{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:MYFFUAKNNIUQ7SRITDJENMWD5D","short_pith_number":"pith:MYFFUAKN","canonical_record":{"source":{"id":"1807.05572","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-07-15T16:23:21Z","cross_cats_sorted":[],"title_canon_sha256":"8aad2a352f7924872a91dc5e257eeb435917db26df8969ca667a9e1de787758c","abstract_canon_sha256":"b468e22405d8180673570cf357892f0401d593059526213c627a536cde83f451"},"schema_version":"1.0"},"canonical_sha256":"660a5a014d6a290fca2898d246b2c3e8dafad5e1d0b405a9f7ba9190da2f8876","source":{"kind":"arxiv","id":"1807.05572","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.05572","created_at":"2026-05-17T23:44:22Z"},{"alias_kind":"arxiv_version","alias_value":"1807.05572v1","created_at":"2026-05-17T23:44:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.05572","created_at":"2026-05-17T23:44:22Z"},{"alias_kind":"pith_short_12","alias_value":"MYFFUAKNNIUQ","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"MYFFUAKNNIUQ7SRI","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"MYFFUAKN","created_at":"2026-05-18T12:32:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:MYFFUAKNNIUQ7SRITDJENMWD5D","target":"record","payload":{"canonical_record":{"source":{"id":"1807.05572","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-07-15T16:23:21Z","cross_cats_sorted":[],"title_canon_sha256":"8aad2a352f7924872a91dc5e257eeb435917db26df8969ca667a9e1de787758c","abstract_canon_sha256":"b468e22405d8180673570cf357892f0401d593059526213c627a536cde83f451"},"schema_version":"1.0"},"canonical_sha256":"660a5a014d6a290fca2898d246b2c3e8dafad5e1d0b405a9f7ba9190da2f8876","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:22.581100Z","signature_b64":"BNpfdq+LrCUhfwos/oW3iYadXsu8LSIcvw62Hi/Sb/xNrRGSe6CzKwkZh0yVaGcWqGJhMknieKH818yJOU1TAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"660a5a014d6a290fca2898d246b2c3e8dafad5e1d0b405a9f7ba9190da2f8876","last_reissued_at":"2026-05-17T23:44:22.580488Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:22.580488Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.05572","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":"2026-05-17T23:44:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ujw9XDXWz4Gi5olk+10+JxTNgiXRApEDVH5J8BVd6ZQkHI12EqL17GQzKhj0jjWKu2CanCo2sdyvfR5T6zbbBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:23:24.175261Z"},"content_sha256":"3e7e70cb8b6c2f8ee1d6b197fe074a8e5f5216a925b4a88be5ef5ee70d2285c8","schema_version":"1.0","event_id":"sha256:3e7e70cb8b6c2f8ee1d6b197fe074a8e5f5216a925b4a88be5ef5ee70d2285c8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:MYFFUAKNNIUQ7SRITDJENMWD5D","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Efficient quantum algorithms for $GHZ$ and $W$ states, and implementation on the IBM quantum computer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alix Jeannerot, Chun Lam Chan, Cl\\'ement Javerzac-Galy, Diogo Cruz, Fabien Gremion, Jarla Thiesbrummel, Kenichi Komagata, Marc-Andr\\'e Dupertuis, Nicolas Macris, Romain Fournier, Tara Tosic","submitted_at":"2018-07-15T16:23:21Z","abstract_excerpt":"We propose efficient algorithms with logarithmic step complexities for the generation of entangled $GHZ_N$ and $W_N$ states useful for quantum networks, and we demonstrate an implementation on the IBM quantum computer up to $N=16$. Improved quality is then investigated using full quantum tomography for low-$N$ GHZ and W states. This is completed by parity oscillations and histogram distance for large $N$ GHZ and W states respectively. We are capable to robustly build states with about twice the number of quantum bits which were previously achieved. Finally we attempt quantum error correction