{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:OIC7K33GBHZ7SWCH6NPUVQU7DW","short_pith_number":"pith:OIC7K33G","canonical_record":{"source":{"id":"2511.11225","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-11-14T12:28:57Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"2befa56527c17defcc82fc493e7d8168beaab51aa1ba5021640f671651092c64","abstract_canon_sha256":"93b622efae3bb1a7f65ef907c5a5d478d81dc55e3ace6ea8c2f01a8f9b5518d5"},"schema_version":"1.0"},"canonical_sha256":"7205f56f6609f3f95847f35f4ac29f1d84030145d8bf99474e18efa5bbd4337b","source":{"kind":"arxiv","id":"2511.11225","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2511.11225","created_at":"2026-07-21T02:21:25Z"},{"alias_kind":"arxiv_version","alias_value":"2511.11225v4","created_at":"2026-07-21T02:21:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2511.11225","created_at":"2026-07-21T02:21:25Z"},{"alias_kind":"pith_short_12","alias_value":"OIC7K33GBHZ7","created_at":"2026-07-21T02:21:25Z"},{"alias_kind":"pith_short_16","alias_value":"OIC7K33GBHZ7SWCH","created_at":"2026-07-21T02:21:25Z"},{"alias_kind":"pith_short_8","alias_value":"OIC7K33G","created_at":"2026-07-21T02:21:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:OIC7K33GBHZ7SWCH6NPUVQU7DW","target":"record","payload":{"canonical_record":{"source":{"id":"2511.11225","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-11-14T12:28:57Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"2befa56527c17defcc82fc493e7d8168beaab51aa1ba5021640f671651092c64","abstract_canon_sha256":"93b622efae3bb1a7f65ef907c5a5d478d81dc55e3ace6ea8c2f01a8f9b5518d5"},"schema_version":"1.0"},"canonical_sha256":"7205f56f6609f3f95847f35f4ac29f1d84030145d8bf99474e18efa5bbd4337b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-21T02:21:25.500718Z","signature_b64":"htEmwbSsEgOixH00Lz8ktFV0Amhw8x5XjVVXDjYTFCJn2IbnTfc5ScaW/4dLVBVLSCP+EqxQZ84v1kZI63NeBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7205f56f6609f3f95847f35f4ac29f1d84030145d8bf99474e18efa5bbd4337b","last_reissued_at":"2026-07-21T02:21:25.499797Z","signature_status":"signed_v1","first_computed_at":"2026-07-21T02:21:25.499797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2511.11225","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-21T02:21:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1JV0LQY/o7uQOgc7dB9C0RqGbIaK5U4eZFAvL7cbcIUuTgOBZWMKQNDd+mjcnLT46r34eNQOdaaPKG8kmmPnBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T04:38:01.057451Z"},"content_sha256":"f124bba6d1600e3a63afe2128ea9e04ba02bc2542ba83d0294d6ed4cac28d777","schema_version":"1.0","event_id":"sha256:f124bba6d1600e3a63afe2128ea9e04ba02bc2542ba83d0294d6ed4cac28d777"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:OIC7K33GBHZ7SWCH6NPUVQU7DW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mutual Coupling in Continuous Aperture Arrays: Physical Modeling and Beamforming Design","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Giuseppe Thadeu Freitas de Abreu, Kuranage Roche Rayan Ranasinghe, Yuanwei Liu, Zhaolin Wang","submitted_at":"2025-11-14T12:28:57Z","abstract_excerpt":"The phenomenon of mutual coupling in continuous aperture arrays (CAPAs) is studied. First, a general physical model for the phenomenon that accounts for both polarization and surface dissipation losses is developed. Then, the unipolarized coupling kernel is characterized, revealing that polarization induces anisotropic coupling and invalidates the conventional half-wavelength spacing rule for coupling elimination. Next, the beamforming design problem for CAPAs with coupling is formulated as a functional optimization problem, leading to the derivation of optimal beamforming structures via the c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2511.11225","kind":"arxiv","version":4},"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/2511.11225/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":"2026-07-21T02:21:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xV3d1ddsr3IlTPN+I0dHM9xqj/LtHtxe0Cnfj2WdSrkJ91UjIRUbWyACGkpuLZ/6Vo9lNzA63i7nNrgqCoegBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T04:38:01.058249Z"},"content_sha256":"06bd340acf8a5ba7244fb972d48ed003498c8c241f336232c12e7b93d7ba520a","schema_version":"1.0","event_id":"sha256:06bd340acf8a5ba7244fb972d48ed003498c8c241f336232c12e7b93d7ba520a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OIC7K33GBHZ7SWCH6NPUVQU7DW/bundle.json","state_url":"https://pith