{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:R3JCQWYX7KBSE7OJFDBLHVK4S6","short_pith_number":"pith:R3JCQWYX","canonical_record":{"source":{"id":"1806.10910","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-28T12:16:13Z","cross_cats_sorted":[],"title_canon_sha256":"b81e6f8743d842993390cc7b53584c814fd9d741fbc3d4c3cb1346e6724af202","abstract_canon_sha256":"3f2ffb55a3b11e6978b0f3192313b3db727ca8d1a21661f21dafbb196db49e26"},"schema_version":"1.0"},"canonical_sha256":"8ed2285b17fa83227dc928c2b3d55c978c682e82cc49d8abd2c903e16a20bc6a","source":{"kind":"arxiv","id":"1806.10910","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.10910","created_at":"2026-05-18T00:12:07Z"},{"alias_kind":"arxiv_version","alias_value":"1806.10910v1","created_at":"2026-05-18T00:12:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.10910","created_at":"2026-05-18T00:12:07Z"},{"alias_kind":"pith_short_12","alias_value":"R3JCQWYX7KBS","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"R3JCQWYX7KBSE7OJ","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"R3JCQWYX","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:R3JCQWYX7KBSE7OJFDBLHVK4S6","target":"record","payload":{"canonical_record":{"source":{"id":"1806.10910","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-28T12:16:13Z","cross_cats_sorted":[],"title_canon_sha256":"b81e6f8743d842993390cc7b53584c814fd9d741fbc3d4c3cb1346e6724af202","abstract_canon_sha256":"3f2ffb55a3b11e6978b0f3192313b3db727ca8d1a21661f21dafbb196db49e26"},"schema_version":"1.0"},"canonical_sha256":"8ed2285b17fa83227dc928c2b3d55c978c682e82cc49d8abd2c903e16a20bc6a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:07.632549Z","signature_b64":"1piO4q6ttjwShFeR3loTc1sZvMkX6sI8gqLXzJLKoNFhpYmw0iBn2lLLahcWagnalch4XFgw7AJii0nHV5UDCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ed2285b17fa83227dc928c2b3d55c978c682e82cc49d8abd2c903e16a20bc6a","last_reissued_at":"2026-05-18T00:12:07.631909Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:07.631909Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.10910","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":"2026-05-18T00:12:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p5zbM/Kit9D5CqRNlsa9GGpdJTAhXGAiwDAePBZSgMvQZ1r6iZJQAU7N5gxfm0Z7Plff+T0/xRtTbIQ961+xDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:00:39.196437Z"},"content_sha256":"9e4e44d2f2a16c079c2587c82c8082d0807efaff7d70beeffe0a1e65b32d0570","schema_version":"1.0","event_id":"sha256:9e4e44d2f2a16c079c2587c82c8082d0807efaff7d70beeffe0a1e65b32d0570"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:R3JCQWYX7KBSE7OJFDBLHVK4S6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Machine learning with controllable quantum dynamics of a nuclear spin ensemble in a solid","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Keisuke Fujii, Kohei Nakajima, Kosuke Mitarai, Makoto Negoro, Masahiro Kitagawa","submitted_at":"2018-06-28T12:16:13Z","abstract_excerpt":"We experimentally demonstrate quantum machine learning using NMR based on a framework of quantum reservoir computing. Reservoir computing is for exploiting natural nonlinear dynamics with large degrees of freedom, which is called a reservoir, for a machine learning purpose. Here we propose a concrete physical implementation of a quantum reservoir using controllable dynamics of a nuclear spin ensemble in a molecular solid. In this implementation, we demonstrate learning of nonlinear functions with binary or continuous variable inputs with low mean squared errors. Our implementation and demonstr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.10910","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":"2026-05-18T00:12:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Te0HrGnr7dZA0I/U+vKqbhhwuyMAX3EAOJOclGn1osKqGrvhcwSxLcg+J7fMcnqfP30ZxRESGKXtAbxowm/uBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:00:39.197149Z"},"content_sha256":"53375e795139d79c193c395055602c2d155ea4f13cf3ff49f0a0c03af8eac055","schema_version":"1.0","event_id":"sha256:53375e795139d79c193c395055602c2d155ea4f13cf3ff49f0a0c03af8eac055"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R3JCQWYX7KBSE7OJFDBLHVK4S6/bundle.json","state_url":"https://pith.science/pith