{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:HAU3YAFGZLQE6T364IVBF37AGJ","short_pith_number":"pith:HAU3YAFG","canonical_record":{"source":{"id":"2303.07959","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-03-14T15:00:55Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"23aa87a5aae253b088de14b4715683d6833f4f0d257d56b427fae3561211b770","abstract_canon_sha256":"42137a076f457fed222e7a6d9bddfb10fb6a5e445b79f22d11d48fac931071fc"},"schema_version":"1.0"},"canonical_sha256":"3829bc00a6cae04f4f7ee22a12efe03265e2551a223456bdfaa67171bfa76b47","source":{"kind":"arxiv","id":"2303.07959","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.07959","created_at":"2026-07-05T07:32:56Z"},{"alias_kind":"arxiv_version","alias_value":"2303.07959v3","created_at":"2026-07-05T07:32:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.07959","created_at":"2026-07-05T07:32:56Z"},{"alias_kind":"pith_short_12","alias_value":"HAU3YAFGZLQE","created_at":"2026-07-05T07:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"HAU3YAFGZLQE6T36","created_at":"2026-07-05T07:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"HAU3YAFG","created_at":"2026-07-05T07:32:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:HAU3YAFGZLQE6T364IVBF37AGJ","target":"record","payload":{"canonical_record":{"source":{"id":"2303.07959","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-03-14T15:00:55Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"23aa87a5aae253b088de14b4715683d6833f4f0d257d56b427fae3561211b770","abstract_canon_sha256":"42137a076f457fed222e7a6d9bddfb10fb6a5e445b79f22d11d48fac931071fc"},"schema_version":"1.0"},"canonical_sha256":"3829bc00a6cae04f4f7ee22a12efe03265e2551a223456bdfaa67171bfa76b47","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:32:56.874357Z","signature_b64":"JKEkB8SP+CABy6zaPgzEjesXkUgQBmjvJXVTYwl2SiJ2lapO8TuBpFS0CB2+m9HcxlIB06LiSQQ2qGXCwRGVDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3829bc00a6cae04f4f7ee22a12efe03265e2551a223456bdfaa67171bfa76b47","last_reissued_at":"2026-07-05T07:32:56.873894Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:32:56.873894Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.07959","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T07:32:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IH5CQUrhoY29dJ48/F036KJdhtZqQbS8IGAJpjoN0blAGkAkNEgyjI7fWcr7nAbNlgm4vE6/FT8dxC04MQA5Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T04:03:29.323219Z"},"content_sha256":"4cbadbe756b8fe281e79c07241f4717348182a4d9cad620ea0894d8913d8460d","schema_version":"1.0","event_id":"sha256:4cbadbe756b8fe281e79c07241f4717348182a4d9cad620ea0894d8913d8460d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:HAU3YAFGZLQE6T364IVBF37AGJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Macroscopic Quantum Superpositions via Dynamics in a Wide Double-Well Potential","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"quant-ph","authors_text":"Andreu Riera-Campeny, Davide Candoli, Marc Roda-Llordes, Oriol Romero-Isart, Piotr T. Grochowski","submitted_at":"2023-03-14T15:00:55Z","abstract_excerpt":"We present an experimental proposal for the rapid preparation of the center of mass of a levitated particle in a macroscopic quantum state, that is a state delocalized over a length scale much larger than its zero-point motion and that has no classical analog. This state is prepared by letting the particle evolve in a static double-well potential after a sudden switchoff of the harmonic trap, following initial center-of-mass cooling to a sufficiently pure quantum state. We provide a thorough analysis of the noise and decoherence that is relevant to current experiments with levitated nano- and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.07959","kind":"arxiv","version":3},"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/2303.07959/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":"2026-07-05T07:32:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0flFyotYKNh5+nUx9ZSPW/s8FS7hz2t7ELOyGorkalQnrNffAB9gohX2fOWQ6raTTs+cvXPW+F3GE0yaUM5dAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T04:03:29.323724Z"},"content_sha256":"9c6ee83d27c9da1014f4eac11b6ca21c90ae373ac62a8e07163e0cf2d65c2e8d","schema_version":"1.0","event_id":"sha256:9c6ee83d27c9da1014f4eac11b6ca21c90ae373ac62a8e07163e0cf2d65c2e8d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HAU3YAFGZLQE6T364IVBF37AGJ/bundle.json","state_url":"https://