{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:PJIVP5ZPVAGNXHT2PONJFG5BPT","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":"0409d014d677b4ef96f6be602e6fbdafa971bd863ded1adf0a090fa9b3c25e3d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-02-03T03:53:32Z","title_canon_sha256":"b986c0936343cceb6e2a1f7fd94fa8db3e6c4fea8d1004a0a84d4c7d46abd6b9"},"schema_version":"1.0","source":{"id":"1502.00728","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.00728","created_at":"2026-05-18T01:41:05Z"},{"alias_kind":"arxiv_version","alias_value":"1502.00728v1","created_at":"2026-05-18T01:41:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.00728","created_at":"2026-05-18T01:41:05Z"},{"alias_kind":"pith_short_12","alias_value":"PJIVP5ZPVAGN","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"PJIVP5ZPVAGNXHT2","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"PJIVP5ZP","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:a6214f08cd358d7e9338797d7db9c1fb25b48b25a1d8b76088ed9b307a8442ba","target":"graph","created_at":"2026-05-18T01:41:05Z","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":"Extremely anisotropic metal-dielectric multilayer metamaterials are designed to have the effective permittivity tensor of a transverse component (parallel to the interfaces of the multilayer) with zero real part and a longitudinal component (normal to the interfaces of the multilayer) with ultra-large imaginary part at the same wavelength, including the optical nonlocality analysis based on the transfer-matrix method. The diffraction-free deep-subwavelength optical beam propagation with near-zero phase variation in the designed multilayer stack due to the near-flat iso-frequency contour is dem","authors_text":"Jie Gao, Lei Sun, Wei Wang, Xiaodong Yang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-02-03T03:53:32Z","title":"Diffraction-free optical beam propagation with near-zero phase variation in extremely anisotropic metamaterials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.00728","kind":"arxiv","version":1},"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":"sha256:5bcdcb117de41ccf8bc81c6e9eb9736a76911f535395199d563f03babcb2c34f","target":"record","created_at":"2026-05-18T01:41:05Z","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":"0409d014d677b4ef96f6be602e6fbdafa971bd863ded1adf0a090fa9b3c25e3d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-02-03T03:53:32Z","title_canon_sha256":"b986c0936343cceb6e2a1f7fd94fa8db3e6c4fea8d1004a0a84d4c7d46abd6b9"},"schema_version":"1.0","source":{"id":"1502.00728","kind":"arxiv","version":1}},"canonical_sha256":"7a5157f72fa80cdb9e7a7b9a929ba17cd4f54e214a231b266ca0f9cb58532653","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7a5157f72fa80cdb9e7a7b9a929ba17cd4f54e214a231b266ca0f9cb58532653","first_computed_at":"2026-05-18T01:41:05.199902Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:05.199902Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dAessVmyYcMUn/wgzKgAWpF8+hlWVHRryW6ax4C8gbiECg5byhVGPY2ie1qrHXPZDAa7Vl+kIJjzF8Xf10fzBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:05.200561Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.00728","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bcdcb117de41ccf8bc81c6e9eb9736a76911f535395199d563f03babcb2c34f","sha256:a6214f08cd358d7e9338797d7db9c1fb25b48b25a1d8b76088ed9b307a8442ba"],"state_sha256":"c7fcbaf8eee6ae58865d6def2d9de2f859cf70fa2aaf2f044a1fc79a1f618500"}