/R3JCQWYX7KBSE7OJFDBLHVK4S6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R3JCQWYX7KBSE7OJFDBLHVK4S6/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":"2026-05-26T21:00:39Z","links":{"resolver":"https://pith.science/pith/R3JCQWYX7KBSE7OJFDBLHVK4S6","bundle":"https://pith.science/pith/R3JCQWYX7KBSE7OJFDBLHVK4S6/bundle.json","state":"https://pith.science/pith/R3JCQWYX7KBSE7OJFDBLHVK4S6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R3JCQWYX7KBSE7OJFDBLHVK4S6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:R3JCQWYX7KBSE7OJFDBLHVK4S6","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":"3f2ffb55a3b11e6978b0f3192313b3db727ca8d1a21661f21dafbb196db49e26","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-28T12:16:13Z","title_canon_sha256":"b81e6f8743d842993390cc7b53584c814fd9d741fbc3d4c3cb1346e6724af202"},"schema_version":"1.0","source":{"id":"1806.10910","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.10910","created_at":"2026-05-18T00:12:07Z"},{"alias_kind":"arxiv_version","alias_value":"1806.10910v1","created_at":"2026-05-18T00:12:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.10910","created_at":"2026-05-18T00:12:07Z"},{"alias_kind":"pith_short_12","alias_value":"R3JCQWYX7KBS","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"R3JCQWYX7KBSE7OJ","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"R3JCQWYX","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:53375e795139d79c193c395055602c2d155ea4f13cf3ff49f0a0c03af8eac055","target":"graph","created_at":"2026-05-18T00:12:07Z","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":"We experimentally demonstrate quantum machine learning using NMR based on a framework of quantum reservoir computing. Reservoir computing is for exploiting natural nonlinear dynamics with large degrees of freedom, which is called a reservoir, for a machine learning purpose. Here we propose a concrete physical implementation of a quantum reservoir using controllable dynamics of a nuclear spin ensemble in a molecular solid. In this implementation, we demonstrate learning of nonlinear functions with binary or continuous variable inputs with low mean squared errors. Our implementation and demonstr","authors_text":"Keisuke Fujii, Kohei Nakajima, Kosuke Mitarai, Makoto Negoro, Masahiro Kitagawa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-28T12:16:13Z","title":"Machine learning with controllable quantum dynamics of a nuclear spin ensemble in a solid"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.10910","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":"sha256:9e4e44d2f2a16c079c2587c82c8082d0807efaff7d70beeffe0a1e65b32d0570","target":"record","created_at":"2026-05-18T00:12:07Z","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":"3f2ffb55a3b11e6978b0f3192313b3db727ca8d1a21661f21dafbb196db49e26","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-28T12:16:13Z","title_canon_sha256":"b81e6f8743d842993390cc7b53584c814fd9d741fbc3d4c3cb1346e6724af202"},"schema_version":"1.0","source":{"id":"1806.10910","kind":"arxiv","version":1}},"canonical_sha256":"8ed2285b17fa83227dc928c2b3d55c978c682e82cc49d8abd2c903e16a20bc6a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ed2285b17fa83227dc928c2b3d55c978c682e82cc49d8abd2c903e16a20bc6a","first_computed_at":"2026-05-18T00:12:07.631909Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:12:07.631909Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1piO4q6ttjwShFeR3loTc1sZvMkX6sI8gqLXzJLKoNFhpYmw0iBn2lLLahcWagnalch4XFgw7AJii0nHV5UDCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:12:07.632549Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.10910","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e4e44d2f2a16c079c2587c82c8082d0807efaff7d70beeffe0a1e65b32d0570","sha256:53375e795139d79c193c395055602c2d155ea4f13cf3ff49f0a0c03af8eac055"],"state_sha256":"a8e4a69709429580dbfeea9895e0c22264b5f7c45b31399a2d394fe23be7287f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GXvi3OENZmzsOfLkbIVWxbkIBhvem5RShrvV2hlEB4Gn7ZykHH85Jo4khUW/fwv75SeLAQivhd7iLtx2X9upDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T21:00:39.201105Z","bundle_sha256":"8079d30367268b842f922ebb911474d75eb09b8b9de4170d5f3431b2ab322b44"}}