{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:4NVV64K7XOVPIWV6QDNAL2SE7J","short_pith_number":"pith:4NVV64K7","canonical_record":{"source":{"id":"1908.11164","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-29T11:55:44Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"9fbe4108e49716da89135bd12cb8455863f7ed6095b4f85ade735a49ad3b31ac","abstract_canon_sha256":"27ddc74616110f6639f96b99c9615a0827727dbac8f07e2a3513d25b22c6c406"},"schema_version":"1.0"},"canonical_sha256":"e36b5f715fbbaaf45abe80da05ea44fa630344cb25971f175f4b6dc49f84f179","source":{"kind":"arxiv","id":"1908.11164","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.11164","created_at":"2026-07-05T01:26:05Z"},{"alias_kind":"arxiv_version","alias_value":"1908.11164v2","created_at":"2026-07-05T01:26:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.11164","created_at":"2026-07-05T01:26:05Z"},{"alias_kind":"pith_short_12","alias_value":"4NVV64K7XOVP","created_at":"2026-07-05T01:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"4NVV64K7XOVPIWV6","created_at":"2026-07-05T01:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"4NVV64K7","created_at":"2026-07-05T01:26:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:4NVV64K7XOVPIWV6QDNAL2SE7J","target":"record","payload":{"canonical_record":{"source":{"id":"1908.11164","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-29T11:55:44Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"9fbe4108e49716da89135bd12cb8455863f7ed6095b4f85ade735a49ad3b31ac","abstract_canon_sha256":"27ddc74616110f6639f96b99c9615a0827727dbac8f07e2a3513d25b22c6c406"},"schema_version":"1.0"},"canonical_sha256":"e36b5f715fbbaaf45abe80da05ea44fa630344cb25971f175f4b6dc49f84f179","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:26:05.413011Z","signature_b64":"JKm9YwUaXRK1OYjPURbLWDL8d5/6jl2wPg3RojHrc4NiQyFVynXdnvR0N01GyPy5PWdXSaKQQJdtz5AMmL55Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e36b5f715fbbaaf45abe80da05ea44fa630344cb25971f175f4b6dc49f84f179","last_reissued_at":"2026-07-05T01:26:05.412542Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:26:05.412542Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.11164","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:26:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ex8M7Ch6YsMnt9KPhzP2f/GryyIWNAJE1BdWZnnTomDgn1UyJFZmnIZ+uf2NKYyjWcjjJMpcw6zpmEmlyfQbCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T20:35:40.966337Z"},"content_sha256":"6a9abdc645a776d644caa4b2affe03a7e4cd140cb622ef4f9bf8994ea2207a25","schema_version":"1.0","event_id":"sha256:6a9abdc645a776d644caa4b2affe03a7e4cd140cb622ef4f9bf8994ea2207a25"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:4NVV64K7XOVPIWV6QDNAL2SE7J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On Quantum Gravity Tests with Composite Particles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"quant-ph","authors_text":"Martin B. Plenio, Shreya P. Kumar","submitted_at":"2019-08-29T11:55:44Z","abstract_excerpt":"Models of quantum gravity imply a fundamental revision of our description of position and momentum that manifests in modifications of the canonical commutation relations. Experimental tests of such modifications remain an outstanding challenge. These corrections scale with the mass of test particles, which motivates experiments using macroscopic composite particles. Here we consider a challenge to such tests, namely that quantum gravity corrections of canonical commutation relations are expected to be suppressed with increasing number of constituent particles. Since the precise scaling of this"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.11164","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/1908.11164/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":"2026-07-05T01:26:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mMIu05ATeT2hZQpJvht+EfPrsT+yTtUlQ7dm2AQdyG+t2LW7jiafJ3Vz9z0X2SicD7UGhha361JDYI0iHw+bDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T20:35:40.966714Z"},"content_sha256":"0925295086e0f0ad4f333086c7b0d0c2cb7e2be50b05ab82c25234cb8896422e","schema_version":"1.0","event_id":"sha256:0925295086e0f0ad4f333086c7b0d0c2cb7e2be50b05ab82c25234cb8896422e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4NVV64K7XOVPIWV6QDNAL2SE7J/bundle.json","state_url":"https://pith.science