{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:DHUY65Q375VD6LWIWBK3GWOMIK","short_pith_number":"pith:DHUY65Q3","schema_version":"1.0","canonical_sha256":"19e98f761bff6a3f2ec8b055b359cc42bd3019c4b70633f558464ea78cb16ff6","source":{"kind":"arxiv","id":"0905.1467","version":1},"attestation_state":"computed","paper":{"title":"Classical behavior in quantum systems: the case of straight tracks in a cloud chamber","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.MP","physics.hist-ph","quant-ph"],"primary_cat":"math-ph","authors_text":"Alessandro Teta","submitted_at":"2009-05-10T11:29:11Z","abstract_excerpt":"The aim of this review is to discuss in a pedagogical way the problem of the emergence of a classical behavior in certain physical systems which, in principle, are correctly described by quantum mechanics. It is stressed that the limit $\\hbar \\to 0$ is not sufficient and the crucial role played by the environment must be taken into account. In particular it is recalled the old problem raised by Mott in 1929 (\\cite{m}) concerning the straight tracks observed in a cloud chamber, produced by an $\\alpha$-particle emitted by a source in the form of a spherical wave. The conceptual relevance of the "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0905.1467","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2009-05-10T11:29:11Z","cross_cats_sorted":["math.MP","physics.hist-ph","quant-ph"],"title_canon_sha256":"b844e996ec3634641ebd177b2f1f0d4710c1baac234a952d569ed1fa718b55f7","abstract_canon_sha256":"42f71c80ff6d8f016f794c1eecb25c83850fbcbc00aec08403284b4c4c89d65e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:46.046494Z","signature_b64":"IPHPxPz/oUBT4SijH9W9SiJbONLa6UO435YEsrVKEJcVUCq0HEu/Kj8aoSzuRi64ZTUOkq4eBdWSSI+sUG74Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"19e98f761bff6a3f2ec8b055b359cc42bd3019c4b70633f558464ea78cb16ff6","last_reissued_at":"2026-05-18T02:13:46.045748Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:46.045748Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Classical behavior in quantum systems: the case of straight tracks in a cloud chamber","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.MP","physics.hist-ph","quant-ph"],"primary_cat":"math-ph","authors_text":"Alessandro Teta","submitted_at":"2009-05-10T11:29:11Z","abstract_excerpt":"The aim of this review is to discuss in a pedagogical way the problem of the emergence of a classical behavior in certain physical systems which, in principle, are correctly described by quantum mechanics. It is stressed that the limit $\\hbar \\to 0$ is not sufficient and the crucial role played by the environment must be taken into account. In particular it is recalled the old problem raised by Mott in 1929 (\\cite{m}) concerning the straight tracks observed in a cloud chamber, produced by an $\\alpha$-particle emitted by a source in the form of a spherical wave. The conceptual relevance of the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.1467","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0905.1467","created_at":"2026-05-18T02:13:46.045873+00:00"},{"alias_kind":"arxiv_version","alias_value":"0905.1467v1","created_at":"2026-05-18T02:13:46.045873+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.1467","created_at":"2026-05-18T02:13:46.045873+00:00"},{"alias_kind":"pith_short_12","alias_value":"DHUY65Q375VD","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_16","alias_value":"DHUY65Q375VD6LWI","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_8","alias_value":"DHUY65Q3","created_at":"2026-05-18T12:25:59.703012+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/DHUY65Q375VD6LWIWBK3GWOMIK","json":"https://pith.science/pith/DHUY65Q375VD6LWIWBK3GWOMIK.json","graph_json":"https://pith.science/api/pith-number/DHUY65Q375VD6LWIWBK3GWOMIK/graph.json","events_json":"https://pith.science/api/pith-number/DHUY65Q375VD6LWIWBK3GWOMIK/events.json","paper":"https://pith.science/paper/DHUY65Q3"},"agent_actions":{"view_html":"https://pith.science/pith/DHUY65Q375VD6LWIWBK3GWOMIK","download_json":"https://pith.science/pith/DHUY65Q375VD6LWIWBK3GWOMIK.json","view_paper":"https://pith.science/paper/DHUY65Q3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0905.1467&json=true","fetch_graph":"https://pith.science/api/pith-number/DHUY65Q375VD6LWIWBK3GWOMIK/graph.json","fetch_events":"https://pith.science/api/pith-number/DHUY65Q375VD6LWIWBK3GWOMIK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DHUY65Q375VD6LWIWBK3GWOMIK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DHUY65Q375VD6LWIWBK3GWOMIK/action/storage_attestation","attest_author":"https://pith.science/pith/DHUY65Q375VD6LWIWBK3GWOMIK/action/author_attestation","sign_citation":"https://pith.science/pith/DHUY65Q375VD6LWIWBK3GWOMIK/action/citation_signature","submit_replication":"https://pith.science/pith/DHUY65Q375VD6LWIWBK3GWOMIK/action/replication_record"}},"created_at":"2026-05-18T02:13:46.045873+00:00","updated_at":"2026-05-18T02:13:46.045873+00:00"}