{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:E4WOBEH5UHV7WES4CMHFPC3EXA","short_pith_number":"pith:E4WOBEH5","schema_version":"1.0","canonical_sha256":"272ce090fda1ebfb125c130e578b64b8145fc6d6905552a05a1453114d71a443","source":{"kind":"arxiv","id":"2607.04227","version":1},"attestation_state":"computed","paper":{"title":"Genuine Multipartite Entanglement between Logical Qubits via Cross-Code Lattice Surgery","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alex Steiner, Christian D. Marciniak, Hendrik Poulsen Nautrup, Ivan Pogorelov, Marcel Meyer, Nicolai Friis, Phila Rembold, Philipp Schindler, Robert Freund, Thomas Monz, Tomasz Andrzejewski","submitted_at":"2026-07-05T11:01:11Z","abstract_excerpt":"Universal quantum computers are expected to generate arbitrary complex quantum states of logical qubits encoded in many physical qubits. This capability hinges on a fault-tolerantly implemented universal gate set, which no single quantum error-correction code admits transversally but which becomes accessible by joining complementary codes via lattice surgery. Here we report on the experimental generation and certification of logical genuine multipartite entanglement in a trapped-ion quantum processor using a transversally implemented universal logical gate set. The gate set is accessed via lat"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2607.04227","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-07-05T11:01:11Z","cross_cats_sorted":[],"title_canon_sha256":"adedbe5c113ef3f6658981d77409226b318391abee27cee6ecaec8b4dd0b6542","abstract_canon_sha256":"f880887eb7b2e4aff3b5b102f2121b2e91ac11829ac7fe14c66c3749b0bca7b1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-07T02:19:04.154762Z","signature_b64":"gGnfISiYiFSRRvPUdGWCjHefO/ZDW+0w1p60OJ9nnOdKDxb8MEzkbk3z6KPT7dGQ1BwBa7sVOlKz39bwH4G2CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"272ce090fda1ebfb125c130e578b64b8145fc6d6905552a05a1453114d71a443","last_reissued_at":"2026-07-07T02:19:04.154047Z","signature_status":"signed_v1","first_computed_at":"2026-07-07T02:19:04.154047Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Genuine Multipartite Entanglement between Logical Qubits via Cross-Code Lattice Surgery","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alex Steiner, Christian D. Marciniak, Hendrik Poulsen Nautrup, Ivan Pogorelov, Marcel Meyer, Nicolai Friis, Phila Rembold, Philipp Schindler, Robert Freund, Thomas Monz, Tomasz Andrzejewski","submitted_at":"2026-07-05T11:01:11Z","abstract_excerpt":"Universal quantum computers are expected to generate arbitrary complex quantum states of logical qubits encoded in many physical qubits. This capability hinges on a fault-tolerantly implemented universal gate set, which no single quantum error-correction code admits transversally but which becomes accessible by joining complementary codes via lattice surgery. Here we report on the experimental generation and certification of logical genuine multipartite entanglement in a trapped-ion quantum processor using a transversally implemented universal logical gate set. The gate set is accessed via lat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.04227","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2607.04227/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2607.04227","created_at":"2026-07-07T02:19:04.154155+00:00"},{"alias_kind":"arxiv_version","alias_value":"2607.04227v1","created_at":"2026-07-07T02:19:04.154155+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.04227","created_at":"2026-07-07T02:19:04.154155+00:00"},{"alias_kind":"pith_short_12","alias_value":"E4WOBEH5UHV7","created_at":"2026-07-07T02:19:04.154155+00:00"},{"alias_kind":"pith_short_16","alias_value":"E4WOBEH5UHV7WES4","created_at":"2026-07-07T02:19:04.154155+00:00"},{"alias_kind":"pith_short_8","alias_value":"E4WOBEH5","created_at":"2026-07-07T02:19:04.154155+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/E4WOBEH5UHV7WES4CMHFPC3EXA","json":"https://pith.science/pith/E4WOBEH5UHV7WES4CMHFPC3EXA.json","graph_json":"https://pith.science/api/pith-number/E4WOBEH5UHV7WES4CMHFPC3EXA/graph.json","events_json":"https://pith.science/api/pith-number/E4WOBEH5UHV7WES4CMHFPC3EXA/events.json","paper":"https://pith.science/paper/E4WOBEH5"},"agent_actions":{"view_html":"https://pith.science/pith/E4WOBEH5UHV7WES4CMHFPC3EXA","download_json":"https://pith.science/pith/E4WOBEH5UHV7WES4CMHFPC3EXA.json","view_paper":"https://pith.science/paper/E4WOBEH5","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2607.04227&json=true","fetch_graph":"https://pith.science/api/pith-number/E4WOBEH5UHV7WES4CMHFPC3EXA/graph.json","fetch_events":"https://pith.science/api/pith-number/E4WOBEH5UHV7WES4CMHFPC3EXA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/E4WOBEH5UHV7WES4CMHFPC3EXA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/E4WOBEH5UHV7WES4CMHFPC3EXA/action/storage_attestation","attest_author":"https://pith.science/pith/E4WOBEH5UHV7WES4CMHFPC3EXA/action/author_attestation","sign_citation":"https://pith.science/pith/E4WOBEH5UHV7WES4CMHFPC3EXA/action/citation_signature","submit_replication":"https://pith.science/pith/E4WOBEH5UHV7WES4CMHFPC3EXA/action/replication_record"}},"created_at":"2026-07-07T02:19:04.154155+00:00","updated_at":"2026-07-07T02:19:04.154155+00:00"}