{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:CZUOB5SX5ZVHM4VZC7JFW5DQXB","short_pith_number":"pith:CZUOB5SX","schema_version":"1.0","canonical_sha256":"1668e0f657ee6a7672b917d25b7470b84923780573707e665b57301f8256ea9f","source":{"kind":"arxiv","id":"2508.08255","version":1},"attestation_state":"computed","paper":{"title":"Observation of Metal-Insulator and Spectral Phase Transitions in Aubry-Andr\\'e-Harper Models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","physics.optics"],"primary_cat":"quant-ph","authors_text":"Christopher Cedzich, Peng Xue, Qi Zhou, Quan Lin","submitted_at":"2025-08-11T17:59:59Z","abstract_excerpt":"Non-Hermitian extensions of the Aubry-Andr\\'e-Harper (AAH) model reveal a rich variety of phase transitions arising from the interplay of quasiperiodicity and non-Hermiticity. Despite their theoretical significance, experimental explorations remain challenging due to complexities in realizing controlled non-Hermiticity. Here, we present the first experimental realization of the unitary almost-Mathieu operator (UAMO) which simulates the AAH model by employing single-photon quantum walks. Through precise control of quasiperiodicity, we systematically explore the phase diagram displaying a phase "},"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":"2508.08255","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-08-11T17:59:59Z","cross_cats_sorted":["cond-mat.mes-hall","physics.optics"],"title_canon_sha256":"9368ddee6ad05f530762d075543d0415326e9020986d17ab5ba4a229eabf9c51","abstract_canon_sha256":"5ef8f5f68c197904dc77e23ac896a04dc6e2eac242b441e3b97ff63a4e5986bd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:52:10.536469Z","signature_b64":"X3bclFopHi8MkrAIk1Z9+WHn0+1gGL3NABQTLhHLUNNz/qd+FVt65ZMIkKkoqirQp2OEI7PDAqJ7ZDJrm2gnDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1668e0f657ee6a7672b917d25b7470b84923780573707e665b57301f8256ea9f","last_reissued_at":"2026-07-05T11:52:10.535946Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:52:10.535946Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observation of Metal-Insulator and Spectral Phase Transitions in Aubry-Andr\\'e-Harper Models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","physics.optics"],"primary_cat":"quant-ph","authors_text":"Christopher Cedzich, Peng Xue, Qi Zhou, Quan Lin","submitted_at":"2025-08-11T17:59:59Z","abstract_excerpt":"Non-Hermitian extensions of the Aubry-Andr\\'e-Harper (AAH) model reveal a rich variety of phase transitions arising from the interplay of quasiperiodicity and non-Hermiticity. Despite their theoretical significance, experimental explorations remain challenging due to complexities in realizing controlled non-Hermiticity. Here, we present the first experimental realization of the unitary almost-Mathieu operator (UAMO) which simulates the AAH model by employing single-photon quantum walks. Through precise control of quasiperiodicity, we systematically explore the phase diagram displaying a phase "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.08255","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/2508.08255/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":"2508.08255","created_at":"2026-07-05T11:52:10.536007+00:00"},{"alias_kind":"arxiv_version","alias_value":"2508.08255v1","created_at":"2026-07-05T11:52:10.536007+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.08255","created_at":"2026-07-05T11:52:10.536007+00:00"},{"alias_kind":"pith_short_12","alias_value":"CZUOB5SX5ZVH","created_at":"2026-07-05T11:52:10.536007+00:00"},{"alias_kind":"pith_short_16","alias_value":"CZUOB5SX5ZVHM4VZ","created_at":"2026-07-05T11:52:10.536007+00:00"},{"alias_kind":"pith_short_8","alias_value":"CZUOB5SX","created_at":"2026-07-05T11:52:10.536007+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/CZUOB5SX5ZVHM4VZC7JFW5DQXB","json":"https://pith.science/pith/CZUOB5SX5ZVHM4VZC7JFW5DQXB.json","graph_json":"https://pith.science/api/pith-number/CZUOB5SX5ZVHM4VZC7JFW5DQXB/graph.json","events_json":"https://pith.science/api/pith-number/CZUOB5SX5ZVHM4VZC7JFW5DQXB/events.json","paper":"https://pith.science/paper/CZUOB5SX"},"agent_actions":{"view_html":"https://pith.science/pith/CZUOB5SX5ZVHM4VZC7JFW5DQXB","download_json":"https://pith.science/pith/CZUOB5SX5ZVHM4VZC7JFW5DQXB.json","view_paper":"https://pith.science/paper/CZUOB5SX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2508.08255&json=true","fetch_graph":"https://pith.science/api/pith-number/CZUOB5SX5ZVHM4VZC7JFW5DQXB/graph.json","fetch_events":"https://pith.science/api/pith-number/CZUOB5SX5ZVHM4VZC7JFW5DQXB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CZUOB5SX5ZVHM4VZC7JFW5DQXB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CZUOB5SX5ZVHM4VZC7JFW5DQXB/action/storage_attestation","attest_author":"https://pith.science/pith/CZUOB5SX5ZVHM4VZC7JFW5DQXB/action/author_attestation","sign_citation":"https://pith.science/pith/CZUOB5SX5ZVHM4VZC7JFW5DQXB/action/citation_signature","submit_replication":"https://pith.science/pith/CZUOB5SX5ZVHM4VZC7JFW5DQXB/action/replication_record"}},"created_at":"2026-07-05T11:52:10.536007+00:00","updated_at":"2026-07-05T11:52:10.536007+00:00"}