{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:MY4HZLHALKWWZPN7PFXFYYLF63","short_pith_number":"pith:MY4HZLHA","canonical_record":{"source":{"id":"1308.3596","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-08-16T10:49:11Z","cross_cats_sorted":[],"title_canon_sha256":"6b851f4483beb8a0f69bc029f9205113288512b77cea2cf8f029d1f2de984089","abstract_canon_sha256":"45bdb6757c0ca842d9db4c64ba8048bf7a105066da2eebb26f10ed8413781ed4"},"schema_version":"1.0"},"canonical_sha256":"66387cace05aad6cbdbf796e5c6165f6c266227782c76a0d3c8a654366b35773","source":{"kind":"arxiv","id":"1308.3596","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.3596","created_at":"2026-05-18T03:15:44Z"},{"alias_kind":"arxiv_version","alias_value":"1308.3596v1","created_at":"2026-05-18T03:15:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.3596","created_at":"2026-05-18T03:15:44Z"},{"alias_kind":"pith_short_12","alias_value":"MY4HZLHALKWW","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"MY4HZLHALKWWZPN7","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"MY4HZLHA","created_at":"2026-05-18T12:27:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:MY4HZLHALKWWZPN7PFXFYYLF63","target":"record","payload":{"canonical_record":{"source":{"id":"1308.3596","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-08-16T10:49:11Z","cross_cats_sorted":[],"title_canon_sha256":"6b851f4483beb8a0f69bc029f9205113288512b77cea2cf8f029d1f2de984089","abstract_canon_sha256":"45bdb6757c0ca842d9db4c64ba8048bf7a105066da2eebb26f10ed8413781ed4"},"schema_version":"1.0"},"canonical_sha256":"66387cace05aad6cbdbf796e5c6165f6c266227782c76a0d3c8a654366b35773","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:15:44.455135Z","signature_b64":"T006RhOwq/98UsEMBhuqsCSr/9+eq1d+MB2nxTNRnqpvBnEF0mQS02LJM1xt9O/mY4Of0B/u9NTn08haCV9xAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66387cace05aad6cbdbf796e5c6165f6c266227782c76a0d3c8a654366b35773","last_reissued_at":"2026-05-18T03:15:44.454457Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:15:44.454457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.3596","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":"2026-05-18T03:15:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E660KpA82sjGMOCrnBO+zN29bW18VVeNPO229Y3a5WbelD/LT4gTC9pQV1HFKC8Az4IKMHXlJgMuXai/+VbeAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:06:17.120122Z"},"content_sha256":"5ffc7101ad4a44d25570f46842bbd0a18d97ca713f972a92713c84ba396f32df","schema_version":"1.0","event_id":"sha256:5ffc7101ad4a44d25570f46842bbd0a18d97ca713f972a92713c84ba396f32df"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:MY4HZLHALKWWZPN7PFXFYYLF63","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spin Selection Rule-Based Sub-Millisecond Hyperpolarization of Nuclear Spins in Silicon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"David P. Franke, Felix Hoehne, Kohei M. Itoh, Leonid S. Vlasenko, Lukas Dreher, Martin S. Brandt, Martin Stutzmann","submitted_at":"2013-08-16T10:49:11Z","abstract_excerpt":"In this work, we devise a fast and effective nuclear spin hyperpolarization scheme, which is in principle magnetic field and temperature independent. We use this scheme to experimentally demonstrate polarizations of up to 66% for phosphorus donor nuclear spins in bulk silicon, which are created within less than 100 us in a magnetic field of 0.35 T at a temperature of 5 K. The polarization scheme is based on a spin-dependent recombination process via weakly-coupled spin pairs, for which the recombination time constant strongly depends on the relative orientation of the two spins. We further use"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.3596","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":""},"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":"2026-05-18T03:15:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7eFRKwkJMTb4ZQdqhrLiK/iRTNOVhw6MOh7fIm/AVpwekRTHzcdy/Djm5O7pZKsnkBlmsXlDbAn2bk6jca86Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:06:17.120755Z"},"content_sha256":"50e737dbc56be0815e0ad39e3b2bcb8e302cc816431603f193b1cb2df4a2109b","schema_version":"1.0","event_id":"sha256:50e737dbc56be0815e0ad39e3b2bcb8e302cc816431603f193b1cb2df4a2109b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MY4HZLHALKWWZPN7PFXFYYLF63/bundle.json","state