{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:7OI3FSKHMMUOTJALMY5F3QUXV6","short_pith_number":"pith:7OI3FSKH","canonical_record":{"source":{"id":"0810.3539","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2008-10-20T11:58:04Z","cross_cats_sorted":[],"title_canon_sha256":"a56bd439f47bddec2578800d8767ef0b4bfa4cf6d7aa4de1e05427c1003fcb60","abstract_canon_sha256":"710019f1e7992a84b35da3a0f4c9e179a1b18f5680ef94ff3a2f06071a436f29"},"schema_version":"1.0"},"canonical_sha256":"fb91b2c9476328e9a40b663a5dc297afb8f9a1e7ab7eab9b3a92fab502d0d452","source":{"kind":"arxiv","id":"0810.3539","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.3539","created_at":"2026-05-18T04:41:35Z"},{"alias_kind":"arxiv_version","alias_value":"0810.3539v1","created_at":"2026-05-18T04:41:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.3539","created_at":"2026-05-18T04:41:35Z"},{"alias_kind":"pith_short_12","alias_value":"7OI3FSKHMMUO","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"7OI3FSKHMMUOTJAL","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"7OI3FSKH","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:7OI3FSKHMMUOTJALMY5F3QUXV6","target":"record","payload":{"canonical_record":{"source":{"id":"0810.3539","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2008-10-20T11:58:04Z","cross_cats_sorted":[],"title_canon_sha256":"a56bd439f47bddec2578800d8767ef0b4bfa4cf6d7aa4de1e05427c1003fcb60","abstract_canon_sha256":"710019f1e7992a84b35da3a0f4c9e179a1b18f5680ef94ff3a2f06071a436f29"},"schema_version":"1.0"},"canonical_sha256":"fb91b2c9476328e9a40b663a5dc297afb8f9a1e7ab7eab9b3a92fab502d0d452","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:41:35.117888Z","signature_b64":"CLOvyGEh+8EoIwax/XpFLtVilB9HSEl/MKPE+DrKU8jnyespqQ3+Cy21b98S8m0Js5iKAk/YN2y41xsIVqKaBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fb91b2c9476328e9a40b663a5dc297afb8f9a1e7ab7eab9b3a92fab502d0d452","last_reissued_at":"2026-05-18T04:41:35.117488Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:41:35.117488Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0810.3539","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":"2026-05-18T04:41:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"htvbIkVrihY3QDLbJRUjt2x37f/Lg9Qw+aVzRrQf3BFt8izv7e4xDZyHhOai+OS8PiA4FxRA3zyqmQ1A0BZ7Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T07:21:47.674880Z"},"content_sha256":"7a00a164392e17a32455c3718c1ce47503b7fdada01f9561993124cbf7fc769f","schema_version":"1.0","event_id":"sha256:7a00a164392e17a32455c3718c1ce47503b7fdada01f9561993124cbf7fc769f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:7OI3FSKHMMUOTJALMY5F3QUXV6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Strong gyrotopy in a chiral toroidal medium","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"A. D. Boardman, K. Marinov, N. I. Zheludev, N. Papasimakis, V. A. Fedotov","submitted_at":"2008-10-20T11:58:04Z","abstract_excerpt":"In this letter, we present the first experimental study of a new chiral metamaterial consisting of toroidal wire windings. We show that the metamaterial exhibits three bands of circular dichroism in the GHz range. We discuss the response of the structure in terms of multipole moments, including the (magnetic) toroidal dipole moment."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.3539","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":"2026-05-18T04:41:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VYoZ2r3H2j9sGtpy+6PAbfW1UmSsoevpDSAkgeTfhG+nD7mAY3C2oFTRLJlfTAaWBXpCnnTvhg2ANqJtDQpfBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T07:21:47.675223Z"},"content_sha256":"d4701049457eb84c2bd6b8c7127bcf030130e2ecf2cefb25df71283eeab346ee","schema_version":"1.0","event_id":"sha256:d4701049457eb84c2bd6b8c7127bcf030130e2ecf2cefb25df71283eeab346ee"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7OI3FSKHMMUOTJALMY5F3QUXV6/bundle.json","state_url":"https://pith.science/pith