{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:T4QK5VXHOTBCD3SORK6DVR32TK","short_pith_number":"pith:T4QK5VXH","schema_version":"1.0","canonical_sha256":"9f20aed6e774c221ee4e8abc3ac77a9ab61c6ac1ab86a5b3e8f067a834a49ab7","source":{"kind":"arxiv","id":"2012.13488","version":1},"attestation_state":"computed","paper":{"title":"Nonclassical oscillations in pre- and post-selected quantum walks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Anning Zhang, Jian Li, Jiazhi Yang, Pawel Kurzynski, Tomasz Kopyciuk, Xiaoxiao Chen, Zhe Meng","submitted_at":"2020-12-25T02:31:25Z","abstract_excerpt":"Quantum walks are counterparts of classical random walks. They spread faster, which can be exploited in information processing tasks, and constitute a versatile simulation platform for many quantum systems. Yet, some of their properties can be emulated with classical light. This rises a question: which aspects of the model are truly nonclassical? We address it by carrying out a photonic experiment based on a pre- and post-selection paradox. The paradox implies that if somebody could choose to ask, either if the particle is at position x = 0 at even time steps, or at position x = d (d > 1) at o"},"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":"2012.13488","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-12-25T02:31:25Z","cross_cats_sorted":[],"title_canon_sha256":"a92be8528d78eabe62e8e332ea7a2e8eb2c432e9a7ecec5e47f42f79cffe2f03","abstract_canon_sha256":"b7e630b2359ae3c9860d4ac2762cf7f9bf1ab9e37e0446c4f30562e33043d5bb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:02:43.676112Z","signature_b64":"YgfIEmiBWUR3kUW+rf5IxW0dt0rVIXOZi/+yt2MD/u5cfWj6NTy+kfySHDUeGxdDuJeK98LPD2F4RHKzCh/FAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f20aed6e774c221ee4e8abc3ac77a9ab61c6ac1ab86a5b3e8f067a834a49ab7","last_reissued_at":"2026-07-05T03:02:43.675673Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:02:43.675673Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Nonclassical oscillations in pre- and post-selected quantum walks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Anning Zhang, Jian Li, Jiazhi Yang, Pawel Kurzynski, Tomasz Kopyciuk, Xiaoxiao Chen, Zhe Meng","submitted_at":"2020-12-25T02:31:25Z","abstract_excerpt":"Quantum walks are counterparts of classical random walks. They spread faster, which can be exploited in information processing tasks, and constitute a versatile simulation platform for many quantum systems. Yet, some of their properties can be emulated with classical light. This rises a question: which aspects of the model are truly nonclassical? We address it by carrying out a photonic experiment based on a pre- and post-selection paradox. The paradox implies that if somebody could choose to ask, either if the particle is at position x = 0 at even time steps, or at position x = d (d > 1) at o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.13488","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/2012.13488/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2012.13488","created_at":"2026-07-05T03:02:43.675731+00:00"},{"alias_kind":"arxiv_version","alias_value":"2012.13488v1","created_at":"2026-07-05T03:02:43.675731+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.13488","created_at":"2026-07-05T03:02:43.675731+00:00"},{"alias_kind":"pith_short_12","alias_value":"T4QK5VXHOTBC","created_at":"2026-07-05T03:02:43.675731+00:00"},{"alias_kind":"pith_short_16","alias_value":"T4QK5VXHOTBCD3SO","created_at":"2026-07-05T03:02:43.675731+00:00"},{"alias_kind":"pith_short_8","alias_value":"T4QK5VXH","created_at":"2026-07-05T03:02:43.675731+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/T4QK5VXHOTBCD3SORK6DVR32TK","json":"https://pith.science/pith/T4QK5VXHOTBCD3SORK6DVR32TK.json","graph_json":"https://pith.science/api/pith-number/T4QK5VXHOTBCD3SORK6DVR32TK/graph.json","events_json":"https://pith.science/api/pith-number/T4QK5VXHOTBCD3SORK6DVR32TK/events.json","paper":"https://pith.science/paper/T4QK5VXH"},"agent_actions":{"view_html":"https://pith.science/pith/T4QK5VXHOTBCD3SORK6DVR32TK","download_json":"https://pith.science/pith/T4QK5VXHOTBCD3SORK6DVR32TK.json","view_paper":"https://pith.science/paper/T4QK5VXH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2012.13488&json=true","fetch_graph":"https://pith.science/api/pith-number/T4QK5VXHOTBCD3SORK6DVR32TK/graph.json","fetch_events":"https://pith.science/api/pith-number/T4QK5VXHOTBCD3SORK6DVR32TK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/T4QK5VXHOTBCD3SORK6DVR32TK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/T4QK5VXHOTBCD3SORK6DVR32TK/action/storage_attestation","attest_author":"https://pith.science/pith/T4QK5VXHOTBCD3SORK6DVR32TK/action/author_attestation","sign_citation":"https://pith.science/pith/T4QK5VXHOTBCD3SORK6DVR32TK/action/citation_signature","submit_replication":"https://pith.science/pith/T4QK5VXHOTBCD3SORK6DVR32TK/action/replication_record"}},"created_at":"2026-07-05T03:02:43.675731+00:00","updated_at":"2026-07-05T03:02:43.675731+00:00"}