{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:5GDBJ25HSZMQNKRIW7BA75DHQJ","short_pith_number":"pith:5GDBJ25H","canonical_record":{"source":{"id":"2011.14275","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-11-29T04:27:21Z","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"title_canon_sha256":"d40cba30a65d026d03f925d3089c3ad1d8322931a04c192ee09234e7387c608a","abstract_canon_sha256":"212bfd1a9e5ec93a7088ac0009a5561b290f9df98dbbb804d4367e8ddcf68707"},"schema_version":"1.0"},"canonical_sha256":"e98614eba7965906aa28b7c20ff467824a01377a74499dcd667bf98fe68ba21f","source":{"kind":"arxiv","id":"2011.14275","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.14275","created_at":"2026-07-05T03:35:07Z"},{"alias_kind":"arxiv_version","alias_value":"2011.14275v2","created_at":"2026-07-05T03:35:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.14275","created_at":"2026-07-05T03:35:07Z"},{"alias_kind":"pith_short_12","alias_value":"5GDBJ25HSZMQ","created_at":"2026-07-05T03:35:07Z"},{"alias_kind":"pith_short_16","alias_value":"5GDBJ25HSZMQNKRI","created_at":"2026-07-05T03:35:07Z"},{"alias_kind":"pith_short_8","alias_value":"5GDBJ25H","created_at":"2026-07-05T03:35:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:5GDBJ25HSZMQNKRIW7BA75DHQJ","target":"record","payload":{"canonical_record":{"source":{"id":"2011.14275","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-11-29T04:27:21Z","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"title_canon_sha256":"d40cba30a65d026d03f925d3089c3ad1d8322931a04c192ee09234e7387c608a","abstract_canon_sha256":"212bfd1a9e5ec93a7088ac0009a5561b290f9df98dbbb804d4367e8ddcf68707"},"schema_version":"1.0"},"canonical_sha256":"e98614eba7965906aa28b7c20ff467824a01377a74499dcd667bf98fe68ba21f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:35:07.854708Z","signature_b64":"CIeU6Z9j8f/5K3Qqei/W5VRtp3B4ig5lvCnxwwzFx7JbxrE6cbH0avhIIvexAU9ll/PzhsArjUDFiIoSmOgXCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e98614eba7965906aa28b7c20ff467824a01377a74499dcd667bf98fe68ba21f","last_reissued_at":"2026-07-05T03:35:07.854223Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:35:07.854223Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.14275","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:35:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"klxdh+CG8l13IFj4a3DwAsRQ4wMnBoGuy0QzcD6yN0TRAvoSu9ra0UmgYXtVqdFAD2yRWbJDNumh17VTuoFCBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T17:13:03.267373Z"},"content_sha256":"e482ce8f2e80398b94c7865021016d254cf323854508222d22fa86f56e6ad33c","schema_version":"1.0","event_id":"sha256:e482ce8f2e80398b94c7865021016d254cf323854508222d22fa86f56e6ad33c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:5GDBJ25HSZMQNKRIW7BA75DHQJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observation of arbitrary topological windings of a non-Hermitian band","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","quant-ph"],"primary_cat":"physics.optics","authors_text":"Avik Dutt, Casey C. Wojcik, Jelena Vu\\v{c}kovi\\'c, Kai Wang, Ki Youl Yang, Shanhui Fan","submitted_at":"2020-11-29T04:27:21Z","abstract_excerpt":"The non-trivial topological features in the energy band of non-Hermitian systems provide promising pathways to achieve robust physical behaviors in classical or quantum open systems. A key topological feature, unique to non-Hermitian systems, is the non-trivial winding of the energy band in the complex energy plane. Here we provide direct experimental demonstrations of such non-trivial winding, by implementing non-Hermitian lattice Hamiltonians along a frequency synthetic dimension formed in a ring resonator undergoing simultaneous phase and amplitude modulations, and by directly characterizin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.14275","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2011.14275/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":"2026-07-05T03:35:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PccxUBk+ua6zEjUXTy+/j2+Ku5xr8nG6kjvg5fqZ3P5kDaZFFaxyF9Pg1tqZ+dcLBr4K4kJMTzUaeGUC/E9rBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T17:13:03.267968Z"},"content_sha256":"0975eb9542d1f20852603e895299687bb8873f1614dfb50f0b11c626fb78f99e","schema_version":"1.0","event_id":"sha256:0975eb9542d1f20852603e895299687bb8873f1614dfb50f0b11c626fb78f99e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5GDBJ25HSZMQNKRIW7BA75DHQJ/bundle.json","state