{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:NA2YFCML3BRDZJXIPP5CBYRKKR","short_pith_number":"pith:NA2YFCML","canonical_record":{"source":{"id":"1812.11227","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-12-11T14:27:40Z","cross_cats_sorted":[],"title_canon_sha256":"bd7ba3811bd9e96d7e71abfaaa065ca878c5c31b02432654e49b50d9e8ccf5c2","abstract_canon_sha256":"6c8c60ffdab820310676a5e95e237c04785d91989ea9835c85c8a9b7ba7b0af9"},"schema_version":"1.0"},"canonical_sha256":"683582898bd8623ca6e87bfa20e22a5441b50ae7a949b4b8049b73f2a44e39d3","source":{"kind":"arxiv","id":"1812.11227","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.11227","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"arxiv_version","alias_value":"1812.11227v2","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.11227","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"pith_short_12","alias_value":"NA2YFCML3BRD","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NA2YFCML3BRDZJXI","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NA2YFCML","created_at":"2026-05-18T12:32:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:NA2YFCML3BRDZJXIPP5CBYRKKR","target":"record","payload":{"canonical_record":{"source":{"id":"1812.11227","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-12-11T14:27:40Z","cross_cats_sorted":[],"title_canon_sha256":"bd7ba3811bd9e96d7e71abfaaa065ca878c5c31b02432654e49b50d9e8ccf5c2","abstract_canon_sha256":"6c8c60ffdab820310676a5e95e237c04785d91989ea9835c85c8a9b7ba7b0af9"},"schema_version":"1.0"},"canonical_sha256":"683582898bd8623ca6e87bfa20e22a5441b50ae7a949b4b8049b73f2a44e39d3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:42.544763Z","signature_b64":"Y4twhAgP0zlYKD1IJPh6QS4iCni5NaXsP3FnCXhO4cuUws61DxkMIpF/6oXKnrV+AUAmz0UqjF1rPplDSUKLCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"683582898bd8623ca6e87bfa20e22a5441b50ae7a949b4b8049b73f2a44e39d3","last_reissued_at":"2026-05-17T23:54:42.544212Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:42.544212Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.11227","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":"2026-05-17T23:54:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oncSrBxqXxts0I/o01eTi3yJw+ZeJXgKxMoJXzrIE/mjayteUYAQi2TwOzGwCPgitlnxPkWfeaPvehS0WMZiCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T07:16:58.220392Z"},"content_sha256":"286f6b8cd5145c85c2738b30c9937ea813a6f5af4a14a77cbc5c1ed5c6338f92","schema_version":"1.0","event_id":"sha256:286f6b8cd5145c85c2738b30c9937ea813a6f5af4a14a77cbc5c1ed5c6338f92"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:NA2YFCML3BRDZJXIPP5CBYRKKR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Analytical and Numerical Analysis of Linear and Nonlinear Properties of an rf-SQUID Based Metasurface","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Bernhard Maier, Carsten Rockstuhl, Marlis Hochbruck, Marvin M. M\\\"uller","submitted_at":"2018-12-11T14:27:40Z","abstract_excerpt":"We derive a model to describe the interaction of an rf-SQUID (radio frequency superconducting quantum interference device) based metasurface with free space electromagnetic waves. The electromagnetic fields are described on the base of Maxwell's equations. For the rf-SQUID metasurface we rely on an equivalent circuit model. After a detailed derivation, we show that the problem that is described by a system of coupled differential equations is wellposed and, therefore, has a unique solution. In the small amplitude limit, we provide analytical expressions for reflection, transmission, and absorp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.11227","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":"2026-05-17T23:54:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XFH6xHglHW5A1YX4Gs5ZxsmXwnCEnYxqlri4q4BCS7Jpvp2AGb5tm+ouZxNYeQ+DUJjzVrlPefjvqK3Ku/1pDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T07:16:58.220762Z"},"content_sha256":"99ada252cae28cfce5bf72b610399d45fa0f1026394eb26723983b73746ec123","schema_version":"1.0","event_id":"sha256:99ada252cae28cfce5bf72b610399d45fa0f1026394eb26723983b73746ec123"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NA2YFCML3BRDZJXIPP5CBYRKKR/bundle.json","state_url":"https