{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:6QJYOWJYGZLGSFOZB7JS4RFC6L","short_pith_number":"pith:6QJYOWJY","canonical_record":{"source":{"id":"2003.03188","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-03-06T13:28:52Z","cross_cats_sorted":["physics.class-ph"],"title_canon_sha256":"d927e31e82f1dfc042993999bbe7dbe672acb2de2bdfbe21fe085274f1aed254","abstract_canon_sha256":"f0ac5d88f9e00d51d637b26cf353ceaeeb38f6dd12ad8b97c4a1d4ffff9a3b40"},"schema_version":"1.0"},"canonical_sha256":"f41387593836566915d90fd32e44a2f2c58f95ec25650189416ecd4f3c69b8a6","source":{"kind":"arxiv","id":"2003.03188","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2003.03188","created_at":"2026-07-05T06:31:53Z"},{"alias_kind":"arxiv_version","alias_value":"2003.03188v2","created_at":"2026-07-05T06:31:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2003.03188","created_at":"2026-07-05T06:31:53Z"},{"alias_kind":"pith_short_12","alias_value":"6QJYOWJYGZLG","created_at":"2026-07-05T06:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"6QJYOWJYGZLGSFOZ","created_at":"2026-07-05T06:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"6QJYOWJY","created_at":"2026-07-05T06:31:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:6QJYOWJYGZLGSFOZB7JS4RFC6L","target":"record","payload":{"canonical_record":{"source":{"id":"2003.03188","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-03-06T13:28:52Z","cross_cats_sorted":["physics.class-ph"],"title_canon_sha256":"d927e31e82f1dfc042993999bbe7dbe672acb2de2bdfbe21fe085274f1aed254","abstract_canon_sha256":"f0ac5d88f9e00d51d637b26cf353ceaeeb38f6dd12ad8b97c4a1d4ffff9a3b40"},"schema_version":"1.0"},"canonical_sha256":"f41387593836566915d90fd32e44a2f2c58f95ec25650189416ecd4f3c69b8a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:31:53.443617Z","signature_b64":"6Z3Oa+KYEmJq7nWg/5OrAmlRBIRir/A5hHNUbPSRMYPQN2kq9LcSwtAN4Kb5M7Gljj7zgNF6h2dfGjAqi7o/Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f41387593836566915d90fd32e44a2f2c58f95ec25650189416ecd4f3c69b8a6","last_reissued_at":"2026-07-05T06:31:53.443222Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:31:53.443222Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2003.03188","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:31:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1ZgySrPp+Vs5frauIQTSaIGGFqGaJAgSqDaJ0bz2/Djgc90IOBzqLFBeIonGQkrYx+FtDYNKnJ2OZ9fHzz2/Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T01:35:18.872773Z"},"content_sha256":"093d080eaa0d365902855d24e5760546a9b9e26f083dad55d7dafdb5cc753ccb","schema_version":"1.0","event_id":"sha256:093d080eaa0d365902855d24e5760546a9b9e26f083dad55d7dafdb5cc753ccb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:6QJYOWJYGZLGSFOZB7JS4RFC6L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electromagnetic fields in a time-varying medium: Exceptional points and operator symmetries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.class-ph"],"primary_cat":"physics.optics","authors_text":"Romain Fleury, Theodoros T. Koutserimpas","submitted_at":"2020-03-06T13:28:52Z","abstract_excerpt":"In this paper, we study the interactions of electromagnetic waves with a non-dispersive dynamic medium that is temporally dependent. Electromagnetic fields under material time-modulation conserve their momentum but not their energy. We assume a time-variation of the permittivity, permeability and conductivity and derive the appropriate time-domain solutions based on the causality state at a past observation time. We formulate a time-transitioning state matrix and connect the unusual energy transitions of electromagnetic fields in time-varying media with the exceptional point theory. This state"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2003.03188","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2003.03188/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T06:31:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2cR7FigwvAsE+okA9U10WxvFGO2mgrM4slqXX2htWQtLg2AiyBl+898yPLd/cSUTMKcXO9SmvyeZTUL/SDsKBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T01:35:18.873288Z"},"content_sha256":"6816796cc37ebf3207df89f51709b4e6f3850a4540ce281eea5072d1972187cd","schema_version":"1.0","event_id":"sha256:6816796cc37ebf3207df89f51709b4e6f3850a4540ce281eea5072d1972187cd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6QJYOWJYGZLGSFOZB7JS4RFC6L/bundle.json","state_url":"https://pith.science/pith/6QJYOWJYGZLGSFOZB7JS4RFC6L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6QJYOWJYGZLGSFOZB7JS4RFC6L/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":"2026-08-21T01:35:18Z","links":{"resolver":"https://pith.science/pith/6QJYOWJYGZLGSFOZB7JS4RFC6L","bundle":"https://pith.science/pith/6QJYOWJYGZLGSFOZB7JS4RFC6L/bundle.json","state":"https://pith.science/pith/6QJYOWJYGZLGSFOZB7JS4RFC6L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6QJYOWJYGZLGSFOZB7JS4RFC6L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:6QJYOWJYGZLGSFOZB7JS4RFC6L","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":"f0ac5d88f9e00d51d637b26cf353ceaeeb38f6dd12ad8b97c4a1d4ffff9a3b40","cross_cats_sorted":["physics.class-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-03-06T13:28:52Z","title_canon_sha256":"d927e31e82f1dfc042993999bbe7dbe672acb2de2bdfbe21fe085274f1aed254"},"schema_version":"1.0","source":{"id":"2003.03188","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2003.03188","created_at":"2026-07-05T06:31:53Z"},{"alias_kind":"arxiv_version","alias_value":"2003.03188v2","created_at":"2026-07-05T06:31:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2003.03188","created_at":"2026-07-05T06:31:53Z"},{"alias_kind":"pith_short_12","alias_value":"6QJYOWJYGZLG","created_at":"2026-07-05T06:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"6QJYOWJYGZLGSFOZ","created_at":"2026-07-05T06:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"6QJYOWJY","created_at":"2026-07-05T06:31:53Z"}],"graph_snapshots":[{"event_id":"sha256:6816796cc37ebf3207df89f51709b4e6f3850a4540ce281eea5072d1972187cd","target":"graph","created_at":"2026-07-05T06:31:53Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2003.03188/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, we study the interactions of electromagnetic waves with a non-dispersive dynamic medium that is temporally dependent. Electromagnetic fields under material time-modulation conserve their momentum but not their energy. We assume a time-variation of the permittivity, permeability and conductivity and derive the appropriate time-domain solutions based on the causality state at a past observation time. We formulate a time-transitioning state matrix and connect the unusual energy transitions of electromagnetic fields in time-varying media with the exceptional point theory. This state","authors_text":"Romain Fleury, Theodoros T. Koutserimpas","cross_cats":["physics.class-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-03-06T13:28:52Z","title":"Electromagnetic fields in a time-varying medium: Exceptional points and operator symmetries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2003.03188","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":"sha256:093d080eaa0d365902855d24e5760546a9b9e26f083dad55d7dafdb5cc753ccb","target":"record","created_at":"2026-07-05T06:31:53Z","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":"f0ac5d88f9e00d51d637b26cf353ceaeeb38f6dd12ad8b97c4a1d4ffff9a3b40","cross_cats_sorted":["physics.class-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-03-06T13:28:52Z","title_canon_sha256":"d927e31e82f1dfc042993999bbe7dbe672acb2de2bdfbe21fe085274f1aed254"},"schema_version":"1.0","source":{"id":"2003.03188","kind":"arxiv","version":2}},"canonical_sha256":"f41387593836566915d90fd32e44a2f2c58f95ec25650189416ecd4f3c69b8a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f41387593836566915d90fd32e44a2f2c58f95ec25650189416ecd4f3c69b8a6","first_computed_at":"2026-07-05T06:31:53.443222Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:31:53.443222Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6Z3Oa+KYEmJq7nWg/5OrAmlRBIRir/A5hHNUbPSRMYPQN2kq9LcSwtAN4Kb5M7Gljj7zgNF6h2dfGjAqi7o/Dg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:31:53.443617Z","signed_message":"canonical_sha256_bytes"},"source_id":"2003.03188","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:093d080eaa0d365902855d24e5760546a9b9e26f083dad55d7dafdb5cc753ccb","sha256:6816796cc37ebf3207df89f51709b4e6f3850a4540ce281eea5072d1972187cd"],"state_sha256":"e5b452b89687d0035f57dad6b36f452a2027779238f7b1b447768ac4dda89db0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YRPTe+PZXuvT3TfFhUac5TARm66Ft5i0hQF+F389Rxf/jEhvlMArmNcDKADbYvhRIUPDEL44o6esE7hNlEhqBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T01:35:18.878926Z","bundle_sha256":"b242e05ac0435fb4636a013bc224e6e62be85058e3595e34534e3922ad3b6d5b"}}