_url":"https://pith.science/pith/5GDBJ25HSZMQNKRIW7BA75DHQJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5GDBJ25HSZMQNKRIW7BA75DHQJ/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":"2026-08-07T17:13:03Z","links":{"resolver":"https://pith.science/pith/5GDBJ25HSZMQNKRIW7BA75DHQJ","bundle":"https://pith.science/pith/5GDBJ25HSZMQNKRIW7BA75DHQJ/bundle.json","state":"https://pith.science/pith/5GDBJ25HSZMQNKRIW7BA75DHQJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5GDBJ25HSZMQNKRIW7BA75DHQJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:5GDBJ25HSZMQNKRIW7BA75DHQJ","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":"212bfd1a9e5ec93a7088ac0009a5561b290f9df98dbbb804d4367e8ddcf68707","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-11-29T04:27:21Z","title_canon_sha256":"d40cba30a65d026d03f925d3089c3ad1d8322931a04c192ee09234e7387c608a"},"schema_version":"1.0","source":{"id":"2011.14275","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.14275","created_at":"2026-07-05T03:35:07Z"},{"alias_kind":"arxiv_version","alias_value":"2011.14275v2","created_at":"2026-07-05T03:35:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.14275","created_at":"2026-07-05T03:35:07Z"},{"alias_kind":"pith_short_12","alias_value":"5GDBJ25HSZMQ","created_at":"2026-07-05T03:35:07Z"},{"alias_kind":"pith_short_16","alias_value":"5GDBJ25HSZMQNKRI","created_at":"2026-07-05T03:35:07Z"},{"alias_kind":"pith_short_8","alias_value":"5GDBJ25H","created_at":"2026-07-05T03:35:07Z"}],"graph_snapshots":[{"event_id":"sha256:0975eb9542d1f20852603e895299687bb8873f1614dfb50f0b11c626fb78f99e","target":"graph","created_at":"2026-07-05T03:35:07Z","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/2011.14275/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The non-trivial topological features in the energy band of non-Hermitian systems provide promising pathways to achieve robust physical behaviors in classical or quantum open systems. A key topological feature, unique to non-Hermitian systems, is the non-trivial winding of the energy band in the complex energy plane. Here we provide direct experimental demonstrations of such non-trivial winding, by implementing non-Hermitian lattice Hamiltonians along a frequency synthetic dimension formed in a ring resonator undergoing simultaneous phase and amplitude modulations, and by directly characterizin","authors_text":"Avik Dutt, Casey C. Wojcik, Jelena Vu\\v{c}kovi\\'c, Kai Wang, Ki Youl Yang, Shanhui Fan","cross_cats":["cond-mat.mes-hall","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-11-29T04:27:21Z","title":"Observation of arbitrary topological windings of a non-Hermitian band"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.14275","kind":"arxiv","version":2},"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:e482ce8f2e80398b94c7865021016d254cf323854508222d22fa86f56e6ad33c","target":"record","created_at":"2026-07-05T03:35:07Z","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":"212bfd1a9e5ec93a7088ac0009a5561b290f9df98dbbb804d4367e8ddcf68707","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-11-29T04:27:21Z","title_canon_sha256":"d40cba30a65d026d03f925d3089c3ad1d8322931a04c192ee09234e7387c608a"},"schema_version":"1.0","source":{"id":"2011.14275","kind":"arxiv","version":2}},"canonical_sha256":"e98614eba7965906aa28b7c20ff467824a01377a74499dcd667bf98fe68ba21f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e98614eba7965906aa28b7c20ff467824a01377a74499dcd667bf98fe68ba21f","first_computed_at":"2026-07-05T03:35:07.854223Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:35:07.854223Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CIeU6Z9j8f/5K3Qqei/W5VRtp3B4ig5lvCnxwwzFx7JbxrE6cbH0avhIIvexAU9ll/PzhsArjUDFiIoSmOgXCw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:35:07.854708Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.14275","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e482ce8f2e80398b94c7865021016d254cf323854508222d22fa86f56e6ad33c","sha256:0975eb9542d1f20852603e895299687bb8873f1614dfb50f0b11c626fb78f99e"],"state_sha256":"41275c4faad438137ded2e57c6891b42753d60bb9318939ae15335cf588b3666"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3n4JIiXQwh3PvZQ0AHf+kgd9dvLzhEm5UaloRVOztwkCeGx8S7GJJ6mz6F1ppadAMPOImy+pG/HCQpDpuXtXDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T17:13:03.273209Z","bundle_sha256":"abffb1ad3d933e7ec045f29e31dd454516758ca2b89fea807a87750c348ecc18"}}