{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:GQ2QTKI263HGAU6IT6JYOGA354","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":"0fb84aaa2a9d3b264d5580e93e1ad6e1c7c1b2a19828f6e3cbb632a4934c0432","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-22T10:12:40Z","title_canon_sha256":"308278ef80a2109b8d840f851827473737325d3fb31414b3f4395d747903bfcc"},"schema_version":"1.0","source":{"id":"1510.06565","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.06565","created_at":"2026-05-18T01:04:22Z"},{"alias_kind":"arxiv_version","alias_value":"1510.06565v1","created_at":"2026-05-18T01:04:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.06565","created_at":"2026-05-18T01:04:22Z"},{"alias_kind":"pith_short_12","alias_value":"GQ2QTKI263HG","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GQ2QTKI263HGAU6I","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GQ2QTKI2","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:70d732cc02be4c04284b958ba26ae433d73c6fb66a1fab499a73a70a5f5d2190","target":"graph","created_at":"2026-05-18T01:04:22Z","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 reviews efforts to build a new type of quantum device, which combines an ensemble of electronic spins with long coherence times, and a small-scale superconducting quantum processor. The goal is to store over long times arbitrary qubit states in orthogonal collective modes of the spin-ensemble, and to retrieve them on-demand. We first present the protocol devised for such a multi-mode quantum memory. We then describe a series of experimental results using NV center spins in diamond, which demonstrate its main building blocks: the transfer of arbitrary quantum states from a qubit in","authors_text":"A. Auffeves, B. Julsgaard, C. Grezes, D. Esteve, D. Vion, H. Abe, H. Sumiya, I. Diniz, J.-F. Roch, J. Isoya, K. Moelmer, K. Nakamura, P. Bertet, S. Onoda, T. Ohshima, T. Umeda, V. Jacques, Y. Kubo","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-22T10:12:40Z","title":"Towards a spin-ensemble quantum memory for superconducting qubits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.06565","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":"sha256:1d7f595ccf4e0871d6846a23694f3593c1e39c285d83995d0ce3d08d80964874","target":"record","created_at":"2026-05-18T01:04:22Z","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":"0fb84aaa2a9d3b264d5580e93e1ad6e1c7c1b2a19828f6e3cbb632a4934c0432","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-22T10:12:40Z","title_canon_sha256":"308278ef80a2109b8d840f851827473737325d3fb31414b3f4395d747903bfcc"},"schema_version":"1.0","source":{"id":"1510.06565","kind":"arxiv","version":1}},"canonical_sha256":"343509a91af6ce6053c89f9387181bef1d9ce0665937e9ccc18a93caa5d28c31","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"343509a91af6ce6053c89f9387181bef1d9ce0665937e9ccc18a93caa5d28c31","first_computed_at":"2026-05-18T01:04:22.276851Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:04:22.276851Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3iBcIrV2rSCaqV79Lk0ljXcCGS6uh4+0s2YZ5tYk21l+lq3xC/RO+SgdfdIi2zuwyMIIfyYcydRRv6NGL3HUDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:04:22.277497Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.06565","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1d7f595ccf4e0871d6846a23694f3593c1e39c285d83995d0ce3d08d80964874","sha256:70d732cc02be4c04284b958ba26ae433d73c6fb66a1fab499a73a70a5f5d2190"],"state_sha256":"d263058a82f145f79cc2b25b60a1f65c772b3d53bd8e5c76d79c0bf261d91382"}