_url":"https://pith.science/pith/MY4HZLHALKWWZPN7PFXFYYLF63/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MY4HZLHALKWWZPN7PFXFYYLF63/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":"2026-05-25T23:06:17Z","links":{"resolver":"https://pith.science/pith/MY4HZLHALKWWZPN7PFXFYYLF63","bundle":"https://pith.science/pith/MY4HZLHALKWWZPN7PFXFYYLF63/bundle.json","state":"https://pith.science/pith/MY4HZLHALKWWZPN7PFXFYYLF63/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MY4HZLHALKWWZPN7PFXFYYLF63/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:MY4HZLHALKWWZPN7PFXFYYLF63","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":"45bdb6757c0ca842d9db4c64ba8048bf7a105066da2eebb26f10ed8413781ed4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-08-16T10:49:11Z","title_canon_sha256":"6b851f4483beb8a0f69bc029f9205113288512b77cea2cf8f029d1f2de984089"},"schema_version":"1.0","source":{"id":"1308.3596","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.3596","created_at":"2026-05-18T03:15:44Z"},{"alias_kind":"arxiv_version","alias_value":"1308.3596v1","created_at":"2026-05-18T03:15:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.3596","created_at":"2026-05-18T03:15:44Z"},{"alias_kind":"pith_short_12","alias_value":"MY4HZLHALKWW","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"MY4HZLHALKWWZPN7","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"MY4HZLHA","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:50e737dbc56be0815e0ad39e3b2bcb8e302cc816431603f193b1cb2df4a2109b","target":"graph","created_at":"2026-05-18T03:15:44Z","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"},"paper":{"abstract_excerpt":"In this work, we devise a fast and effective nuclear spin hyperpolarization scheme, which is in principle magnetic field and temperature independent. We use this scheme to experimentally demonstrate polarizations of up to 66% for phosphorus donor nuclear spins in bulk silicon, which are created within less than 100 us in a magnetic field of 0.35 T at a temperature of 5 K. The polarization scheme is based on a spin-dependent recombination process via weakly-coupled spin pairs, for which the recombination time constant strongly depends on the relative orientation of the two spins. We further use","authors_text":"David P. Franke, Felix Hoehne, Kohei M. Itoh, Leonid S. Vlasenko, Lukas Dreher, Martin S. Brandt, Martin Stutzmann","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-08-16T10:49:11Z","title":"Spin Selection Rule-Based Sub-Millisecond Hyperpolarization of Nuclear Spins in Silicon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.3596","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":"sha256:5ffc7101ad4a44d25570f46842bbd0a18d97ca713f972a92713c84ba396f32df","target":"record","created_at":"2026-05-18T03:15:44Z","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":"45bdb6757c0ca842d9db4c64ba8048bf7a105066da2eebb26f10ed8413781ed4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-08-16T10:49:11Z","title_canon_sha256":"6b851f4483beb8a0f69bc029f9205113288512b77cea2cf8f029d1f2de984089"},"schema_version":"1.0","source":{"id":"1308.3596","kind":"arxiv","version":1}},"canonical_sha256":"66387cace05aad6cbdbf796e5c6165f6c266227782c76a0d3c8a654366b35773","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66387cace05aad6cbdbf796e5c6165f6c266227782c76a0d3c8a654366b35773","first_computed_at":"2026-05-18T03:15:44.454457Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:15:44.454457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"T006RhOwq/98UsEMBhuqsCSr/9+eq1d+MB2nxTNRnqpvBnEF0mQS02LJM1xt9O/mY4Of0B/u9NTn08haCV9xAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:15:44.455135Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.3596","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ffc7101ad4a44d25570f46842bbd0a18d97ca713f972a92713c84ba396f32df","sha256:50e737dbc56be0815e0ad39e3b2bcb8e302cc816431603f193b1cb2df4a2109b"],"state_sha256":"658d368dff8b7d4537986b1d36cf33f673b0607ade4f7c83ddfe1e3440242c28"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kYPgisU+ANAZ7hewX/69gbeXvnviVCeka4GZIWG+xZOBHjjLkWoynaJwrPQ/pR7uoAp7b/YQ/adPoPjLm09UDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T23:06:17.123703Z","bundle_sha256":"547dd863cc1636f32776ed8c2dd6c2924f22f3ce38f632c0a19eb0560fef3c41"}}