{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:TP7XJPSPGGDKHOQJ323SU4SPSW","short_pith_number":"pith:TP7XJPSP","canonical_record":{"source":{"id":"2009.03021","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-09-07T11:25:12Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"33a42024f547777a32565f50389e1e5ea7597d9c9aac3cb4c6d0914f3a9d1a7a","abstract_canon_sha256":"5c58de73f7d753d233fcc8096b3322d59d62d825f12cd91942fbb9dc82ec510c"},"schema_version":"1.0"},"canonical_sha256":"9bff74be4f3186a3ba09deb72a724f959eba72b38d776a490af060a894c9e456","source":{"kind":"arxiv","id":"2009.03021","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.03021","created_at":"2026-07-05T04:50:48Z"},{"alias_kind":"arxiv_version","alias_value":"2009.03021v3","created_at":"2026-07-05T04:50:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.03021","created_at":"2026-07-05T04:50:48Z"},{"alias_kind":"pith_short_12","alias_value":"TP7XJPSPGGDK","created_at":"2026-07-05T04:50:48Z"},{"alias_kind":"pith_short_16","alias_value":"TP7XJPSPGGDKHOQJ","created_at":"2026-07-05T04:50:48Z"},{"alias_kind":"pith_short_8","alias_value":"TP7XJPSP","created_at":"2026-07-05T04:50:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:TP7XJPSPGGDKHOQJ323SU4SPSW","target":"record","payload":{"canonical_record":{"source":{"id":"2009.03021","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-09-07T11:25:12Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"33a42024f547777a32565f50389e1e5ea7597d9c9aac3cb4c6d0914f3a9d1a7a","abstract_canon_sha256":"5c58de73f7d753d233fcc8096b3322d59d62d825f12cd91942fbb9dc82ec510c"},"schema_version":"1.0"},"canonical_sha256":"9bff74be4f3186a3ba09deb72a724f959eba72b38d776a490af060a894c9e456","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:50:48.632697Z","signature_b64":"GZBMnj2XhCN0TtTkU1m+qREzdtikFlmZCCj0aAaJ0t2Su27tK8ebV0PfvcxPwm0YART7y77SyPBD7lxNsVYmDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9bff74be4f3186a3ba09deb72a724f959eba72b38d776a490af060a894c9e456","last_reissued_at":"2026-07-05T04:50:48.632298Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:50:48.632298Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.03021","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:50:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DWFYza43Jua6cqI1K/qr6GVfM2NTdJ2wrwvJwtOgcKhNjwF01DNMwfVAdibe2BeH8PqQLJ+JtDST0fqpLsULDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T14:31:49.402305Z"},"content_sha256":"e97c34e88f7cc21f663898933a38d0b83d3d532a37d13dd081df32e631211f67","schema_version":"1.0","event_id":"sha256:e97c34e88f7cc21f663898933a38d0b83d3d532a37d13dd081df32e631211f67"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:TP7XJPSPGGDKHOQJ323SU4SPSW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Coplanar Antenna Design for Microwave Entangled Signals Propagating in Open Air","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"quant-ph","authors_text":"Mikel Sanz, Tasio Gonzalez-Raya","submitted_at":"2020-09-07T11:25:12Z","abstract_excerpt":"Open-air microwave quantum communication and metrology protocols must be able to transfer quantum resources from a cryostat, where they are created, to an environment dominated by thermal noise. Indeed, the states carrying such quantum resources are generated in a cryostat characterized by a temperature $T_\\text{in} \\simeq 50 $~mK and an intrinsic impedance $Z_\\text{in} = 50 \\, \\Omega$. Then, an antenna-like device is required to transfer them with minimal losses into open air, characterized by an intrinsic impedance of $Z_\\text{out} = 377 \\, \\Omega$ and a temperature $T_\\text{out} \\simeq 300$"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.03021","kind":"arxiv","version":3},"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/2009.03021/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":"2026-07-05T04:50:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dFEGlobqfyjby0k8C1lxMg2ImFvjG69l1wqXECfD7j/nsT42MrBUObyZSm6c5I+3mWQXPWpQPFRrR5Um6tWAAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T14:31:49.402698Z"},"content_sha256":"39aced395913ef0307a5ba0347a3690541d30c834d060cad83da48017c92bbb5","schema_version":"1.0","event_id":"sha256:39aced395913ef0307a5ba0347a3690541d30c834d060cad83da48017c92bbb5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TP7XJPSPGGDKHOQJ323SU4SPSW/bundle.json","state_url":"https://pith.