{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:3IRA4RYXPEDPGP6A7BJGHCB36S","short_pith_number":"pith:3IRA4RYX","canonical_record":{"source":{"id":"1601.02525","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-01-11T17:18:12Z","cross_cats_sorted":[],"title_canon_sha256":"d4759ef6db4b0c864cb3c9264a4806f985f2da4f8329567c1a7d465edc4a9c19","abstract_canon_sha256":"aa1e7dd3ff9ca89f6f57d89cdb4bf54647338694ba4abf2fd8c8c9d2c1c9a3c3"},"schema_version":"1.0"},"canonical_sha256":"da220e47177906f33fc0f85263883bf4bddafa76b9bd033195bb921c3fe37485","source":{"kind":"arxiv","id":"1601.02525","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.02525","created_at":"2026-05-18T00:40:54Z"},{"alias_kind":"arxiv_version","alias_value":"1601.02525v1","created_at":"2026-05-18T00:40:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.02525","created_at":"2026-05-18T00:40:54Z"},{"alias_kind":"pith_short_12","alias_value":"3IRA4RYXPEDP","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3IRA4RYXPEDPGP6A","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3IRA4RYX","created_at":"2026-05-18T12:29:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:3IRA4RYXPEDPGP6A7BJGHCB36S","target":"record","payload":{"canonical_record":{"source":{"id":"1601.02525","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-01-11T17:18:12Z","cross_cats_sorted":[],"title_canon_sha256":"d4759ef6db4b0c864cb3c9264a4806f985f2da4f8329567c1a7d465edc4a9c19","abstract_canon_sha256":"aa1e7dd3ff9ca89f6f57d89cdb4bf54647338694ba4abf2fd8c8c9d2c1c9a3c3"},"schema_version":"1.0"},"canonical_sha256":"da220e47177906f33fc0f85263883bf4bddafa76b9bd033195bb921c3fe37485","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:40:54.132871Z","signature_b64":"aVMDnvrL1W3SVvAksHnOF2/0kdWs/jl6KKrzuaVLwn0wfjdEoam6AUs+/4serAy6e/c9mO7igfgj/zd3cji8CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"da220e47177906f33fc0f85263883bf4bddafa76b9bd033195bb921c3fe37485","last_reissued_at":"2026-05-18T00:40:54.132226Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:40:54.132226Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.02525","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:40:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BNFuZClefv+y8Zr9C4lnen3uBa1dgXz8m2IHo3zP8u/i6YECSv4ebJdzKVi6wRM3Y1YzI9ix/aCbCWhdkECjAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T22:27:58.649769Z"},"content_sha256":"ba1ab82ccd9a967196bc5dbf16870fc37221033b8c99dd855b501b1e323d6d6e","schema_version":"1.0","event_id":"sha256:ba1ab82ccd9a967196bc5dbf16870fc37221033b8c99dd855b501b1e323d6d6e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:3IRA4RYXPEDPGP6A7BJGHCB36S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Classical electromagnetic model of surface states in topological insulators","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Akhlesh Lakhtakia, Tom G. Mackay","submitted_at":"2016-01-11T17:18:12Z","abstract_excerpt":"A topological insulator is classically modeled as an isotropic dielectric-magnetic with a magnetoelectric pseudoscalar $\\Psi$ existing in its bulk while its surface is charge-free and current-free. An alternative model is obtained by setting $\\Psi\\equiv0$ and incorporating surface charge and current densities characterized by an admittance $\\gamma$. Analysis of plane-wave reflection and refraction due to a topological-insulator half space reveals that the parameters $\\Psi$ and $\\gamma$ arise identically in the reflection and transmission coefficients, implying that the two classical models can"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.02525","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":""},"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":"2026-05-18T00:40:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hP7KYPzHdIRBxhxshh3uxxNMJ9HPMAqg8RqKqdiBA5xLF6mJ2FiYS2YjsI/7jlxPGgdO91Mgsv/baWvMH3WlBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T22:27:58.650325Z"},"content_sha256":"60859d962db3d28f14363800746d75d70b27d49266bc91adcef8b29f8b2dfc4d","schema_version":"1.0","event_id":"sha256:60859d962db3d28f14363800746d75d70b27d49266bc91adcef8b29f8b2dfc4d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3IRA4RYXPEDPGP6A7BJGHCB36S/bundle.json","state_url":"https://pith.science/pith/3IRA4RYXPEDPGP6A7BJGHCB36S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3IRA4RYXPEDPGP6A7BJGHCB36S/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":"2026-06-21T22:27:58Z","links":{"resolver":"https://pith.science/pith/3IRA4RYXPEDPGP6A7BJGHCB36S","bundle":"https://pith.science/pith/3IRA4RYXPEDPGP6A7BJGHCB36S/bundle.json","state":"https://pith.science/pith/3IRA4RYXPEDPGP6A7BJGHCB36S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3IRA4RYXPEDPGP6A7BJGHCB36S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3IRA4RYXPEDPGP6A7BJGHCB36S","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":"aa1e7dd3ff9ca89f6f57d89cdb4bf54647338694ba4abf2fd8c8c9d2c1c9a3c3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-01-11T17:18:12Z","title_canon_sha256":"d4759ef6db4b0c864cb3c9264a4806f985f2da4f8329567c1a7d465edc4a9c19"},"schema_version":"1.0","source":{"id":"1601.02525","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.02525","created_at":"2026-05-18T00:40:54Z"},{"alias_kind":"arxiv_version","alias_value":"1601.02525v1","created_at":"2026-05-18T00:40:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.02525","created_at":"2026-05-18T00:40:54Z"},{"alias_kind":"pith_short_12","alias_value":"3IRA4RYXPEDP","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3IRA4RYXPEDPGP6A","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3IRA4RYX","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:60859d962db3d28f14363800746d75d70b27d49266bc91adcef8b29f8b2dfc4d","target":"graph","created_at":"2026-05-18T00:40:54Z","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":"A topological insulator is classically modeled as an isotropic dielectric-magnetic with a magnetoelectric pseudoscalar $\\Psi$ existing in its bulk while its surface is charge-free and current-free. An alternative model is obtained by setting $\\Psi\\equiv0$ and incorporating surface charge and current densities characterized by an admittance $\\gamma$. Analysis of plane-wave reflection and refraction due to a topological-insulator half space reveals that the parameters $\\Psi$ and $\\gamma$ arise identically in the reflection and transmission coefficients, implying that the two classical models can","authors_text":"Akhlesh Lakhtakia, Tom G. Mackay","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-01-11T17:18:12Z","title":"Classical electromagnetic model of surface states in topological insulators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.02525","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:ba1ab82ccd9a967196bc5dbf16870fc37221033b8c99dd855b501b1e323d6d6e","target":"record","created_at":"2026-05-18T00:40:54Z","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":"aa1e7dd3ff9ca89f6f57d89cdb4bf54647338694ba4abf2fd8c8c9d2c1c9a3c3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-01-11T17:18:12Z","title_canon_sha256":"d4759ef6db4b0c864cb3c9264a4806f985f2da4f8329567c1a7d465edc4a9c19"},"schema_version":"1.0","source":{"id":"1601.02525","kind":"arxiv","version":1}},"canonical_sha256":"da220e47177906f33fc0f85263883bf4bddafa76b9bd033195bb921c3fe37485","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"da220e47177906f33fc0f85263883bf4bddafa76b9bd033195bb921c3fe37485","first_computed_at":"2026-05-18T00:40:54.132226Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:40:54.132226Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aVMDnvrL1W3SVvAksHnOF2/0kdWs/jl6KKrzuaVLwn0wfjdEoam6AUs+/4serAy6e/c9mO7igfgj/zd3cji8CA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:40:54.132871Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.02525","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ba1ab82ccd9a967196bc5dbf16870fc37221033b8c99dd855b501b1e323d6d6e","sha256:60859d962db3d28f14363800746d75d70b27d49266bc91adcef8b29f8b2dfc4d"],"state_sha256":"21751ad552f96e4b19bf0a2013fb30bab41915d5b422536778aa24742783ae3f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YEwJSpPEddyO91EaeJ9MI4UazcfqmEPk8BZ55OHsCyxknOs2ya54BbO7sTK8YXE/67aMkkKUTedXHvPMZ6/SAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T22:27:58.652915Z","bundle_sha256":"61278d5aaf8ee732119518cae88a391836df814bf640b4019ee7afbf1e395ea4"}}