://pith.science/pith/NA2YFCML3BRDZJXIPP5CBYRKKR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NA2YFCML3BRDZJXIPP5CBYRKKR/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":"2026-05-20T07:16:58Z","links":{"resolver":"https://pith.science/pith/NA2YFCML3BRDZJXIPP5CBYRKKR","bundle":"https://pith.science/pith/NA2YFCML3BRDZJXIPP5CBYRKKR/bundle.json","state":"https://pith.science/pith/NA2YFCML3BRDZJXIPP5CBYRKKR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NA2YFCML3BRDZJXIPP5CBYRKKR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:NA2YFCML3BRDZJXIPP5CBYRKKR","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":"6c8c60ffdab820310676a5e95e237c04785d91989ea9835c85c8a9b7ba7b0af9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-12-11T14:27:40Z","title_canon_sha256":"bd7ba3811bd9e96d7e71abfaaa065ca878c5c31b02432654e49b50d9e8ccf5c2"},"schema_version":"1.0","source":{"id":"1812.11227","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.11227","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"arxiv_version","alias_value":"1812.11227v2","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.11227","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"pith_short_12","alias_value":"NA2YFCML3BRD","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NA2YFCML3BRDZJXI","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NA2YFCML","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:99ada252cae28cfce5bf72b610399d45fa0f1026394eb26723983b73746ec123","target":"graph","created_at":"2026-05-17T23:54:42Z","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 derive a model to describe the interaction of an rf-SQUID (radio frequency superconducting quantum interference device) based metasurface with free space electromagnetic waves. The electromagnetic fields are described on the base of Maxwell's equations. For the rf-SQUID metasurface we rely on an equivalent circuit model. After a detailed derivation, we show that the problem that is described by a system of coupled differential equations is wellposed and, therefore, has a unique solution. In the small amplitude limit, we provide analytical expressions for reflection, transmission, and absorp","authors_text":"Bernhard Maier, Carsten Rockstuhl, Marlis Hochbruck, Marvin M. M\\\"uller","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-12-11T14:27:40Z","title":"Analytical and Numerical Analysis of Linear and Nonlinear Properties of an rf-SQUID Based Metasurface"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.11227","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":"sha256:286f6b8cd5145c85c2738b30c9937ea813a6f5af4a14a77cbc5c1ed5c6338f92","target":"record","created_at":"2026-05-17T23:54:42Z","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":"6c8c60ffdab820310676a5e95e237c04785d91989ea9835c85c8a9b7ba7b0af9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-12-11T14:27:40Z","title_canon_sha256":"bd7ba3811bd9e96d7e71abfaaa065ca878c5c31b02432654e49b50d9e8ccf5c2"},"schema_version":"1.0","source":{"id":"1812.11227","kind":"arxiv","version":2}},"canonical_sha256":"683582898bd8623ca6e87bfa20e22a5441b50ae7a949b4b8049b73f2a44e39d3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"683582898bd8623ca6e87bfa20e22a5441b50ae7a949b4b8049b73f2a44e39d3","first_computed_at":"2026-05-17T23:54:42.544212Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:42.544212Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y4twhAgP0zlYKD1IJPh6QS4iCni5NaXsP3FnCXhO4cuUws61DxkMIpF/6oXKnrV+AUAmz0UqjF1rPplDSUKLCA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:42.544763Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.11227","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:286f6b8cd5145c85c2738b30c9937ea813a6f5af4a14a77cbc5c1ed5c6338f92","sha256:99ada252cae28cfce5bf72b610399d45fa0f1026394eb26723983b73746ec123"],"state_sha256":"3b01416eafe0aa54832d1dc575f7e08e880e30787ba8575598f7b9b98831d0c7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ERAnRM5xeScRfItUJSuVi3iqHtYiRAFukNDar2OumnsGtPbK3Ne+v5qLT9XPIKBs9Sz3PpuApANjmcRJ+dqZBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T07:16:58.222865Z","bundle_sha256":"d26b5a5ae4ba8dbe61e9bd72c4b12918d930c8f7f482612dc6ce00a58a1b3a90"}}