{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:TBRDJN4WBE57VQC264XVVXC7GG","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":"15772cccd331cf039e4e1859196b1f310a58564a84422fa118e1cc0d9cedb015","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-04-29T11:06:47Z","title_canon_sha256":"f9fdd1b1dffd8d93e01d85e31a05f01d7a0d891fefe2f8ed514b6f553bf42a09"},"schema_version":"1.0","source":{"id":"1504.07809","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.07809","created_at":"2026-05-18T01:14:18Z"},{"alias_kind":"arxiv_version","alias_value":"1504.07809v2","created_at":"2026-05-18T01:14:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.07809","created_at":"2026-05-18T01:14:18Z"},{"alias_kind":"pith_short_12","alias_value":"TBRDJN4WBE57","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TBRDJN4WBE57VQC2","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TBRDJN4W","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:5463728dd9331377e9bc5662862e0bd0096166fafcc1ea8fd8890d0e4c33ce95","target":"graph","created_at":"2026-05-18T01:14:18Z","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"},"paper":{"abstract_excerpt":"Topological photonic states, inspired by robust chiral edge states in topological insulators, have recently been demonstrated in a few photonic systems, including an array of coupled on-chip ring resonators at communication wavelengths. However, the intrinsic difference between electrons and photons determines that the topological protection in time-reversal-invariant photonic systems does not share the same robustness as its counterpart in electronic topological insulators. Here, in a designer surface plasmon platform consisting of tunable metallic sub-wavelength structures, we construct phot","authors_text":"Baile Zhang, Fei Gao, Hongsheng Chen, Hongyi Xu, John D. Joannopoulos, Ling Lu, Marin Soljacic, Xiao Lin, Xihang Shi, Yidong Chong, Zhaoju Yang, Zhen Gao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-04-29T11:06:47Z","title":"Probing topological protection using a designer surface plasmon structure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.07809","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":"sha256:1a65917abaefadd38a29284bf82bed8f39b46826cc41c18dac186a502a7a0c5b","target":"record","created_at":"2026-05-18T01:14:18Z","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":"15772cccd331cf039e4e1859196b1f310a58564a84422fa118e1cc0d9cedb015","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-04-29T11:06:47Z","title_canon_sha256":"f9fdd1b1dffd8d93e01d85e31a05f01d7a0d891fefe2f8ed514b6f553bf42a09"},"schema_version":"1.0","source":{"id":"1504.07809","kind":"arxiv","version":2}},"canonical_sha256":"986234b796093bfac05af72f5adc5f318bea464ddf718d5520b8179139f4f7ec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"986234b796093bfac05af72f5adc5f318bea464ddf718d5520b8179139f4f7ec","first_computed_at":"2026-05-18T01:14:18.155544Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:14:18.155544Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YBNQqmQeUFwN34wdHxcazP482vDMAzGWGhXeGexpLHqUKqf0E6F2RfIIgIaVa1TupzeEGtgAOM4h+jx0L0O+DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:14:18.156102Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.07809","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a65917abaefadd38a29284bf82bed8f39b46826cc41c18dac186a502a7a0c5b","sha256:5463728dd9331377e9bc5662862e0bd0096166fafcc1ea8fd8890d0e4c33ce95"],"state_sha256":"1b6bdf816781c5cb053fe8e4b12c8b2a673d1ffa794cbc78392ecfe6bdc3ffeb"}