{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:GXF2XZOTEPU3LB3NZDNHGELUMJ","short_pith_number":"pith:GXF2XZOT","canonical_record":{"source":{"id":"2507.21211","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-07-28T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"1508e90c1ba2f5aa5cc62b29a568af249ede6b0244f567093421b3d16f11fe8a","abstract_canon_sha256":"2700b47e08d1d4e33fc5cb05d39994c56361e40660c284964eb6a443bf81a8a6"},"schema_version":"1.0"},"canonical_sha256":"35cbabe5d323e9b5876dc8da731174626d741eafbe81f14d8c43a03cc00b7fc4","source":{"kind":"arxiv","id":"2507.21211","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.21211","created_at":"2026-07-05T11:44:54Z"},{"alias_kind":"arxiv_version","alias_value":"2507.21211v1","created_at":"2026-07-05T11:44:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.21211","created_at":"2026-07-05T11:44:54Z"},{"alias_kind":"pith_short_12","alias_value":"GXF2XZOTEPU3","created_at":"2026-07-05T11:44:54Z"},{"alias_kind":"pith_short_16","alias_value":"GXF2XZOTEPU3LB3N","created_at":"2026-07-05T11:44:54Z"},{"alias_kind":"pith_short_8","alias_value":"GXF2XZOT","created_at":"2026-07-05T11:44:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:GXF2XZOTEPU3LB3NZDNHGELUMJ","target":"record","payload":{"canonical_record":{"source":{"id":"2507.21211","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-07-28T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"1508e90c1ba2f5aa5cc62b29a568af249ede6b0244f567093421b3d16f11fe8a","abstract_canon_sha256":"2700b47e08d1d4e33fc5cb05d39994c56361e40660c284964eb6a443bf81a8a6"},"schema_version":"1.0"},"canonical_sha256":"35cbabe5d323e9b5876dc8da731174626d741eafbe81f14d8c43a03cc00b7fc4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:44:54.574205Z","signature_b64":"VLgVhPwH/ufHEEiD3apmGI6qUuFkl72GtkzNP3sI4LIw4zlGGqK7tJ3/NOBEeaoIYkSyJJ3H8441gEkIhVbcBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"35cbabe5d323e9b5876dc8da731174626d741eafbe81f14d8c43a03cc00b7fc4","last_reissued_at":"2026-07-05T11:44:54.573730Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:44:54.573730Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.21211","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":"2026-07-05T11:44:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Uufvu7zuAcTflXCrJNnApmrOp+1EDW+kpabmXZSnsjfmrDlQhQJMLA/IXQ8TpPl5UWrd039tKfQTDuiexi+EDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T12:24:09.300992Z"},"content_sha256":"a6cb49f431f735501758d9a9c284966440d31f4d53b5e87700fe89f0bb99e320","schema_version":"1.0","event_id":"sha256:a6cb49f431f735501758d9a9c284966440d31f4d53b5e87700fe89f0bb99e320"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:GXF2XZOTEPU3LB3NZDNHGELUMJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing quantum mechanics using nanoparticle Schr\\\"odinger cats","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Bruno E. Ram\\'irez-Galindo, Klaus Hornberger, Markus Arndt, Richard Ferstl, Sebastian Pedalino, Stefan Gerlich","submitted_at":"2025-07-28T18:00:01Z","abstract_excerpt":"The quantum superposition principle is a cornerstone of physics and at the heart of many quantum technologies. Yet, it is still often regarded counterintuitive because we do not observe its key features on the macroscopic scales of our daily lives. It is therefore intriguing to ask how quantum properties persist or change as we increase the size and complexity of objects. A paradigmatic test for this question can be realized by matter-wave interferometry, where the motion of individual massive particles becomes delocalized and needs to be described by a wave function that spans regions far lar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.21211","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/2507.21211/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":"2026-07-05T11:44:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bp9Toalc5bLfVZVTy6ld85zdirVmbD8dIJKYh+S0Kas6ZsVtXldO3NINIkq8DYaQfUimYzD8OPxtgYJXsaL2DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T12:24:09.301509Z"},"content_sha256":"7611349258eb0d1d8ceba157e28c8c56b00362a0c1c3e341f11a63fba6fd4ae3","schema_version":"1.0","event_id":"sha256:7611349258eb0d1d8ceba157e28c8c56b00362a0c1c3e341f11a63fba6fd4ae3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GXF2XZOTEPU3LB3NZDNHGELUMJ/bundle.json","state_url":"https://pith.