{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:5IO6A75CQ5FAO36ROVNTPX6DKU","short_pith_number":"pith:5IO6A75C","schema_version":"1.0","canonical_sha256":"ea1de07fa2874a076fd1755b37dfc3553240dc717ef63ecb7c3cf77e76423336","source":{"kind":"arxiv","id":"0901.4249","version":1},"attestation_state":"computed","paper":{"title":"Polarization freezing of 10000 optically-cooled nuclear spins by coupling to a single electron","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"cond-mat.mes-hall","authors_text":"A. B. Krysa, A. I. Tartakovskii, E. A. Chekhovich, J. Skiba-Szymanska, M. N. Makhonin, M. S. Skolnick, V. D. Kulakovskii, V. I. Fal'ko","submitted_at":"2009-01-27T13:43:08Z","abstract_excerpt":"The nature of the nano-scale environment presents a major challenge for solid-state implementation of spin-based qubits. In this work, a single electron spin in an optically pumped nanometer-sized III-V semiconductor quantum dot is used to control a macroscopic nuclear spin of several thousand nuclei, freezing its decay and leading to spin life-times exceeding 100 seconds at low temperatures. Few-millisecond-fast optical initialization of the nuclear spin is followed by a slow decay exhibiting random telegraph signals at long delay times, arising from low probability electron jumps out of the "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0901.4249","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-01-27T13:43:08Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"3380f4c2de22f7b409d9af68844b08158096a4e50a0fa396b80f03839a464faa","abstract_canon_sha256":"97fea73e0403fb39cd81ac80c3a77f06be406e9330991e4ac08b7c813eac5deb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:55.679715Z","signature_b64":"n75wNDO/AFzyEBTFVSdR9FXB2IqFiRiBAOzuubMLnYFqZF4srvz1+NKe9VFJ0e8E9eawZHq2W41s1GMPUbKDCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ea1de07fa2874a076fd1755b37dfc3553240dc717ef63ecb7c3cf77e76423336","last_reissued_at":"2026-05-18T02:14:55.679224Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:55.679224Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Polarization freezing of 10000 optically-cooled nuclear spins by coupling to a single electron","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"cond-mat.mes-hall","authors_text":"A. B. Krysa, A. I. Tartakovskii, E. A. Chekhovich, J. Skiba-Szymanska, M. N. Makhonin, M. S. Skolnick, V. D. Kulakovskii, V. I. Fal'ko","submitted_at":"2009-01-27T13:43:08Z","abstract_excerpt":"The nature of the nano-scale environment presents a major challenge for solid-state implementation of spin-based qubits. In this work, a single electron spin in an optically pumped nanometer-sized III-V semiconductor quantum dot is used to control a macroscopic nuclear spin of several thousand nuclei, freezing its decay and leading to spin life-times exceeding 100 seconds at low temperatures. Few-millisecond-fast optical initialization of the nuclear spin is followed by a slow decay exhibiting random telegraph signals at long delay times, arising from low probability electron jumps out of the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.4249","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0901.4249","created_at":"2026-05-18T02:14:55.679291+00:00"},{"alias_kind":"arxiv_version","alias_value":"0901.4249v1","created_at":"2026-05-18T02:14:55.679291+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.4249","created_at":"2026-05-18T02:14:55.679291+00:00"},{"alias_kind":"pith_short_12","alias_value":"5IO6A75CQ5FA","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_16","alias_value":"5IO6A75CQ5FAO36R","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_8","alias_value":"5IO6A75C","created_at":"2026-05-18T12:25:58.837520+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/5IO6A75CQ5FAO36ROVNTPX6DKU","json":"https://pith.science/pith/5IO6A75CQ5FAO36ROVNTPX6DKU.json","graph_json":"https://pith.science/api/pith-number/5IO6A75CQ5FAO36ROVNTPX6DKU/graph.json","events_json":"https://pith.science/api/pith-number/5IO6A75CQ5FAO36ROVNTPX6DKU/events.json","paper":"https://pith.science/paper/5IO6A75C"},"agent_actions":{"view_html":"https://pith.science/pith/5IO6A75CQ5FAO36ROVNTPX6DKU","download_json":"https://pith.science/pith/5IO6A75CQ5FAO36ROVNTPX6DKU.json","view_paper":"https://pith.science/paper/5IO6A75C","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0901.4249&json=true","fetch_graph":"https://pith.science/api/pith-number/5IO6A75CQ5FAO36ROVNTPX6DKU/graph.json","fetch_events":"https://pith.science/api/pith-number/5IO6A75CQ5FAO36ROVNTPX6DKU/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/5IO6A75CQ5FAO36ROVNTPX6DKU/action/timestamp_anchor","attest_storage":"https://pith.science/pith/5IO6A75CQ5FAO36ROVNTPX6DKU/action/storage_attestation","attest_author":"https://pith.science/pith/5IO6A75CQ5FAO36ROVNTPX6DKU/action/author_attestation","sign_citation":"https://pith.science/pith/5IO6A75CQ5FAO36ROVNTPX6DKU/action/citation_signature","submit_replication":"https://pith.science/pith/5IO6A75CQ5FAO36ROVNTPX6DKU/action/replication_record"}},"created_at":"2026-05-18T02:14:55.679291+00:00","updated_at":"2026-05-18T02:14:55.679291+00:00"}