.science/pith/OIC7K33GBHZ7SWCH6NPUVQU7DW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OIC7K33GBHZ7SWCH6NPUVQU7DW/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":"2026-08-11T04:38:01Z","links":{"resolver":"https://pith.science/pith/OIC7K33GBHZ7SWCH6NPUVQU7DW","bundle":"https://pith.science/pith/OIC7K33GBHZ7SWCH6NPUVQU7DW/bundle.json","state":"https://pith.science/pith/OIC7K33GBHZ7SWCH6NPUVQU7DW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OIC7K33GBHZ7SWCH6NPUVQU7DW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:OIC7K33GBHZ7SWCH6NPUVQU7DW","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":"93b622efae3bb1a7f65ef907c5a5d478d81dc55e3ace6ea8c2f01a8f9b5518d5","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-11-14T12:28:57Z","title_canon_sha256":"2befa56527c17defcc82fc493e7d8168beaab51aa1ba5021640f671651092c64"},"schema_version":"1.0","source":{"id":"2511.11225","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2511.11225","created_at":"2026-07-21T02:21:25Z"},{"alias_kind":"arxiv_version","alias_value":"2511.11225v4","created_at":"2026-07-21T02:21:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2511.11225","created_at":"2026-07-21T02:21:25Z"},{"alias_kind":"pith_short_12","alias_value":"OIC7K33GBHZ7","created_at":"2026-07-21T02:21:25Z"},{"alias_kind":"pith_short_16","alias_value":"OIC7K33GBHZ7SWCH","created_at":"2026-07-21T02:21:25Z"},{"alias_kind":"pith_short_8","alias_value":"OIC7K33G","created_at":"2026-07-21T02:21:25Z"}],"graph_snapshots":[{"event_id":"sha256:06bd340acf8a5ba7244fb972d48ed003498c8c241f336232c12e7b93d7ba520a","target":"graph","created_at":"2026-07-21T02:21:25Z","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/2511.11225/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The phenomenon of mutual coupling in continuous aperture arrays (CAPAs) is studied. First, a general physical model for the phenomenon that accounts for both polarization and surface dissipation losses is developed. Then, the unipolarized coupling kernel is characterized, revealing that polarization induces anisotropic coupling and invalidates the conventional half-wavelength spacing rule for coupling elimination. Next, the beamforming design problem for CAPAs with coupling is formulated as a functional optimization problem, leading to the derivation of optimal beamforming structures via the c","authors_text":"Giuseppe Thadeu Freitas de Abreu, Kuranage Roche Rayan Ranasinghe, Yuanwei Liu, Zhaolin Wang","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-11-14T12:28:57Z","title":"Mutual Coupling in Continuous Aperture Arrays: Physical Modeling and Beamforming Design"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2511.11225","kind":"arxiv","version":4},"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:f124bba6d1600e3a63afe2128ea9e04ba02bc2542ba83d0294d6ed4cac28d777","target":"record","created_at":"2026-07-21T02:21:25Z","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":"93b622efae3bb1a7f65ef907c5a5d478d81dc55e3ace6ea8c2f01a8f9b5518d5","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-11-14T12:28:57Z","title_canon_sha256":"2befa56527c17defcc82fc493e7d8168beaab51aa1ba5021640f671651092c64"},"schema_version":"1.0","source":{"id":"2511.11225","kind":"arxiv","version":4}},"canonical_sha256":"7205f56f6609f3f95847f35f4ac29f1d84030145d8bf99474e18efa5bbd4337b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7205f56f6609f3f95847f35f4ac29f1d84030145d8bf99474e18efa5bbd4337b","first_computed_at":"2026-07-21T02:21:25.499797Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-21T02:21:25.499797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"htEmwbSsEgOixH00Lz8ktFV0Amhw8x5XjVVXDjYTFCJn2IbnTfc5ScaW/4dLVBVLSCP+EqxQZ84v1kZI63NeBg==","signature_status":"signed_v1","signed_at":"2026-07-21T02:21:25.500718Z","signed_message":"canonical_sha256_bytes"},"source_id":"2511.11225","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f124bba6d1600e3a63afe2128ea9e04ba02bc2542ba83d0294d6ed4cac28d777","sha256:06bd340acf8a5ba7244fb972d48ed003498c8c241f336232c12e7b93d7ba520a"],"state_sha256":"d99e3250cdd7be51dad73f8e1ab04d29f812b6fde4eed5d40a94879e52fce1b2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yMkK75hNjtANFZggpxUOiD/bx85V9OOKLP+2ceJxEn9wFD7Nw5rQ2ykNnbOGKtSdwtmjTB9KMd3DZLeUFEEfBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T04:38:01.064711Z","bundle_sha256":"7e5b1f5b5fef0282e74f6ea6ceefff79cec6d2ae310b28e71aebc317efd5c11d"}}