{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:UMTPJYHB5UX56RNZR2WV6LTV26","short_pith_number":"pith:UMTPJYHB","canonical_record":{"source":{"id":"2011.10148","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-11-19T23:34:52Z","cross_cats_sorted":[],"title_canon_sha256":"b0c7baa5486e4f88a634052b3e34aa09565a78cdd9414fe9b6cfab6815aad6e7","abstract_canon_sha256":"fb17b4bcf68676211fa2efe02290f1fce0bffae5b3e59c4b6bf0f5f02bc8f91c"},"schema_version":"1.0"},"canonical_sha256":"a326f4e0e1ed2fdf45b98ead5f2e75d794a6657cf6aadf116ed7aa51540e91b0","source":{"kind":"arxiv","id":"2011.10148","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.10148","created_at":"2026-07-05T02:25:28Z"},{"alias_kind":"arxiv_version","alias_value":"2011.10148v1","created_at":"2026-07-05T02:25:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.10148","created_at":"2026-07-05T02:25:28Z"},{"alias_kind":"pith_short_12","alias_value":"UMTPJYHB5UX5","created_at":"2026-07-05T02:25:28Z"},{"alias_kind":"pith_short_16","alias_value":"UMTPJYHB5UX56RNZ","created_at":"2026-07-05T02:25:28Z"},{"alias_kind":"pith_short_8","alias_value":"UMTPJYHB","created_at":"2026-07-05T02:25:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:UMTPJYHB5UX56RNZR2WV6LTV26","target":"record","payload":{"canonical_record":{"source":{"id":"2011.10148","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-11-19T23:34:52Z","cross_cats_sorted":[],"title_canon_sha256":"b0c7baa5486e4f88a634052b3e34aa09565a78cdd9414fe9b6cfab6815aad6e7","abstract_canon_sha256":"fb17b4bcf68676211fa2efe02290f1fce0bffae5b3e59c4b6bf0f5f02bc8f91c"},"schema_version":"1.0"},"canonical_sha256":"a326f4e0e1ed2fdf45b98ead5f2e75d794a6657cf6aadf116ed7aa51540e91b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:25:28.946859Z","signature_b64":"kZ5yG2Mj9XHWty6lsz1ZiSR5TVaJgQBL25CIwhEtHkxLPG07iGx6RCyna8Dgh1bH5YfLJ/tIEe06O9fBaeWVDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a326f4e0e1ed2fdf45b98ead5f2e75d794a6657cf6aadf116ed7aa51540e91b0","last_reissued_at":"2026-07-05T02:25:28.946349Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:25:28.946349Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.10148","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":"2026-07-05T02:25:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DOZ9T6R24VVfE5sh07swGEUnwsu4UouohAVNKIvK7acKSCmImvh1fD215W+E+IEojuBdr/j/N8cJWKwAbdvQDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T19:29:56.756694Z"},"content_sha256":"a5751f7f000b165cc1c0a3b3e1f88621730ea937f7bb18b8747dd3392dc8b5ee","schema_version":"1.0","event_id":"sha256:a5751f7f000b165cc1c0a3b3e1f88621730ea937f7bb18b8747dd3392dc8b5ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:UMTPJYHB5UX56RNZR2WV6LTV26","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Switchable X-ray Orbital Angular Momentum from an Artificial Spin Ice","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Andreas Scholl, Anton Tremsin, Barry Farmer, Claudio Mazzoli, J. Todd Hastings, Justin Woods, Lance E. De Long, Rajesh V. Chopdekar, Roland Koch, Steve Kevan, Stuart Wilkins, Sujoy Roy, Wai-Kwong Kwok, Wen Hu, Xiaoqian M Chen","submitted_at":"2020-11-19T23:34:52Z","abstract_excerpt":"Artificial spin ices (ASI) have been widely investigated as magnetic metamaterials with exotic properties governed by their geometries. In parallel, interest in X-ray photon orbital angular momentum (OAM) has been rapidly growing. Here we show that a square ASI with a programmed topological defect, a double edge dislocation, imparts OAM to scattered X-rays. Unlike single dislocations, a double dislocation does not introduce magnetic frustration, and the ASI equilibrates to its antiferromagnetic (AF) ground state. The topological charge of the defect differs with respect to the structural and m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.10148","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/2011.10148/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":"2026-07-05T02:25:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nkuj+jwvrBR+Vfe6afsGiiXlikXpzgihW0VGTVFOI60eqeJbO9ebzcIbWVJdARvLocuoMahSqO7sbpS+/jy3CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T19:29:56.757230Z"},"content_sha256":"04f3545e78936e0ef737c622af4ba19603a19520416ba0ef1bcac9cd695e335f","schema_version":"1.0","event_id":"sha256:04f3545e78936e0ef737c622af4ba19603a19520416ba0ef1bcac9cd695e335f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UMTPJYHB5UX56RNZR2WV6LTV26/bundle.json","state_url":"https://