science/pith/GXF2XZOTEPU3LB3NZDNHGELUMJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GXF2XZOTEPU3LB3NZDNHGELUMJ/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":"2026-08-12T12:24:09Z","links":{"resolver":"https://pith.science/pith/GXF2XZOTEPU3LB3NZDNHGELUMJ","bundle":"https://pith.science/pith/GXF2XZOTEPU3LB3NZDNHGELUMJ/bundle.json","state":"https://pith.science/pith/GXF2XZOTEPU3LB3NZDNHGELUMJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GXF2XZOTEPU3LB3NZDNHGELUMJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:GXF2XZOTEPU3LB3NZDNHGELUMJ","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":"2700b47e08d1d4e33fc5cb05d39994c56361e40660c284964eb6a443bf81a8a6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-07-28T18:00:01Z","title_canon_sha256":"1508e90c1ba2f5aa5cc62b29a568af249ede6b0244f567093421b3d16f11fe8a"},"schema_version":"1.0","source":{"id":"2507.21211","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.21211","created_at":"2026-07-05T11:44:54Z"},{"alias_kind":"arxiv_version","alias_value":"2507.21211v1","created_at":"2026-07-05T11:44:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.21211","created_at":"2026-07-05T11:44:54Z"},{"alias_kind":"pith_short_12","alias_value":"GXF2XZOTEPU3","created_at":"2026-07-05T11:44:54Z"},{"alias_kind":"pith_short_16","alias_value":"GXF2XZOTEPU3LB3N","created_at":"2026-07-05T11:44:54Z"},{"alias_kind":"pith_short_8","alias_value":"GXF2XZOT","created_at":"2026-07-05T11:44:54Z"}],"graph_snapshots":[{"event_id":"sha256:7611349258eb0d1d8ceba157e28c8c56b00362a0c1c3e341f11a63fba6fd4ae3","target":"graph","created_at":"2026-07-05T11:44:54Z","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/2507.21211/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The quantum superposition principle is a cornerstone of physics and at the heart of many quantum technologies. Yet, it is still often regarded counterintuitive because we do not observe its key features on the macroscopic scales of our daily lives. It is therefore intriguing to ask how quantum properties persist or change as we increase the size and complexity of objects. A paradigmatic test for this question can be realized by matter-wave interferometry, where the motion of individual massive particles becomes delocalized and needs to be described by a wave function that spans regions far lar","authors_text":"Bruno E. Ram\\'irez-Galindo, Klaus Hornberger, Markus Arndt, Richard Ferstl, Sebastian Pedalino, Stefan Gerlich","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-07-28T18:00:01Z","title":"Probing quantum mechanics using nanoparticle Schr\\\"odinger cats"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.21211","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:a6cb49f431f735501758d9a9c284966440d31f4d53b5e87700fe89f0bb99e320","target":"record","created_at":"2026-07-05T11:44:54Z","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":"2700b47e08d1d4e33fc5cb05d39994c56361e40660c284964eb6a443bf81a8a6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-07-28T18:00:01Z","title_canon_sha256":"1508e90c1ba2f5aa5cc62b29a568af249ede6b0244f567093421b3d16f11fe8a"},"schema_version":"1.0","source":{"id":"2507.21211","kind":"arxiv","version":1}},"canonical_sha256":"35cbabe5d323e9b5876dc8da731174626d741eafbe81f14d8c43a03cc00b7fc4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"35cbabe5d323e9b5876dc8da731174626d741eafbe81f14d8c43a03cc00b7fc4","first_computed_at":"2026-07-05T11:44:54.573730Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:44:54.573730Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VLgVhPwH/ufHEEiD3apmGI6qUuFkl72GtkzNP3sI4LIw4zlGGqK7tJ3/NOBEeaoIYkSyJJ3H8441gEkIhVbcBA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:44:54.574205Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.21211","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a6cb49f431f735501758d9a9c284966440d31f4d53b5e87700fe89f0bb99e320","sha256:7611349258eb0d1d8ceba157e28c8c56b00362a0c1c3e341f11a63fba6fd4ae3"],"state_sha256":"871380e5b9be895be429ec28a9bf7417f35d234d9322852f05e6c42e851c639d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cc4n4St4714pLW/uhqwrH4vVRTD4/gXzEJVDzSUz/Nna+4bAEMSnEkKMp9jiwuSijq7sUcSBU2+mX9Jn0T9BCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T12:24:09.305378Z","bundle_sha256":"3391254cf365dd6f15b856ab0a6aa35c7c6776f63265b16ef74ce076f5b9ef75"}}