{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:F7VM4I4NHTTQURHQILI2YW2VJC","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":"71d34c612f21b363fed6467f852c165f434b803aece2d734db9fa2f0baf1f187","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2004-04-27T22:44:25Z","title_canon_sha256":"0944f19ba8e54380fabdea5f24964520fee18bfaadae6f6be8b1d133d799b995"},"schema_version":"1.0","source":{"id":"cond-mat/0404659","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0404659","created_at":"2026-05-18T04:30:24Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0404659v3","created_at":"2026-05-18T04:30:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0404659","created_at":"2026-05-18T04:30:24Z"},{"alias_kind":"pith_short_12","alias_value":"F7VM4I4NHTTQ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"F7VM4I4NHTTQURHQ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"F7VM4I4N","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:87bb7afa0754fd8f924bf0c478b29868cba0803a36478bd507665a56f4aa3588","target":"graph","created_at":"2026-05-18T04:30:24Z","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":"This article traces a brief history of the use of single electron spins to compute. In classical computing schemes, a binary bit is represented by the spin polarization of a single electron confined in a quantum dot. If a weak magnetic field is present, the spin orientation becomes a binary variable which can encode logic 0 and logic 1. Coherent superposition of these two polarizations represent a qubit. By engineering the exchange interaction between closely spaced spins in neighboring quantum dots, it is possible to implement either classical or quantum logic gates.","authors_text":"S. Bandyopadhyay","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2004-04-27T22:44:25Z","title":"Computing with spins: From classical to quantum computing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0404659","kind":"arxiv","version":3},"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:c97f96dd7a5bb1262d8f8855aaaeba6e5e3fabfcc8cfaa7abfd7c8bbeb843cb4","target":"record","created_at":"2026-05-18T04:30:24Z","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":"71d34c612f21b363fed6467f852c165f434b803aece2d734db9fa2f0baf1f187","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2004-04-27T22:44:25Z","title_canon_sha256":"0944f19ba8e54380fabdea5f24964520fee18bfaadae6f6be8b1d133d799b995"},"schema_version":"1.0","source":{"id":"cond-mat/0404659","kind":"arxiv","version":3}},"canonical_sha256":"2feace238d3ce70a44f042d1ac5b5548a6e96af8e898b0e917a766e548f68517","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2feace238d3ce70a44f042d1ac5b5548a6e96af8e898b0e917a766e548f68517","first_computed_at":"2026-05-18T04:30:24.219351Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:30:24.219351Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1GYRjhAHfqFIUU4YQymzt6/3DdDrHIzEX4b92iH3jvzvRGxfQbihMOIZzC79b963L7+TA2ip4oMuOLY1RaNbCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:30:24.220033Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0404659","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c97f96dd7a5bb1262d8f8855aaaeba6e5e3fabfcc8cfaa7abfd7c8bbeb843cb4","sha256:87bb7afa0754fd8f924bf0c478b29868cba0803a36478bd507665a56f4aa3588"],"state_sha256":"7dffbfab8c3b36410c644a7a46b188b8e7527a0faa0c14103e1af2cabf19c470"}