{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:7Z5FEBQU3BPYMT3J4SRGRKUYFG","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":"8b7eab43802a72250daa78869934ee7d029ce2d88091030d3bed632a3a27d50f","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2003-04-02T08:02:09Z","title_canon_sha256":"69e5981d60fbef5b10db6961752c5fe53e3d87745fbb47080f1d1fafb0bf045d"},"schema_version":"1.0","source":{"id":"cond-mat/0304039","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0304039","created_at":"2026-05-18T01:40:01Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0304039v1","created_at":"2026-05-18T01:40:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0304039","created_at":"2026-05-18T01:40:01Z"},{"alias_kind":"pith_short_12","alias_value":"7Z5FEBQU3BPY","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"7Z5FEBQU3BPYMT3J","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"7Z5FEBQU","created_at":"2026-05-18T12:25:51Z"}],"graph_snapshots":[{"event_id":"sha256:b68adf21796c1b3b9165f0234a72064154daab8570aa571c6faadab82bad057f","target":"graph","created_at":"2026-05-18T01:40:01Z","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 physically interesting {\\it effective rest mass} of photons in electromagnetic media, which is independent of wave frequency $\\omega$, is defined in the present paper. It is verified that this frequency-independent effective rest mass of photons can be easily read off from the optical refractive index squared $n^{2}(\\omega) $ of commonly-seen electromagnetic media. As an illustrative example, we extract the frequency-independent effective rest mass of photons from $n^{2}(\\omega) $ in the {\\it two time derivative Lorentz material} (2TDLM) model. The connection between effective rest mass and ","authors_text":"Jian-Qi Shen","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2003-04-02T08:02:09Z","title":"Frequency-independent effective rest mass of photons in the 2TDLM model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0304039","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:e928d691107abbfd577e7f997c02e212e11fe6e1bd31363d8afdaab2e735189f","target":"record","created_at":"2026-05-18T01:40:01Z","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":"8b7eab43802a72250daa78869934ee7d029ce2d88091030d3bed632a3a27d50f","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2003-04-02T08:02:09Z","title_canon_sha256":"69e5981d60fbef5b10db6961752c5fe53e3d87745fbb47080f1d1fafb0bf045d"},"schema_version":"1.0","source":{"id":"cond-mat/0304039","kind":"arxiv","version":1}},"canonical_sha256":"fe7a520614d85f864f69e4a268aa982993a4e53cc93a404ae50dab3d66086946","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe7a520614d85f864f69e4a268aa982993a4e53cc93a404ae50dab3d66086946","first_computed_at":"2026-05-18T01:40:01.655778Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:01.655778Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OKRz/Fvrn0lwHXNPvmgp5i+MNrB5VHY80nyQpcU3Ovo6D5rw0H756awt+YDGx5yrqZ2ND5NFPpSDh/QLs9xxBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:01.656419Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0304039","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e928d691107abbfd577e7f997c02e212e11fe6e1bd31363d8afdaab2e735189f","sha256:b68adf21796c1b3b9165f0234a72064154daab8570aa571c6faadab82bad057f"],"state_sha256":"1222cac7d8ca25bf0f6fcff4eac162d3fc4f7187bed1719c8a6f21f2c9914e6e"}