{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:C3JBNQ2GXOX44TQCUJ6IBO3TUU","short_pith_number":"pith:C3JBNQ2G","canonical_record":{"source":{"id":"1807.08805","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-23T19:51:16Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"91c6ca4156c1c0d9660ce36378c709131c544ba6bddac52b94c015270815e191","abstract_canon_sha256":"9a390378bce1447e3906fce3f543f14d6344e3180c752ec17686d94679df7d10"},"schema_version":"1.0"},"canonical_sha256":"16d216c346bbafce4e02a27c80bb73a539de8cbf6a85ee26e1d73f11c20a2866","source":{"kind":"arxiv","id":"1807.08805","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.08805","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"arxiv_version","alias_value":"1807.08805v2","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.08805","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"pith_short_12","alias_value":"C3JBNQ2GXOX4","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"C3JBNQ2GXOX44TQC","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"C3JBNQ2G","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:C3JBNQ2GXOX44TQCUJ6IBO3TUU","target":"record","payload":{"canonical_record":{"source":{"id":"1807.08805","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-23T19:51:16Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"91c6ca4156c1c0d9660ce36378c709131c544ba6bddac52b94c015270815e191","abstract_canon_sha256":"9a390378bce1447e3906fce3f543f14d6344e3180c752ec17686d94679df7d10"},"schema_version":"1.0"},"canonical_sha256":"16d216c346bbafce4e02a27c80bb73a539de8cbf6a85ee26e1d73f11c20a2866","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:39.509816Z","signature_b64":"PEjIwLdspSv2lj/4Yc3PQygZhp6iYbDM/qYmvRco5NgOCOP6nlS3UL7zWQyqEnQ8WbAC7S/0pFFDweLa9OaLBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16d216c346bbafce4e02a27c80bb73a539de8cbf6a85ee26e1d73f11c20a2866","last_reissued_at":"2026-05-17T23:51:39.509244Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:39.509244Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.08805","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":"2026-05-17T23:51:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ffw5VplJyzI4biyV1wzcKNXHsYTq0AmPSAS5RKIX8GmXE4rHQLhSaylxqtfD5DZFHLRDIws1073QVYcHhbG3Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:16:40.582751Z"},"content_sha256":"d06befb41f9365e5d253f5c88534cd8f0169b38061275d0614583a2274500075","schema_version":"1.0","event_id":"sha256:d06befb41f9365e5d253f5c88534cd8f0169b38061275d0614583a2274500075"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:C3JBNQ2GXOX44TQCUJ6IBO3TUU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Perfectly absorbing exceptional points and chiral absorbers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"physics.optics","authors_text":"A. Douglas Stone, Chia Wei Hsu, Stefan Rotter, William R. Sweeney","submitted_at":"2018-07-23T19:51:16Z","abstract_excerpt":"We identify a new kind of physically realizable exceptional point (EP) corresponding to degenerate coherent perfect absorption, in which two purely incoming solutions of the wave operator for electromagnetic or acoustic waves coalesce to a single state. Such non-hermitian degeneracies can occur at a real-valued frequency without any associated noise or non-linearity, in contrast to EPs in lasers. The absorption lineshape for the eigenchannel near the EP is quartic in frequency around its maximum in any dimension. In general, for the parameters at which an operator EP occurs, the associated sca"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.08805","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":""},"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":"2026-05-17T23:51:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xcYKeF+hUuqCNRtB8LEpi5nwGnqqpm5yjIUBPLWHxAf7RSAj8KVQ9vbs4H6UWqkT59q5Kj1zu9zCTVTMjSBaCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:16:40.583092Z"},"content_sha256":"2c3d9b5f05393d831cbf1040e8c04ef06818431ddd9f5313de302625d27393cd","schema_version":"1.0","event_id":"sha256:2c3d9b5f05393d831cbf1040e8c04ef06818431ddd9f5313de302625d27393cd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C3JBNQ2GXOX44TQCUJ6IBO3TUU/bundle.json","state_url":"https://pith.science/pith/C3JBNQ2GXOX44TQCUJ6IBO3TUU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C3JBNQ2GXOX44TQCUJ6IBO3TUU/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":"2026-06-02T13:16:40Z","links":{"resolver":"https://pith.science/pith/C3JBNQ2GXOX44TQCUJ6IBO3TUU","bundle":"https://pith.science/pith/C3JBNQ2GXOX44TQCUJ6IBO3TUU/bundle.json","state":"https://pith.science/pith/C3JBNQ2GXOX44TQCUJ6IBO3TUU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C3JBNQ2GXOX44TQCUJ6IBO3TUU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:C3JBNQ2GXOX44TQCUJ6IBO3TUU","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":"9a390378bce1447e3906fce3f543f14d6344e3180c752ec17686d94679df7d10","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-23T19:51:16Z","title_canon_sha256":"91c6ca4156c1c0d9660ce36378c709131c544ba6bddac52b94c015270815e191"},"schema_version":"1.0","source":{"id":"1807.08805","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.08805","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"arxiv_version","alias_value":"1807.08805v2","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.08805","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"pith_short_12","alias_value":"C3JBNQ2GXOX4","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"C3JBNQ2GXOX44TQC","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"C3JBNQ2G","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:2c3d9b5f05393d831cbf1040e8c04ef06818431ddd9f5313de302625d27393cd","target":"graph","created_at":"2026-05-17T23:51:39Z","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":"We identify a new kind of physically realizable exceptional point (EP) corresponding to degenerate coherent perfect absorption, in which two purely incoming solutions of the wave operator for electromagnetic or acoustic waves coalesce to a single state. Such non-hermitian degeneracies can occur at a real-valued frequency without any associated noise or non-linearity, in contrast to EPs in lasers. The absorption lineshape for the eigenchannel near the EP is quartic in frequency around its maximum in any dimension. In general, for the parameters at which an operator EP occurs, the associated sca","authors_text":"A. Douglas Stone, Chia Wei Hsu, Stefan Rotter, William R. Sweeney","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-23T19:51:16Z","title":"Perfectly absorbing exceptional points and chiral absorbers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.08805","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:d06befb41f9365e5d253f5c88534cd8f0169b38061275d0614583a2274500075","target":"record","created_at":"2026-05-17T23:51:39Z","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":"9a390378bce1447e3906fce3f543f14d6344e3180c752ec17686d94679df7d10","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-23T19:51:16Z","title_canon_sha256":"91c6ca4156c1c0d9660ce36378c709131c544ba6bddac52b94c015270815e191"},"schema_version":"1.0","source":{"id":"1807.08805","kind":"arxiv","version":2}},"canonical_sha256":"16d216c346bbafce4e02a27c80bb73a539de8cbf6a85ee26e1d73f11c20a2866","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16d216c346bbafce4e02a27c80bb73a539de8cbf6a85ee26e1d73f11c20a2866","first_computed_at":"2026-05-17T23:51:39.509244Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:39.509244Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PEjIwLdspSv2lj/4Yc3PQygZhp6iYbDM/qYmvRco5NgOCOP6nlS3UL7zWQyqEnQ8WbAC7S/0pFFDweLa9OaLBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:39.509816Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.08805","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d06befb41f9365e5d253f5c88534cd8f0169b38061275d0614583a2274500075","sha256:2c3d9b5f05393d831cbf1040e8c04ef06818431ddd9f5313de302625d27393cd"],"state_sha256":"b9919145d94404adc521a87472932a1220af6c384c2de06dc1517b5ba3c5b337"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"azJDinqCqULygJlFfd1vwu3sAH/B7cLPp/G2GNSDIFYzb3QFTQyJWVrDdSmorUyq9cGFCvZo8nzh8btdZeRjAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T13:16:40.584981Z","bundle_sha256":"ecf468a2623ddd96e5612ee00c46e0c989ec11cbf3ae90501d23e1fc3421c8b4"}}