{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:JZQ5HY3H7R64GGESWKPBWD6PFL","short_pith_number":"pith:JZQ5HY3H","canonical_record":{"source":{"id":"cond-mat/0201549","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat","submitted_at":"2002-01-30T00:38:21Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"050d08b9803b4be4f5dff8f46753c3d687b0740ef7d11d81a8da962bd12d2d7d","abstract_canon_sha256":"70dbcfb202786fd7e3dd80f1caec087cc43dc9dad5184dcb09580abb30769fea"},"schema_version":"1.0"},"canonical_sha256":"4e61d3e367fc7dc31892b29e1b0fcf2ad54e38600d33741234b705124bd245c0","source":{"kind":"arxiv","id":"cond-mat/0201549","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0201549","created_at":"2026-05-18T01:40:04Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0201549v1","created_at":"2026-05-18T01:40:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0201549","created_at":"2026-05-18T01:40:04Z"},{"alias_kind":"pith_short_12","alias_value":"JZQ5HY3H7R64","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"JZQ5HY3H7R64GGES","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"JZQ5HY3H","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:JZQ5HY3H7R64GGESWKPBWD6PFL","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/0201549","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat","submitted_at":"2002-01-30T00:38:21Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"050d08b9803b4be4f5dff8f46753c3d687b0740ef7d11d81a8da962bd12d2d7d","abstract_canon_sha256":"70dbcfb202786fd7e3dd80f1caec087cc43dc9dad5184dcb09580abb30769fea"},"schema_version":"1.0"},"canonical_sha256":"4e61d3e367fc7dc31892b29e1b0fcf2ad54e38600d33741234b705124bd245c0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:04.137515Z","signature_b64":"YqlpwHA1nUn+iUDS20QHVLu51+PsYa9RGuOBUqO2/yCfvvBm/1pff5GF5cav0evrDWAM+NIvP6W3bR9VkeIdCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4e61d3e367fc7dc31892b29e1b0fcf2ad54e38600d33741234b705124bd245c0","last_reissued_at":"2026-05-18T01:40:04.136657Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:04.136657Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/0201549","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":"2026-05-18T01:40:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PoIvUZRhS066HAMgUmXG+quHK5Le8QYdolCVlSFErdwYfJvdKCx6H82ZOXi9YJ9x/IyRekcC56P8PEO9Iwt+Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:47:23.677884Z"},"content_sha256":"41fbcf74b1f8196c6289c53663550ec2edd8e0e7c104bb178a3e936829d61bdc","schema_version":"1.0","event_id":"sha256:41fbcf74b1f8196c6289c53663550ec2edd8e0e7c104bb178a3e936829d61bdc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:JZQ5HY3H7R64GGESWKPBWD6PFL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Single Ion Implantation for Solid State Quantum Computer Development","license":"","headline":"","cross_cats":["quant-ph"],"primary_cat":"cond-mat","authors_text":"A. Persaud, D. H. Schneider, J. Meijer, J. P. Holder, J. W. McDonald, T. Schenkel","submitted_at":"2002-01-30T00:38:21Z","abstract_excerpt":"Several solid state quantum computer schemes are based on the manipulation of electron and nuclear spins of single donor atoms in a solid matrix. The fabrication of qubit arrays requires the placement of individual atoms with nanometer precision and high efficieny. In this article we describe first results from low dose, low energy implantations and our development of a low energy (<10keV), single ion implantation scheme for 31P(q+) ions. When 31P(q+) ions impinge on a wafer surface, their potential energy (9.3 keV for P15+) is released, and about 20 secondary electrons are emitted. The emissi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0201549","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":"2026-05-18T01:40:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"53QeCTIvDi23SpqFLAi8aNzgzpmr+HQJKOxHr8+VjEWnlgKu6a/HT0m1VKhB4WeY1PrNKlW6F0pK1vVtD8ueBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:47:23.678234Z"},"content_sha256":"186d9cfdb3c9a3aa790a199aa326b2b4d7f332b98805c23e9c06dc3dd9e0aa1e","schema_version":"1.0","event_id":"sha256:186d9cfdb3c9a3aa790a199aa326b2b4d7f332b98805c23e9c06dc3dd9e0aa1e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JZQ5HY3H7R64GGESWKPBWD6PFL/bundle.json","state_url":"https://pith.science/pith/JZQ5HY3H7R64GGESWKPBWD6PFL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JZQ5HY3H7R64GGESWKPBWD6PFL/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":"2026-06-03T14:47:23Z","links":{"resolver":"https://pith.science/pith/JZQ5HY3H7R64GGESWKPBWD6PFL","bundle":"https://pith.science/pith/JZQ5HY3H7R64GGESWKPBWD6PFL/bundle.json","state":"https://pith.science/pith/JZQ5HY3H7R64GGESWKPBWD6PFL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JZQ5HY3H7R64GGESWKPBWD6PFL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:JZQ5HY3H7R64GGESWKPBWD6PFL","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":"70dbcfb202786fd7e3dd80f1caec087cc43dc9dad5184dcb09580abb30769fea","cross_cats_sorted":["quant-ph"],"license":"","primary_cat":"cond-mat","submitted_at":"2002-01-30T00:38:21Z","title_canon_sha256":"050d08b9803b4be4f5dff8f46753c3d687b0740ef7d11d81a8da962bd12d2d7d"},"schema_version":"1.0","source":{"id":"cond-mat/0201549","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0201549","created_at":"2026-05-18T01:40:04Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0201549v1","created_at":"2026-05-18T01:40:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0201549","created_at":"2026-05-18T01:40:04Z"},{"alias_kind":"pith_short_12","alias_value":"JZQ5HY3H7R64","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"JZQ5HY3H7R64GGES","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"JZQ5HY3H","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:186d9cfdb3c9a3aa790a199aa326b2b4d7f332b98805c23e9c06dc3dd9e0aa1e","target":"graph","created_at":"2026-05-18T01:40:04Z","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":"Several solid state quantum computer schemes are based on the manipulation of electron and nuclear spins of single donor atoms in a solid matrix. The fabrication of qubit arrays requires the placement of individual atoms with nanometer precision and high efficieny. In this article we describe first results from low dose, low energy implantations and our development of a low energy (<10keV), single ion implantation scheme for 31P(q+) ions. When 31P(q+) ions impinge on a wafer surface, their potential energy (9.3 keV for P15+) is released, and about 20 secondary electrons are emitted. The emissi","authors_text":"A. Persaud, D. H. Schneider, J. Meijer, J. P. Holder, J. W. McDonald, T. Schenkel","cross_cats":["quant-ph"],"headline":"","license":"","primary_cat":"cond-mat","submitted_at":"2002-01-30T00:38:21Z","title":"Single Ion Implantation for Solid State Quantum Computer Development"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0201549","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":"sha256:41fbcf74b1f8196c6289c53663550ec2edd8e0e7c104bb178a3e936829d61bdc","target":"record","created_at":"2026-05-18T01:40:04Z","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":"70dbcfb202786fd7e3dd80f1caec087cc43dc9dad5184dcb09580abb30769fea","cross_cats_sorted":["quant-ph"],"license":"","primary_cat":"cond-mat","submitted_at":"2002-01-30T00:38:21Z","title_canon_sha256":"050d08b9803b4be4f5dff8f46753c3d687b0740ef7d11d81a8da962bd12d2d7d"},"schema_version":"1.0","source":{"id":"cond-mat/0201549","kind":"arxiv","version":1}},"canonical_sha256":"4e61d3e367fc7dc31892b29e1b0fcf2ad54e38600d33741234b705124bd245c0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4e61d3e367fc7dc31892b29e1b0fcf2ad54e38600d33741234b705124bd245c0","first_computed_at":"2026-05-18T01:40:04.136657Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:04.136657Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YqlpwHA1nUn+iUDS20QHVLu51+PsYa9RGuOBUqO2/yCfvvBm/1pff5GF5cav0evrDWAM+NIvP6W3bR9VkeIdCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:04.137515Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0201549","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:41fbcf74b1f8196c6289c53663550ec2edd8e0e7c104bb178a3e936829d61bdc","sha256:186d9cfdb3c9a3aa790a199aa326b2b4d7f332b98805c23e9c06dc3dd9e0aa1e"],"state_sha256":"457fe25761fc828483aef94fd611bea016721db0e0964da917d5309e7ab96891"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3fbw76weViBCTKh8q3KZbbt0FtyIrX0AQzqfc+yzkEHs58djDw6/munZ3U4AelxFcbXlaQR28e87+53ooRUgDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T14:47:23.680234Z","bundle_sha256":"f7d43bff6bab311fb6a9424e28a56fed4427d75bd8681c2ee8d3243bb7750367"}}