/pith/4NVV64K7XOVPIWV6QDNAL2SE7J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4NVV64K7XOVPIWV6QDNAL2SE7J/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":"2026-08-11T20:35:40Z","links":{"resolver":"https://pith.science/pith/4NVV64K7XOVPIWV6QDNAL2SE7J","bundle":"https://pith.science/pith/4NVV64K7XOVPIWV6QDNAL2SE7J/bundle.json","state":"https://pith.science/pith/4NVV64K7XOVPIWV6QDNAL2SE7J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4NVV64K7XOVPIWV6QDNAL2SE7J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:4NVV64K7XOVPIWV6QDNAL2SE7J","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":"27ddc74616110f6639f96b99c9615a0827727dbac8f07e2a3513d25b22c6c406","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-29T11:55:44Z","title_canon_sha256":"9fbe4108e49716da89135bd12cb8455863f7ed6095b4f85ade735a49ad3b31ac"},"schema_version":"1.0","source":{"id":"1908.11164","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.11164","created_at":"2026-07-05T01:26:05Z"},{"alias_kind":"arxiv_version","alias_value":"1908.11164v2","created_at":"2026-07-05T01:26:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.11164","created_at":"2026-07-05T01:26:05Z"},{"alias_kind":"pith_short_12","alias_value":"4NVV64K7XOVP","created_at":"2026-07-05T01:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"4NVV64K7XOVPIWV6","created_at":"2026-07-05T01:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"4NVV64K7","created_at":"2026-07-05T01:26:05Z"}],"graph_snapshots":[{"event_id":"sha256:0925295086e0f0ad4f333086c7b0d0c2cb7e2be50b05ab82c25234cb8896422e","target":"graph","created_at":"2026-07-05T01:26:05Z","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/1908.11164/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Models of quantum gravity imply a fundamental revision of our description of position and momentum that manifests in modifications of the canonical commutation relations. Experimental tests of such modifications remain an outstanding challenge. These corrections scale with the mass of test particles, which motivates experiments using macroscopic composite particles. Here we consider a challenge to such tests, namely that quantum gravity corrections of canonical commutation relations are expected to be suppressed with increasing number of constituent particles. Since the precise scaling of this","authors_text":"Martin B. Plenio, Shreya P. Kumar","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-29T11:55:44Z","title":"On Quantum Gravity Tests with Composite Particles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.11164","kind":"arxiv","version":2},"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":"sha256:6a9abdc645a776d644caa4b2affe03a7e4cd140cb622ef4f9bf8994ea2207a25","target":"record","created_at":"2026-07-05T01:26:05Z","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":"27ddc74616110f6639f96b99c9615a0827727dbac8f07e2a3513d25b22c6c406","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-29T11:55:44Z","title_canon_sha256":"9fbe4108e49716da89135bd12cb8455863f7ed6095b4f85ade735a49ad3b31ac"},"schema_version":"1.0","source":{"id":"1908.11164","kind":"arxiv","version":2}},"canonical_sha256":"e36b5f715fbbaaf45abe80da05ea44fa630344cb25971f175f4b6dc49f84f179","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e36b5f715fbbaaf45abe80da05ea44fa630344cb25971f175f4b6dc49f84f179","first_computed_at":"2026-07-05T01:26:05.412542Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:26:05.412542Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JKm9YwUaXRK1OYjPURbLWDL8d5/6jl2wPg3RojHrc4NiQyFVynXdnvR0N01GyPy5PWdXSaKQQJdtz5AMmL55Bw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:26:05.413011Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.11164","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6a9abdc645a776d644caa4b2affe03a7e4cd140cb622ef4f9bf8994ea2207a25","sha256:0925295086e0f0ad4f333086c7b0d0c2cb7e2be50b05ab82c25234cb8896422e"],"state_sha256":"241664a80ca2dde60641261b49b7976e070d29d6f6ffccdab06bece4eb03e5b6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9AUHbdjZHCcmN07CdSD3Ds1kfoM+Rf3N/VEDqlnHPUs8E2TX7v1wnACDoqsEXtY4q8j/Jn9zOIkh+e19842gBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T20:35:40.969191Z","bundle_sha256":"77f3cf36d24652e2b2797ee141ba0b2f75b85d2b151043d5a360f082858a78b5"}}