{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:3BCM6Z5ETKAWKV2DLQSLUXMUJB","short_pith_number":"pith:3BCM6Z5E","canonical_record":{"source":{"id":"2102.13171","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-02-25T20:54:48Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"615b21af3b866b2c8fc7e74e6ad56d93119e29b986be81d2a363f03e41b9950d","abstract_canon_sha256":"3dd1e48cb2012aada4482e3fba2ff463bc337a3862846a53683fb5f2854d1c95"},"schema_version":"1.0"},"canonical_sha256":"d844cf67a49a816557435c24ba5d94487dbbb611719b3e5e489ff77933a22c06","source":{"kind":"arxiv","id":"2102.13171","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.13171","created_at":"2026-07-05T02:23:27Z"},{"alias_kind":"arxiv_version","alias_value":"2102.13171v1","created_at":"2026-07-05T02:23:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.13171","created_at":"2026-07-05T02:23:27Z"},{"alias_kind":"pith_short_12","alias_value":"3BCM6Z5ETKAW","created_at":"2026-07-05T02:23:27Z"},{"alias_kind":"pith_short_16","alias_value":"3BCM6Z5ETKAWKV2D","created_at":"2026-07-05T02:23:27Z"},{"alias_kind":"pith_short_8","alias_value":"3BCM6Z5E","created_at":"2026-07-05T02:23:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:3BCM6Z5ETKAWKV2DLQSLUXMUJB","target":"record","payload":{"canonical_record":{"source":{"id":"2102.13171","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-02-25T20:54:48Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"615b21af3b866b2c8fc7e74e6ad56d93119e29b986be81d2a363f03e41b9950d","abstract_canon_sha256":"3dd1e48cb2012aada4482e3fba2ff463bc337a3862846a53683fb5f2854d1c95"},"schema_version":"1.0"},"canonical_sha256":"d844cf67a49a816557435c24ba5d94487dbbb611719b3e5e489ff77933a22c06","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:23:27.807572Z","signature_b64":"/LnVGBLAvrR9ZXPyRB5+8zLpp3uUxIdsmDtU8+RMVHDMci2dSN++WVr2ayC2L7cRwUN7AiP7/X7XsdIbakqiDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d844cf67a49a816557435c24ba5d94487dbbb611719b3e5e489ff77933a22c06","last_reissued_at":"2026-07-05T02:23:27.807068Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:23:27.807068Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.13171","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":"2026-07-05T02:23:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LLZp37gBru7TMgKpaDVbSa0Dvxq9xXbZnJYQRqi8fhR2zOcw8F9wr9gtMXUqAyN3zeLDgnrHKMymVEr4dL8WCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T07:12:17.767019Z"},"content_sha256":"3bde99ddb059c56ab696f7afff4ae9b984d39ca0cfe0fb66c48212355e54fb87","schema_version":"1.0","event_id":"sha256:3bde99ddb059c56ab696f7afff4ae9b984d39ca0cfe0fb66c48212355e54fb87"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:3BCM6Z5ETKAWKV2DLQSLUXMUJB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nuclear spin temperature reversal via continuous radio-frequency driving","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"physics.app-ph","authors_text":"Ashok Ajoy, Carlos A. Meriles, Daniela Pagliero, Jeffrey A. Reimer, Pablo R. Zangara, Rodolfo H. Acosta","submitted_at":"2021-02-25T20:54:48Z","abstract_excerpt":"Optical spin pumping of color centers in diamond is presently attracting broad interest as a platform for dynamic nuclear polarization at room temperature, but the mechanisms involved in the generation and transport of polarization within the host crystal are still partly understood. Here we investigate the impact of continuous radio-frequency (RF) excitation on the generation of nuclear magnetization produced by optical illumination. In the presence of RF excitation far removed from the nuclear Larmor frequency, we witness a magnetic-field-dependent sign reversal of the measured nuclear spin "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.13171","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/2102.13171/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":"2026-07-05T02:23:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zKxRyjCeMc72PthGffGv9wJf3GXuYAKXW4U4W5FxOkZRdND95Xpjk0ffL+3q+KUGBOJ9hrn7O0UgDvUzz+tGDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T07:12:17.767516Z"},"content_sha256":"b84bd511cf8d7d84395ede3b24f2db403569417b2fa7e1f433eb5b892521160e","schema_version":"1.0","event_id":"sha256:b84bd511cf8d7d84395ede3b24f2db403569417b2fa7e1f433eb5b892521160e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3BCM6Z5ETKAWKV2DLQSLUXMUJB/bundle.json","state_url":"https://pith.science/pith/3BCM6Z5ETKAWKV2DLQSLUXMUJB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3BCM6Z5ETKAWKV2DLQSLUXMUJB/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":"2026-08-06T07:12:17Z","links":{"resolver":"https://pith.science/pith/3BCM6Z5ETKAWKV2DLQSLUXMUJB","bundle":"https://pith.science/pith/3BCM6Z5ETKAWKV2DLQSLUXMUJB/bundle.json","state":"https://pith.science/pith/3BCM6Z5ETKAWKV2DLQSLUXMUJB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3BCM6Z5ETKAWKV2DLQSLUXMUJB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:3BCM6Z5ETKAWKV2DLQSLUXMUJB","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":"3dd1e48cb2012aada4482e3fba2ff463bc337a3862846a53683fb5f2854d1c95","cross_cats_sorted":["cond-mat.other"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-02-25T20:54:48Z","title_canon_sha256":"615b21af3b866b2c8fc7e74e6ad56d93119e29b986be81d2a363f03e41b9950d"},"schema_version":"1.0","source":{"id":"2102.13171","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.13171","created_at":"2026-07-05T02:23:27Z"},{"alias_kind":"arxiv_version","alias_value":"2102.13171v1","created_at":"2026-07-05T02:23:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.13171","created_at":"2026-07-05T02:23:27Z"},{"alias_kind":"pith_short_12","alias_value":"3BCM6Z5ETKAW","created_at":"2026-07-05T02:23:27Z"},{"alias_kind":"pith_short_16","alias_value":"3BCM6Z5ETKAWKV2D","created_at":"2026-07-05T02:23:27Z"},{"alias_kind":"pith_short_8","alias_value":"3BCM6Z5E","created_at":"2026-07-05T02:23:27Z"}],"graph_snapshots":[{"event_id":"sha256:b84bd511cf8d7d84395ede3b24f2db403569417b2fa7e1f433eb5b892521160e","target":"graph","created_at":"2026-07-05T02:23:27Z","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/2102.13171/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Optical spin pumping of color centers in diamond is presently attracting broad interest as a platform for dynamic nuclear polarization at room temperature, but the mechanisms involved in the generation and transport of polarization within the host crystal are still partly understood. Here we investigate the impact of continuous radio-frequency (RF) excitation on the generation of nuclear magnetization produced by optical illumination. In the presence of RF excitation far removed from the nuclear Larmor frequency, we witness a magnetic-field-dependent sign reversal of the measured nuclear spin ","authors_text":"Ashok Ajoy, Carlos A. Meriles, Daniela Pagliero, Jeffrey A. Reimer, Pablo R. Zangara, Rodolfo H. Acosta","cross_cats":["cond-mat.other"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-02-25T20:54:48Z","title":"Nuclear spin temperature reversal via continuous radio-frequency driving"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.13171","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":"sha256:3bde99ddb059c56ab696f7afff4ae9b984d39ca0cfe0fb66c48212355e54fb87","target":"record","created_at":"2026-07-05T02:23:27Z","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":"3dd1e48cb2012aada4482e3fba2ff463bc337a3862846a53683fb5f2854d1c95","cross_cats_sorted":["cond-mat.other"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-02-25T20:54:48Z","title_canon_sha256":"615b21af3b866b2c8fc7e74e6ad56d93119e29b986be81d2a363f03e41b9950d"},"schema_version":"1.0","source":{"id":"2102.13171","kind":"arxiv","version":1}},"canonical_sha256":"d844cf67a49a816557435c24ba5d94487dbbb611719b3e5e489ff77933a22c06","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d844cf67a49a816557435c24ba5d94487dbbb611719b3e5e489ff77933a22c06","first_computed_at":"2026-07-05T02:23:27.807068Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:23:27.807068Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/LnVGBLAvrR9ZXPyRB5+8zLpp3uUxIdsmDtU8+RMVHDMci2dSN++WVr2ayC2L7cRwUN7AiP7/X7XsdIbakqiDg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:23:27.807572Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.13171","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3bde99ddb059c56ab696f7afff4ae9b984d39ca0cfe0fb66c48212355e54fb87","sha256:b84bd511cf8d7d84395ede3b24f2db403569417b2fa7e1f433eb5b892521160e"],"state_sha256":"75ed3fc202a8120906ef15424d6889e94eb1536211adacf3ffdd9d105fda4969"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w2zueZlnYyZAvfQ+CxVs2O0ykDK1YIilUxu1OFcTkhtqWfpYcmb+bMhhgUmQWGJ483sI4NKz/hJ1ul4/aLApCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T07:12:17.771080Z","bundle_sha256":"9acfd41658d00df0f80a12d3583ef80aa647f5536ce4a0e6785e9b10c0a40a37"}}