{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:WH6TVWIXMGJWH53DXT4P6ZXAC6","short_pith_number":"pith:WH6TVWIX","canonical_record":{"source":{"id":"2101.11528","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2021-01-27T16:33:03Z","cross_cats_sorted":[],"title_canon_sha256":"80db0a2db942d0868a6b3bdb240b6e572f34f23c5917cd8d4b546b14cfe6a12e","abstract_canon_sha256":"498b03de1edf6fc15763505106b0ce27a168ffdd35e5cf009513ef202c55cd5f"},"schema_version":"1.0"},"canonical_sha256":"b1fd3ad917619363f763bcf8ff66e017b5552c609b0585b607408af706ea2131","source":{"kind":"arxiv","id":"2101.11528","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.11528","created_at":"2026-07-05T02:36:32Z"},{"alias_kind":"arxiv_version","alias_value":"2101.11528v1","created_at":"2026-07-05T02:36:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.11528","created_at":"2026-07-05T02:36:32Z"},{"alias_kind":"pith_short_12","alias_value":"WH6TVWIXMGJW","created_at":"2026-07-05T02:36:32Z"},{"alias_kind":"pith_short_16","alias_value":"WH6TVWIXMGJWH53D","created_at":"2026-07-05T02:36:32Z"},{"alias_kind":"pith_short_8","alias_value":"WH6TVWIX","created_at":"2026-07-05T02:36:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:WH6TVWIXMGJWH53DXT4P6ZXAC6","target":"record","payload":{"canonical_record":{"source":{"id":"2101.11528","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2021-01-27T16:33:03Z","cross_cats_sorted":[],"title_canon_sha256":"80db0a2db942d0868a6b3bdb240b6e572f34f23c5917cd8d4b546b14cfe6a12e","abstract_canon_sha256":"498b03de1edf6fc15763505106b0ce27a168ffdd35e5cf009513ef202c55cd5f"},"schema_version":"1.0"},"canonical_sha256":"b1fd3ad917619363f763bcf8ff66e017b5552c609b0585b607408af706ea2131","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:36:32.205078Z","signature_b64":"zkKm2NHwCXNGj10+BVtGZVze7cPyFykLL18x4b4PwEQvClgqdemWssVpz61Z2uCiubZSAQNuwhBt1uMVEGTzAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b1fd3ad917619363f763bcf8ff66e017b5552c609b0585b607408af706ea2131","last_reissued_at":"2026-07-05T02:36:32.204577Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:36:32.204577Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.11528","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:36:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BtCs7JnmyHbWqBQ62JXvkQ73fn/qme7/JZiIEpDTh0gkDeJKNgKLiMjz9SdLCaGybOHBcEKSg3rM+yRQbPlPCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T04:50:27.120919Z"},"content_sha256":"56d9f1b92a2471b0c49f2095c1818481db3063b8c64bec4f05b9c47ddb7c3ace","schema_version":"1.0","event_id":"sha256:56d9f1b92a2471b0c49f2095c1818481db3063b8c64bec4f05b9c47ddb7c3ace"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:WH6TVWIXMGJWH53DXT4P6ZXAC6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detection of electron spin resonance down to 10 K using localized spoof surface plasmon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Anuvab Nandi, Chiranjib Mitra, Pronoy Das, Subhadip Roy","submitted_at":"2021-01-27T16:33:03Z","abstract_excerpt":"In this study, novel use of the electromagnetic field profile of a localized spoof surface plasmonic mode to detect electron spin resonance is being reported. The mode is supported on a resonator with a complementary metallic spiral structure, etched on the ground plane of a microstrip line having a characteristic impedance of 50 $\\Omega$. The change in characteristics of the mode of interest with lowering of temperature has been observed and analyzed. Electron spin resonance spectra of a standard paramagnetic sample, 2,2-diphenyl-1-picrylhydrazyl, are recorded using this resonator down to 10 "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.11528","kind":"arxiv","version":1},"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/2101.11528/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":"2026-07-05T02:36:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uIcqB6W0oK0OPTwYjV8a5LxqUVfoM+CRF47K/+9+zqPGKO0tQssJUWdc6+NLfzs9DDC3ODi15CCtj9pWz4IRCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T04:50:27.121425Z"},"content_sha256":"866e2b8bc3b84dd4dbb6448ec258829c4b4fc077ecf0dd3959ffd1d7ac476a45","schema_version":"1.0","event_id":"sha256:866e2b8bc3b84dd4dbb6448ec258829c4b4fc077ecf0dd3959ffd1d7ac476a45"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WH6TVWIXMGJWH53DXT4P6ZXAC6/bundle.json","state_url":"https://pith.science/