o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.05572","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":"2026-05-17T23:44:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w25Fiy9OIxX9zVXMMWkr7DDaL6aySOSiaWG79BicFmeMdZzNfml5zz+aj1kz6AqZ0TcYYhMkVVPPGfZcOQKtDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:23:24.175628Z"},"content_sha256":"888f837959adbf39ce556b8a85c1fc6fdf197bcfed11e9068d91f22f6bd91421","schema_version":"1.0","event_id":"sha256:888f837959adbf39ce556b8a85c1fc6fdf197bcfed11e9068d91f22f6bd91421"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MYFFUAKNNIUQ7SRITDJENMWD5D/bundle.json","state_url":"https://pith.science/pith/MYFFUAKNNIUQ7SRITDJENMWD5D/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MYFFUAKNNIUQ7SRITDJENMWD5D/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":"2026-06-03T05:23:24Z","links":{"resolver":"https://pith.science/pith/MYFFUAKNNIUQ7SRITDJENMWD5D","bundle":"https://pith.science/pith/MYFFUAKNNIUQ7SRITDJENMWD5D/bundle.json","state":"https://pith.science/pith/MYFFUAKNNIUQ7SRITDJENMWD5D/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MYFFUAKNNIUQ7SRITDJENMWD5D/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:MYFFUAKNNIUQ7SRITDJENMWD5D","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":"b468e22405d8180673570cf357892f0401d593059526213c627a536cde83f451","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-07-15T16:23:21Z","title_canon_sha256":"8aad2a352f7924872a91dc5e257eeb435917db26df8969ca667a9e1de787758c"},"schema_version":"1.0","source":{"id":"1807.05572","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.05572","created_at":"2026-05-17T23:44:22Z"},{"alias_kind":"arxiv_version","alias_value":"1807.05572v1","created_at":"2026-05-17T23:44:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.05572","created_at":"2026-05-17T23:44:22Z"},{"alias_kind":"pith_short_12","alias_value":"MYFFUAKNNIUQ","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"MYFFUAKNNIUQ7SRI","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"MYFFUAKN","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:888f837959adbf39ce556b8a85c1fc6fdf197bcfed11e9068d91f22f6bd91421","target":"graph","created_at":"2026-05-17T23:44:22Z","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":"We propose efficient algorithms with logarithmic step complexities for the generation of entangled $GHZ_N$ and $W_N$ states useful for quantum networks, and we demonstrate an implementation on the IBM quantum computer up to $N=16$. Improved quality is then investigated using full quantum tomography for low-$N$ GHZ and W states. This is completed by parity oscillations and histogram distance for large $N$ GHZ and W states respectively. We are capable to robustly build states with about twice the number of quantum bits which were previously achieved. Finally we attempt quantum error correction o","authors_text":"Alix Jeannerot, Chun Lam Chan, Cl\\'ement Javerzac-Galy, Diogo Cruz, Fabien Gremion, Jarla Thiesbrummel, Kenichi Komagata, Marc-Andr\\'e Dupertuis, Nicolas Macris, Romain Fournier, Tara Tosic","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-07-15T16:23:21Z","title":"Efficient quantum algorithms for $GHZ$ and $W$ states, and implementation on the IBM quantum computer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.05572","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":"sha256:3e7e70cb8b6c2f8ee1d6b197fe074a8e5f5216a925b4a88be5ef5ee70d2285c8","target":"record","created_at":"2026-05-17T23:44:22Z","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":"b468e22405d8180673570cf357892f0401d593059526213c627a536cde83f451","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-07-15T16:23:21Z","title_canon_sha256":"8aad2a352f7924872a91dc5e257eeb435917db26df8969ca667a9e1de787758c"},"schema_version":"1.0","source":{"id":"1807.05572","kind":"arxiv","version":1}},"canonical_sha256":"660a5a014d6a290fca2898d246b2c3e8dafad5e1d0b405a9f7ba9190da2f8876","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"660a5a014d6a290fca2898d246b2c3e8dafad5e1d0b405a9f7ba9190da2f8876","first_computed_at":"2026-05-17T23:44:22.580488Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:22.580488Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BNpfdq+LrCUhfwos/oW3iYadXsu8LSIcvw62Hi/Sb/xNrRGSe6CzKwkZh0yVaGcWqGJhMknieKH818yJOU1TAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:22.581100Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.05572","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e7e70cb8b6c2f8ee1d6b197fe074a8e5f5216a925b4a88be5ef5ee70d2285c8","sha256:888f837959adbf39ce556b8a85c1fc6fdf197bcfed11e9068d91f22f6bd91421"],"state_sha256":"1c770e69b4ced7023ed57aae0c739f583b9191e107275c0ea7a83bf6e965d4f3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hY11AvD89/5qR/qm8Ukax2qCEYTK6dedsm0IHkm30GUF+1nz6HvNFmB2QYyyhw1qJcihac+6mWh56qhQXIlqCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T05:23:24.177541Z","bundle_sha256":"a2af971828150493c267ca3e6cc68dacee4e3e26c00a49bd811d7fafe3fabd74"}}