pith.science/pith/UMTPJYHB5UX56RNZR2WV6LTV26/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UMTPJYHB5UX56RNZR2WV6LTV26/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":"2026-08-04T19:29:56Z","links":{"resolver":"https://pith.science/pith/UMTPJYHB5UX56RNZR2WV6LTV26","bundle":"https://pith.science/pith/UMTPJYHB5UX56RNZR2WV6LTV26/bundle.json","state":"https://pith.science/pith/UMTPJYHB5UX56RNZR2WV6LTV26/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UMTPJYHB5UX56RNZR2WV6LTV26/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:UMTPJYHB5UX56RNZR2WV6LTV26","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":"fb17b4bcf68676211fa2efe02290f1fce0bffae5b3e59c4b6bf0f5f02bc8f91c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-11-19T23:34:52Z","title_canon_sha256":"b0c7baa5486e4f88a634052b3e34aa09565a78cdd9414fe9b6cfab6815aad6e7"},"schema_version":"1.0","source":{"id":"2011.10148","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.10148","created_at":"2026-07-05T02:25:28Z"},{"alias_kind":"arxiv_version","alias_value":"2011.10148v1","created_at":"2026-07-05T02:25:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.10148","created_at":"2026-07-05T02:25:28Z"},{"alias_kind":"pith_short_12","alias_value":"UMTPJYHB5UX5","created_at":"2026-07-05T02:25:28Z"},{"alias_kind":"pith_short_16","alias_value":"UMTPJYHB5UX56RNZ","created_at":"2026-07-05T02:25:28Z"},{"alias_kind":"pith_short_8","alias_value":"UMTPJYHB","created_at":"2026-07-05T02:25:28Z"}],"graph_snapshots":[{"event_id":"sha256:04f3545e78936e0ef737c622af4ba19603a19520416ba0ef1bcac9cd695e335f","target":"graph","created_at":"2026-07-05T02:25:28Z","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/2011.10148/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Artificial spin ices (ASI) have been widely investigated as magnetic metamaterials with exotic properties governed by their geometries. In parallel, interest in X-ray photon orbital angular momentum (OAM) has been rapidly growing. Here we show that a square ASI with a programmed topological defect, a double edge dislocation, imparts OAM to scattered X-rays. Unlike single dislocations, a double dislocation does not introduce magnetic frustration, and the ASI equilibrates to its antiferromagnetic (AF) ground state. The topological charge of the defect differs with respect to the structural and m","authors_text":"Andreas Scholl, Anton Tremsin, Barry Farmer, Claudio Mazzoli, J. Todd Hastings, Justin Woods, Lance E. De Long, Rajesh V. Chopdekar, Roland Koch, Steve Kevan, Stuart Wilkins, Sujoy Roy, Wai-Kwong Kwok, Wen Hu, Xiaoqian M Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-11-19T23:34:52Z","title":"Switchable X-ray Orbital Angular Momentum from an Artificial Spin Ice"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.10148","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:a5751f7f000b165cc1c0a3b3e1f88621730ea937f7bb18b8747dd3392dc8b5ee","target":"record","created_at":"2026-07-05T02:25:28Z","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":"fb17b4bcf68676211fa2efe02290f1fce0bffae5b3e59c4b6bf0f5f02bc8f91c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-11-19T23:34:52Z","title_canon_sha256":"b0c7baa5486e4f88a634052b3e34aa09565a78cdd9414fe9b6cfab6815aad6e7"},"schema_version":"1.0","source":{"id":"2011.10148","kind":"arxiv","version":1}},"canonical_sha256":"a326f4e0e1ed2fdf45b98ead5f2e75d794a6657cf6aadf116ed7aa51540e91b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a326f4e0e1ed2fdf45b98ead5f2e75d794a6657cf6aadf116ed7aa51540e91b0","first_computed_at":"2026-07-05T02:25:28.946349Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:25:28.946349Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kZ5yG2Mj9XHWty6lsz1ZiSR5TVaJgQBL25CIwhEtHkxLPG07iGx6RCyna8Dgh1bH5YfLJ/tIEe06O9fBaeWVDA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:25:28.946859Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.10148","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a5751f7f000b165cc1c0a3b3e1f88621730ea937f7bb18b8747dd3392dc8b5ee","sha256:04f3545e78936e0ef737c622af4ba19603a19520416ba0ef1bcac9cd695e335f"],"state_sha256":"1503899e0866890c07b2ef80bf521aaa29edfab0c0a08d2ef929521be72a7c92"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oUzD5v68j1Awku9cuwBPBLAcl3vguBtldjGLrytvu62vmr+ah6xkKc+P96m4+hG+VpEMg9Sg2JgtfOySpwQiBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T19:29:56.763624Z","bundle_sha256":"98092f69ac9cd2c0b08191d64ec66345041a7465f00d7b84975b9b454c6fb5fd"}}