science/pith/TP7XJPSPGGDKHOQJ323SU4SPSW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TP7XJPSPGGDKHOQJ323SU4SPSW/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":"2026-07-06T14:31:49Z","links":{"resolver":"https://pith.science/pith/TP7XJPSPGGDKHOQJ323SU4SPSW","bundle":"https://pith.science/pith/TP7XJPSPGGDKHOQJ323SU4SPSW/bundle.json","state":"https://pith.science/pith/TP7XJPSPGGDKHOQJ323SU4SPSW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TP7XJPSPGGDKHOQJ323SU4SPSW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:TP7XJPSPGGDKHOQJ323SU4SPSW","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":"5c58de73f7d753d233fcc8096b3322d59d62d825f12cd91942fbb9dc82ec510c","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-09-07T11:25:12Z","title_canon_sha256":"33a42024f547777a32565f50389e1e5ea7597d9c9aac3cb4c6d0914f3a9d1a7a"},"schema_version":"1.0","source":{"id":"2009.03021","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.03021","created_at":"2026-07-05T04:50:48Z"},{"alias_kind":"arxiv_version","alias_value":"2009.03021v3","created_at":"2026-07-05T04:50:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.03021","created_at":"2026-07-05T04:50:48Z"},{"alias_kind":"pith_short_12","alias_value":"TP7XJPSPGGDK","created_at":"2026-07-05T04:50:48Z"},{"alias_kind":"pith_short_16","alias_value":"TP7XJPSPGGDKHOQJ","created_at":"2026-07-05T04:50:48Z"},{"alias_kind":"pith_short_8","alias_value":"TP7XJPSP","created_at":"2026-07-05T04:50:48Z"}],"graph_snapshots":[{"event_id":"sha256:39aced395913ef0307a5ba0347a3690541d30c834d060cad83da48017c92bbb5","target":"graph","created_at":"2026-07-05T04:50:48Z","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/2009.03021/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Open-air microwave quantum communication and metrology protocols must be able to transfer quantum resources from a cryostat, where they are created, to an environment dominated by thermal noise. Indeed, the states carrying such quantum resources are generated in a cryostat characterized by a temperature $T_\\text{in} \\simeq 50 $~mK and an intrinsic impedance $Z_\\text{in} = 50 \\, \\Omega$. Then, an antenna-like device is required to transfer them with minimal losses into open air, characterized by an intrinsic impedance of $Z_\\text{out} = 377 \\, \\Omega$ and a temperature $T_\\text{out} \\simeq 300$","authors_text":"Mikel Sanz, Tasio Gonzalez-Raya","cross_cats":["physics.app-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-09-07T11:25:12Z","title":"Coplanar Antenna Design for Microwave Entangled Signals Propagating in Open Air"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.03021","kind":"arxiv","version":3},"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:e97c34e88f7cc21f663898933a38d0b83d3d532a37d13dd081df32e631211f67","target":"record","created_at":"2026-07-05T04:50:48Z","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":"5c58de73f7d753d233fcc8096b3322d59d62d825f12cd91942fbb9dc82ec510c","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-09-07T11:25:12Z","title_canon_sha256":"33a42024f547777a32565f50389e1e5ea7597d9c9aac3cb4c6d0914f3a9d1a7a"},"schema_version":"1.0","source":{"id":"2009.03021","kind":"arxiv","version":3}},"canonical_sha256":"9bff74be4f3186a3ba09deb72a724f959eba72b38d776a490af060a894c9e456","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9bff74be4f3186a3ba09deb72a724f959eba72b38d776a490af060a894c9e456","first_computed_at":"2026-07-05T04:50:48.632298Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:50:48.632298Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GZBMnj2XhCN0TtTkU1m+qREzdtikFlmZCCj0aAaJ0t2Su27tK8ebV0PfvcxPwm0YART7y77SyPBD7lxNsVYmDg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:50:48.632697Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.03021","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e97c34e88f7cc21f663898933a38d0b83d3d532a37d13dd081df32e631211f67","sha256:39aced395913ef0307a5ba0347a3690541d30c834d060cad83da48017c92bbb5"],"state_sha256":"1658fcce4535a2bfd324c284abbbc243b87a28a353372d7aa244d717ac0ca6ba"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lUa12G7PhxMYjmUWVw4vldVdwYpF8y1PE10T8j68UYHSnoQW+AH/qEP6vzGFxx8kOjKdJFTa/LQ8ei8goehuAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T14:31:49.404681Z","bundle_sha256":"00e2e2df916fbf7bee882be479976f0db553433c5ee55a518d6e50b129633d20"}}