_at":"2026-07-05T11:40:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.12954","created_at":"2026-07-05T11:40:33Z"},{"alias_kind":"pith_short_12","alias_value":"X3G7EU4F27Z5","created_at":"2026-07-05T11:40:33Z"},{"alias_kind":"pith_short_16","alias_value":"X3G7EU4F27Z55L4W","created_at":"2026-07-05T11:40:33Z"},{"alias_kind":"pith_short_8","alias_value":"X3G7EU4F","created_at":"2026-07-05T11:40:33Z"}],"graph_snapshots":[{"event_id":"sha256:2ebb9ef440c81ebbb5c2083c4ae3201e76ab5ee05d853c23891a305ea6fec401","target":"graph","created_at":"2026-07-05T11:40:33Z","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/2502.12954/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum dynamics on curved spacetime has never been directly probed beyond the Newtonian limit. Although we can describe such dynamics theoretically, experiments would provide empirical evidence that quantum theory holds even in this extreme limit. The practical challenge is the minute spacetime curvature difference over the length scale of the typical extent of quantum effects. Here we propose a quantum network of alkaline earth(-like) atomic processors for constructing a distributed quantum state that is sensitive to the differential proper time between its constituent atomic processor nodes","authors_text":"Igor Pikovski, Jacob P. Covey, Johannes Borregaard","cross_cats":["gr-qc","physics.atom-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-02-18T15:36:37Z","title":"Probing curved spacetime with a distributed atomic processor clock"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.12954","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":"sha256:0171c64e6a7a1693ad16070945fa487ff67944bd5559432e3cd648cabd5efe47","target":"record","created_at":"2026-07-05T11:40:33Z","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":"24226187d5104b998a7b4f74b4fa858c5a5ce0d5eec967f34f90f12d7276056f","cross_cats_sorted":["gr-qc","physics.atom-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-02-18T15:36:37Z","title_canon_sha256":"9b24efd494a593e0af835b551ece6d82cf73dec115148dae2b47d05a2988eeec"},"schema_version":"1.0","source":{"id":"2502.12954","kind":"arxiv","version":1}},"canonical_sha256":"becdf25385d7f3deaf96a5e1ea79bc99049e482c576bd916f2cb55e2aaae01b7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"becdf25385d7f3deaf96a5e1ea79bc99049e482c576bd916f2cb55e2aaae01b7","first_computed_at":"2026-07-05T11:40:33.083445Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:40:33.083445Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wQU62ejOlseooWgykcJcR6FNduEN/kUiiwa4kE8jHIHJkT7ZGAi1xaP7e3Plpvmu8H5hMVjes7FBK0zoLPXTAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:40:33.083939Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.12954","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0171c64e6a7a1693ad16070945fa487ff67944bd5559432e3cd648cabd5efe47","sha256:2ebb9ef440c81ebbb5c2083c4ae3201e76ab5ee05d853c23891a305ea6fec401"],"state_sha256":"63a379b5f9baea5feef4cd90d8a9b4b57b31ed755106b8bf93c88605b9ee19b8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9XeSFgA1nH8zhVYvwhiUiQwjAqywxRwxNUAp1SZXH037VLVwXJi93W2kwyiSlw49X46J1ZDwrNdJgsAJMef2DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T08:54:54.789290Z","bundle_sha256":"fa5a6a643f5241fe64257890a20c7a77c4681229062addb6528936f11df298bb"}}