pith/WH6TVWIXMGJWH53DXT4P6ZXAC6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WH6TVWIXMGJWH53DXT4P6ZXAC6/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":"2026-08-22T04:50:27Z","links":{"resolver":"https://pith.science/pith/WH6TVWIXMGJWH53DXT4P6ZXAC6","bundle":"https://pith.science/pith/WH6TVWIXMGJWH53DXT4P6ZXAC6/bundle.json","state":"https://pith.science/pith/WH6TVWIXMGJWH53DXT4P6ZXAC6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WH6TVWIXMGJWH53DXT4P6ZXAC6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:WH6TVWIXMGJWH53DXT4P6ZXAC6","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":"498b03de1edf6fc15763505106b0ce27a168ffdd35e5cf009513ef202c55cd5f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2021-01-27T16:33:03Z","title_canon_sha256":"80db0a2db942d0868a6b3bdb240b6e572f34f23c5917cd8d4b546b14cfe6a12e"},"schema_version":"1.0","source":{"id":"2101.11528","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.11528","created_at":"2026-07-05T02:36:32Z"},{"alias_kind":"arxiv_version","alias_value":"2101.11528v1","created_at":"2026-07-05T02:36:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.11528","created_at":"2026-07-05T02:36:32Z"},{"alias_kind":"pith_short_12","alias_value":"WH6TVWIXMGJW","created_at":"2026-07-05T02:36:32Z"},{"alias_kind":"pith_short_16","alias_value":"WH6TVWIXMGJWH53D","created_at":"2026-07-05T02:36:32Z"},{"alias_kind":"pith_short_8","alias_value":"WH6TVWIX","created_at":"2026-07-05T02:36:32Z"}],"graph_snapshots":[{"event_id":"sha256:866e2b8bc3b84dd4dbb6448ec258829c4b4fc077ecf0dd3959ffd1d7ac476a45","target":"graph","created_at":"2026-07-05T02:36:32Z","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/2101.11528/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this study, novel use of the electromagnetic field profile of a localized spoof surface plasmonic mode to detect electron spin resonance is being reported. The mode is supported on a resonator with a complementary metallic spiral structure, etched on the ground plane of a microstrip line having a characteristic impedance of 50 $\\Omega$. The change in characteristics of the mode of interest with lowering of temperature has been observed and analyzed. Electron spin resonance spectra of a standard paramagnetic sample, 2,2-diphenyl-1-picrylhydrazyl, are recorded using this resonator down to 10 ","authors_text":"Anuvab Nandi, Chiranjib Mitra, Pronoy Das, Subhadip Roy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2021-01-27T16:33:03Z","title":"Detection of electron spin resonance down to 10 K using localized spoof surface plasmon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.11528","kind":"arxiv","version":1},"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":"sha256:56d9f1b92a2471b0c49f2095c1818481db3063b8c64bec4f05b9c47ddb7c3ace","target":"record","created_at":"2026-07-05T02:36:32Z","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":"498b03de1edf6fc15763505106b0ce27a168ffdd35e5cf009513ef202c55cd5f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2021-01-27T16:33:03Z","title_canon_sha256":"80db0a2db942d0868a6b3bdb240b6e572f34f23c5917cd8d4b546b14cfe6a12e"},"schema_version":"1.0","source":{"id":"2101.11528","kind":"arxiv","version":1}},"canonical_sha256":"b1fd3ad917619363f763bcf8ff66e017b5552c609b0585b607408af706ea2131","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b1fd3ad917619363f763bcf8ff66e017b5552c609b0585b607408af706ea2131","first_computed_at":"2026-07-05T02:36:32.204577Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:36:32.204577Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zkKm2NHwCXNGj10+BVtGZVze7cPyFykLL18x4b4PwEQvClgqdemWssVpz61Z2uCiubZSAQNuwhBt1uMVEGTzAg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:36:32.205078Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.11528","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:56d9f1b92a2471b0c49f2095c1818481db3063b8c64bec4f05b9c47ddb7c3ace","sha256:866e2b8bc3b84dd4dbb6448ec258829c4b4fc077ecf0dd3959ffd1d7ac476a45"],"state_sha256":"a22b6f3800d870fd276cf950ed5a7035db682e289f700adbaa352103dd51cd39"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MMFZh+C9YCWqPJr44r11NN+ohP41HpaPEhX37GsA2VUL24J0qGSiVK/iuDTi9+EaD59YfCSN+E52R3e+U2WCAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T04:50:27.126501Z","bundle_sha256":"593ab1c073bb397c2dfd9b2afb26efd8b9c99fd7a30b538266366508a8a1b121"}}