/7OI3FSKHMMUOTJALMY5F3QUXV6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7OI3FSKHMMUOTJALMY5F3QUXV6/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":"2026-06-21T07:21:47Z","links":{"resolver":"https://pith.science/pith/7OI3FSKHMMUOTJALMY5F3QUXV6","bundle":"https://pith.science/pith/7OI3FSKHMMUOTJALMY5F3QUXV6/bundle.json","state":"https://pith.science/pith/7OI3FSKHMMUOTJALMY5F3QUXV6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7OI3FSKHMMUOTJALMY5F3QUXV6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:7OI3FSKHMMUOTJALMY5F3QUXV6","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":"710019f1e7992a84b35da3a0f4c9e179a1b18f5680ef94ff3a2f06071a436f29","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2008-10-20T11:58:04Z","title_canon_sha256":"a56bd439f47bddec2578800d8767ef0b4bfa4cf6d7aa4de1e05427c1003fcb60"},"schema_version":"1.0","source":{"id":"0810.3539","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.3539","created_at":"2026-05-18T04:41:35Z"},{"alias_kind":"arxiv_version","alias_value":"0810.3539v1","created_at":"2026-05-18T04:41:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.3539","created_at":"2026-05-18T04:41:35Z"},{"alias_kind":"pith_short_12","alias_value":"7OI3FSKHMMUO","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"7OI3FSKHMMUOTJAL","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"7OI3FSKH","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:d4701049457eb84c2bd6b8c7127bcf030130e2ecf2cefb25df71283eeab346ee","target":"graph","created_at":"2026-05-18T04:41:35Z","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":"In this letter, we present the first experimental study of a new chiral metamaterial consisting of toroidal wire windings. We show that the metamaterial exhibits three bands of circular dichroism in the GHz range. We discuss the response of the structure in terms of multipole moments, including the (magnetic) toroidal dipole moment.","authors_text":"A. D. Boardman, K. Marinov, N. I. Zheludev, N. Papasimakis, V. A. Fedotov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2008-10-20T11:58:04Z","title":"Strong gyrotopy in a chiral toroidal medium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.3539","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":"sha256:7a00a164392e17a32455c3718c1ce47503b7fdada01f9561993124cbf7fc769f","target":"record","created_at":"2026-05-18T04:41:35Z","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":"710019f1e7992a84b35da3a0f4c9e179a1b18f5680ef94ff3a2f06071a436f29","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2008-10-20T11:58:04Z","title_canon_sha256":"a56bd439f47bddec2578800d8767ef0b4bfa4cf6d7aa4de1e05427c1003fcb60"},"schema_version":"1.0","source":{"id":"0810.3539","kind":"arxiv","version":1}},"canonical_sha256":"fb91b2c9476328e9a40b663a5dc297afb8f9a1e7ab7eab9b3a92fab502d0d452","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fb91b2c9476328e9a40b663a5dc297afb8f9a1e7ab7eab9b3a92fab502d0d452","first_computed_at":"2026-05-18T04:41:35.117488Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:41:35.117488Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CLOvyGEh+8EoIwax/XpFLtVilB9HSEl/MKPE+DrKU8jnyespqQ3+Cy21b98S8m0Js5iKAk/YN2y41xsIVqKaBg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:41:35.117888Z","signed_message":"canonical_sha256_bytes"},"source_id":"0810.3539","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7a00a164392e17a32455c3718c1ce47503b7fdada01f9561993124cbf7fc769f","sha256:d4701049457eb84c2bd6b8c7127bcf030130e2ecf2cefb25df71283eeab346ee"],"state_sha256":"d92ed5ecd022387cc7959b49638aae097de7a7c803ec650bb3d4f5787eeac630"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bwe1u+VT6IFqxmICJdkIfNOf19PSnuXuw2fyZa1vG6GAoP2p6sO+7My4JkNEN27yGYoGPm4avSAiRcPR07qhCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T07:21:47.677139Z","bundle_sha256":"575e67a7e4ccf6a086e5ab67112c19bba9b9459d9a3879b7763ef49c5d3663f0"}}