{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7MSFVBSN55D3CLS35HIH63RDCG","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":"da9d5e91aca5cf880a6f3121ae24e36242b6c15e3b199d11ca9591a15d0e7ba8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2018-04-25T11:48:06Z","title_canon_sha256":"c9740ac260f243ab35da17c38c5c92d09cecb4d7e27d4223f790ddb9a3391744"},"schema_version":"1.0","source":{"id":"1804.09489","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.09489","created_at":"2026-05-17T23:52:18Z"},{"alias_kind":"arxiv_version","alias_value":"1804.09489v2","created_at":"2026-05-17T23:52:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.09489","created_at":"2026-05-17T23:52:18Z"},{"alias_kind":"pith_short_12","alias_value":"7MSFVBSN55D3","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7MSFVBSN55D3CLS3","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7MSFVBSN","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:69f628be45fc29565ed57906fa4b15754414eea20b7f4766a6dfbb5b4e750529","target":"graph","created_at":"2026-05-17T23:52:18Z","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":"Dielectric structures composed of many inclusions that manipulate light in ways the bulk materials cannot are commonly seen in the field of metamaterials. In these structures, each inclusion depends on a set of parameters such as location and orientation, which are difficult to ascertain. We propose and implement an optimization-based approach for designing such metamaterials in two dimensions by using a fast boundary element method and a multiple-scattering solver for a given set of parameters. This approach provides the backbone of an automated process for the design and analysis of metamate","authors_text":"Boaz Blankrot, Clemens Heitzinger","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2018-04-25T11:48:06Z","title":"Efficient computational design and optimization of dielectric metamaterial devices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.09489","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":"sha256:35b2e37bc757d5e01d44edda3a111047f4944a1ea8171288e6a1f5a4d7faf279","target":"record","created_at":"2026-05-17T23:52:18Z","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":"da9d5e91aca5cf880a6f3121ae24e36242b6c15e3b199d11ca9591a15d0e7ba8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2018-04-25T11:48:06Z","title_canon_sha256":"c9740ac260f243ab35da17c38c5c92d09cecb4d7e27d4223f790ddb9a3391744"},"schema_version":"1.0","source":{"id":"1804.09489","kind":"arxiv","version":2}},"canonical_sha256":"fb245a864def47b12e5be9d07f6e2311a3e0b1fcd8eb6a3f6da0c6086fe1aef6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fb245a864def47b12e5be9d07f6e2311a3e0b1fcd8eb6a3f6da0c6086fe1aef6","first_computed_at":"2026-05-17T23:52:18.423683Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:18.423683Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aqiZXXw5jdQ0yvzyyLj5HardC/JBUN44Lj9DKSrlSFyEsA6EDFG0xuKHGXOvqarWYhJ7Na8SqPMFUwmYOCU+DA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:18.424423Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.09489","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:35b2e37bc757d5e01d44edda3a111047f4944a1ea8171288e6a1f5a4d7faf279","sha256:69f628be45fc29565ed57906fa4b15754414eea20b7f4766a6dfbb5b4e750529"],"state_sha256":"61cb61917d6b12a3c25dbfb19151b26208463e76f95a1835784bdb6a47bfdbf2"}