pith.science/pith/HAU3YAFGZLQE6T364IVBF37AGJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HAU3YAFGZLQE6T364IVBF37AGJ/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":"2026-08-20T04:03:29Z","links":{"resolver":"https://pith.science/pith/HAU3YAFGZLQE6T364IVBF37AGJ","bundle":"https://pith.science/pith/HAU3YAFGZLQE6T364IVBF37AGJ/bundle.json","state":"https://pith.science/pith/HAU3YAFGZLQE6T364IVBF37AGJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HAU3YAFGZLQE6T364IVBF37AGJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:HAU3YAFGZLQE6T364IVBF37AGJ","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":"42137a076f457fed222e7a6d9bddfb10fb6a5e445b79f22d11d48fac931071fc","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-03-14T15:00:55Z","title_canon_sha256":"23aa87a5aae253b088de14b4715683d6833f4f0d257d56b427fae3561211b770"},"schema_version":"1.0","source":{"id":"2303.07959","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.07959","created_at":"2026-07-05T07:32:56Z"},{"alias_kind":"arxiv_version","alias_value":"2303.07959v3","created_at":"2026-07-05T07:32:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.07959","created_at":"2026-07-05T07:32:56Z"},{"alias_kind":"pith_short_12","alias_value":"HAU3YAFGZLQE","created_at":"2026-07-05T07:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"HAU3YAFGZLQE6T36","created_at":"2026-07-05T07:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"HAU3YAFG","created_at":"2026-07-05T07:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:9c6ee83d27c9da1014f4eac11b6ca21c90ae373ac62a8e07163e0cf2d65c2e8d","target":"graph","created_at":"2026-07-05T07:32:56Z","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/2303.07959/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an experimental proposal for the rapid preparation of the center of mass of a levitated particle in a macroscopic quantum state, that is a state delocalized over a length scale much larger than its zero-point motion and that has no classical analog. This state is prepared by letting the particle evolve in a static double-well potential after a sudden switchoff of the harmonic trap, following initial center-of-mass cooling to a sufficiently pure quantum state. We provide a thorough analysis of the noise and decoherence that is relevant to current experiments with levitated nano- and ","authors_text":"Andreu Riera-Campeny, Davide Candoli, Marc Roda-Llordes, Oriol Romero-Isart, Piotr T. Grochowski","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-03-14T15:00:55Z","title":"Macroscopic Quantum Superpositions via Dynamics in a Wide Double-Well Potential"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.07959","kind":"arxiv","version":3},"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":"sha256:4cbadbe756b8fe281e79c07241f4717348182a4d9cad620ea0894d8913d8460d","target":"record","created_at":"2026-07-05T07:32:56Z","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":"42137a076f457fed222e7a6d9bddfb10fb6a5e445b79f22d11d48fac931071fc","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-03-14T15:00:55Z","title_canon_sha256":"23aa87a5aae253b088de14b4715683d6833f4f0d257d56b427fae3561211b770"},"schema_version":"1.0","source":{"id":"2303.07959","kind":"arxiv","version":3}},"canonical_sha256":"3829bc00a6cae04f4f7ee22a12efe03265e2551a223456bdfaa67171bfa76b47","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3829bc00a6cae04f4f7ee22a12efe03265e2551a223456bdfaa67171bfa76b47","first_computed_at":"2026-07-05T07:32:56.873894Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:32:56.873894Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JKEkB8SP+CABy6zaPgzEjesXkUgQBmjvJXVTYwl2SiJ2lapO8TuBpFS0CB2+m9HcxlIB06LiSQQ2qGXCwRGVDw==","signature_status":"signed_v1","signed_at":"2026-07-05T07:32:56.874357Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.07959","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4cbadbe756b8fe281e79c07241f4717348182a4d9cad620ea0894d8913d8460d","sha256:9c6ee83d27c9da1014f4eac11b6ca21c90ae373ac62a8e07163e0cf2d65c2e8d"],"state_sha256":"efa87eb4456832f4c82554fde6663a2f3ab1d88be2d0c049ef8d72911eb9b153"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hu/rHm+/SRFc9Khhc6Y5C40bsbjtwkDlEKWcWZVSGzolQFpS4VadOT1HGy/XhcBlchZbGvQ+FUTxtH1kZYbCCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T04:03:29.327258Z","bundle_sha256":"aa0cd3540363d98f29c4dfbcc0b181f1dc210fde328eb05826827c82f5300601"}}