{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:QLURHVR2W4YSVZG5YHVNGL2LDQ","short_pith_number":"pith:QLURHVR2","schema_version":"1.0","canonical_sha256":"82e913d63ab7312ae4ddc1ead32f4b1c125f013294c48885be93875a85856edf","source":{"kind":"arxiv","id":"1903.02053","version":2},"attestation_state":"computed","paper":{"title":"Equivalence between quantum backflow and classically forbidden probability flow in a diffraction-in-time problem","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Arseni Goussev","submitted_at":"2019-03-05T21:07:53Z","abstract_excerpt":"Quantum backflow is an interference effect in which a matter-wave packet comprised of only plane waves with non-negative momenta exhibits negative probability flux. Here we show that this effect is mathematically equivalent to the appearance of classically-forbidden probability flux when a matter-wave packet, initially confined to a semi-infinite line, expands in free space."},"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":"1903.02053","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-05T21:07:53Z","cross_cats_sorted":[],"title_canon_sha256":"c4bb6fcc8288919d5f04718c01a65228c4d77bf86aa5f216dd8422ff2ded7a17","abstract_canon_sha256":"0396147bdcdbc882c2c432e1495498f7e87802c3be3deb4968f14b35f2967897"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:16.885789Z","signature_b64":"niV0N2D/S3f1O3fm1EeWi9JuZgAfgaCkVjIJ3XMvG2HqXRoJlW/K0DDezrRmrkx1PN5dwc4CBgnpJmDALTppCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"82e913d63ab7312ae4ddc1ead32f4b1c125f013294c48885be93875a85856edf","last_reissued_at":"2026-05-17T23:47:16.885408Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:16.885408Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Equivalence between quantum backflow and classically forbidden probability flow in a diffraction-in-time problem","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Arseni Goussev","submitted_at":"2019-03-05T21:07:53Z","abstract_excerpt":"Quantum backflow is an interference effect in which a matter-wave packet comprised of only plane waves with non-negative momenta exhibits negative probability flux. Here we show that this effect is mathematically equivalent to the appearance of classically-forbidden probability flux when a matter-wave packet, initially confined to a semi-infinite line, expands in free space."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.02053","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":""},"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":"1903.02053","created_at":"2026-05-17T23:47:16.885469+00:00"},{"alias_kind":"arxiv_version","alias_value":"1903.02053v2","created_at":"2026-05-17T23:47:16.885469+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.02053","created_at":"2026-05-17T23:47:16.885469+00:00"},{"alias_kind":"pith_short_12","alias_value":"QLURHVR2W4YS","created_at":"2026-05-18T12:33:27.125529+00:00"},{"alias_kind":"pith_short_16","alias_value":"QLURHVR2W4YSVZG5","created_at":"2026-05-18T12:33:27.125529+00:00"},{"alias_kind":"pith_short_8","alias_value":"QLURHVR2","created_at":"2026-05-18T12:33:27.125529+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/QLURHVR2W4YSVZG5YHVNGL2LDQ","json":"https://pith.science/pith/QLURHVR2W4YSVZG5YHVNGL2LDQ.json","graph_json":"https://pith.science/api/pith-number/QLURHVR2W4YSVZG5YHVNGL2LDQ/graph.json","events_json":"https://pith.science/api/pith-number/QLURHVR2W4YSVZG5YHVNGL2LDQ/events.json","paper":"https://pith.science/paper/QLURHVR2"},"agent_actions":{"view_html":"https://pith.science/pith/QLURHVR2W4YSVZG5YHVNGL2LDQ","download_json":"https://pith.science/pith/QLURHVR2W4YSVZG5YHVNGL2LDQ.json","view_paper":"https://pith.science/paper/QLURHVR2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1903.02053&json=true","fetch_graph":"https://pith.science/api/pith-number/QLURHVR2W4YSVZG5YHVNGL2LDQ/graph.json","fetch_events":"https://pith.science/api/pith-number/QLURHVR2W4YSVZG5YHVNGL2LDQ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QLURHVR2W4YSVZG5YHVNGL2LDQ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QLURHVR2W4YSVZG5YHVNGL2LDQ/action/storage_attestation","attest_author":"https://pith.science/pith/QLURHVR2W4YSVZG5YHVNGL2LDQ/action/author_attestation","sign_citation":"https://pith.science/pith/QLURHVR2W4YSVZG5YHVNGL2LDQ/action/citation_signature","submit_replication":"https://pith.science/pith/QLURHVR2W4YSVZG5YHVNGL2LDQ/action/replication_record"}},"created_at":"2026-05-17T23:47:16.885469+00:00","updated_at":"2026-05-17T23:47:16.885469+00:00"}