{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:KIK6RLS6J56BKNHQACSA4HTNUE","short_pith_number":"pith:KIK6RLS6","schema_version":"1.0","canonical_sha256":"5215e8ae5e4f7c1534f000a40e1e6da137e618d304090b000a7617455b68c80b","source":{"kind":"arxiv","id":"2109.04736","version":1},"attestation_state":"computed","paper":{"title":"Implementation of a 46-node quantum metropolitan area network","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Cheng-Zhi Peng, Hao Liang, Hong-Fei Zhang, Hongyi Zhou, Jian Wang, Jian-Wei Pan, Ke Cui, Lei Zhou, Li Li, Liu-Jun Wang, Luo-Kan Chen, Nai-Le Liu, Qiang Zhang, Qing Chen, Shi-Biao Tang, Si-Bo Feng, Teng-Yun Chen, Wei-Yue Liu, Xiao-Gang Li, Xiao Jiang, Xiao Yuan, Xiongfeng Ma, Yang Liu, Yingqiu Mao, Yong Zhao","submitted_at":"2021-09-10T08:32:58Z","abstract_excerpt":"Quantum key distribution (QKD) enables secure key exchanges between two remote users. The ultimate goal of secure communication is to establish a global quantum network. The existing field tests suggest that quantum networks are feasible. To achieve a practical quantum network, we need to overcome several challenges, including realising versatile topologies for large scales, simple network maintenance, extendable configuration, and robustness to node failures. To this end, we present a field operation of a quantum metropolitan-area network with 46 nodes and show that all these challenges can b"},"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":"2109.04736","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-09-10T08:32:58Z","cross_cats_sorted":[],"title_canon_sha256":"81976762f7d10b8df0c7905fff753ff13e3de493352e05d1131e9169c277e0c0","abstract_canon_sha256":"7df619b5ac56653a7610c3bb9f4b05e27049f9a656e05d077bfdadca33fec324"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:13:09.645441Z","signature_b64":"+2fim/H+uBfdHGMRGf/gTc4UwQQepuK8oAv5iA7qNAMH6HL/FkIChQN2X41kkM9lqJJ6hfGXE04V2si45gfkCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5215e8ae5e4f7c1534f000a40e1e6da137e618d304090b000a7617455b68c80b","last_reissued_at":"2026-07-05T03:13:09.645020Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:13:09.645020Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Implementation of a 46-node quantum metropolitan area network","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Cheng-Zhi Peng, Hao Liang, Hong-Fei Zhang, Hongyi Zhou, Jian Wang, Jian-Wei Pan, Ke Cui, Lei Zhou, Li Li, Liu-Jun Wang, Luo-Kan Chen, Nai-Le Liu, Qiang Zhang, Qing Chen, Shi-Biao Tang, Si-Bo Feng, Teng-Yun Chen, Wei-Yue Liu, Xiao-Gang Li, Xiao Jiang, Xiao Yuan, Xiongfeng Ma, Yang Liu, Yingqiu Mao, Yong Zhao","submitted_at":"2021-09-10T08:32:58Z","abstract_excerpt":"Quantum key distribution (QKD) enables secure key exchanges between two remote users. The ultimate goal of secure communication is to establish a global quantum network. The existing field tests suggest that quantum networks are feasible. To achieve a practical quantum network, we need to overcome several challenges, including realising versatile topologies for large scales, simple network maintenance, extendable configuration, and robustness to node failures. To this end, we present a field operation of a quantum metropolitan-area network with 46 nodes and show that all these challenges can b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.04736","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/2109.04736/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":"2109.04736","created_at":"2026-07-05T03:13:09.645077+00:00"},{"alias_kind":"arxiv_version","alias_value":"2109.04736v1","created_at":"2026-07-05T03:13:09.645077+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.04736","created_at":"2026-07-05T03:13:09.645077+00:00"},{"alias_kind":"pith_short_12","alias_value":"KIK6RLS6J56B","created_at":"2026-07-05T03:13:09.645077+00:00"},{"alias_kind":"pith_short_16","alias_value":"KIK6RLS6J56BKNHQ","created_at":"2026-07-05T03:13:09.645077+00:00"},{"alias_kind":"pith_short_8","alias_value":"KIK6RLS6","created_at":"2026-07-05T03:13:09.645077+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/KIK6RLS6J56BKNHQACSA4HTNUE","json":"https://pith.science/pith/KIK6RLS6J56BKNHQACSA4HTNUE.json","graph_json":"https://pith.science/api/pith-number/KIK6RLS6J56BKNHQACSA4HTNUE/graph.json","events_json":"https://pith.science/api/pith-number/KIK6RLS6J56BKNHQACSA4HTNUE/events.json","paper":"https://pith.science/paper/KIK6RLS6"},"agent_actions":{"view_html":"https://pith.science/pith/KIK6RLS6J56BKNHQACSA4HTNUE","download_json":"https://pith.science/pith/KIK6RLS6J56BKNHQACSA4HTNUE.json","view_paper":"https://pith.science/paper/KIK6RLS6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2109.04736&json=true","fetch_graph":"https://pith.science/api/pith-number/KIK6RLS6J56BKNHQACSA4HTNUE/graph.json","fetch_events":"https://pith.science/api/pith-number/KIK6RLS6J56BKNHQACSA4HTNUE/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KIK6RLS6J56BKNHQACSA4HTNUE/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KIK6RLS6J56BKNHQACSA4HTNUE/action/storage_attestation","attest_author":"https://pith.science/pith/KIK6RLS6J56BKNHQACSA4HTNUE/action/author_attestation","sign_citation":"https://pith.science/pith/KIK6RLS6J56BKNHQACSA4HTNUE/action/citation_signature","submit_replication":"https://pith.science/pith/KIK6RLS6J56BKNHQACSA4HTNUE/action/replication_record"}},"created_at":"2026-07-05T03:13:09.645077+00:00","updated_at":"2026-07-05T03:13:09.645077+00:00"}