{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:7Q3WB5VUQWBMIJNSQ46JYZRFFZ","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":"dfa03957717ca0cce95939eee0e11b8e8e07649e86941c3561d71144ce1c106c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-04-26T05:30:53Z","title_canon_sha256":"20c2d436b5959337e059c01c8acf8dd477a5bcec88511686f5431f94c1aa94c0"},"schema_version":"1.0","source":{"id":"1204.5832","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.5832","created_at":"2026-05-18T01:57:44Z"},{"alias_kind":"arxiv_version","alias_value":"1204.5832v1","created_at":"2026-05-18T01:57:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.5832","created_at":"2026-05-18T01:57:44Z"},{"alias_kind":"pith_short_12","alias_value":"7Q3WB5VUQWBM","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"7Q3WB5VUQWBMIJNS","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"7Q3WB5VU","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:8fa36415bf0e56503f7e425719dfb991affd9a2fa9bf3a38a6cef8b8b1a85d06","target":"graph","created_at":"2026-05-18T01:57:44Z","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 a new quantum network scheme using orbital angular momentum states of photons to route the network and spin angular momentum states to encode the information. A four-user experimental scheme based on this efficient quantum network is analyzed in detail, which is particularly appealing for the free space quantum key distribution. Users can freely exchange quantum keys with each other.","authors_text":"Fa-Qiang Wang, Rui-Bo Jin, Rui-Sheng Liang, Song-Hao Liu, Zhi-Kun Su","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-04-26T05:30:53Z","title":"A simple scheme for quantum networks based on orbital angular momentum states of photons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.5832","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:bf20699097b8b33f6c2600decb3065aee5ba2d74cd55a69f00b57e562105cb7d","target":"record","created_at":"2026-05-18T01:57:44Z","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":"dfa03957717ca0cce95939eee0e11b8e8e07649e86941c3561d71144ce1c106c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-04-26T05:30:53Z","title_canon_sha256":"20c2d436b5959337e059c01c8acf8dd477a5bcec88511686f5431f94c1aa94c0"},"schema_version":"1.0","source":{"id":"1204.5832","kind":"arxiv","version":1}},"canonical_sha256":"fc3760f6b48582c425b2873c9c66252e798fba81da79044edd39d0e92fe38ec2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc3760f6b48582c425b2873c9c66252e798fba81da79044edd39d0e92fe38ec2","first_computed_at":"2026-05-18T01:57:44.025292Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:44.025292Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4c7uEniAlGCB4VUZ9msKV+ZoUGHY9ZttEnP4J6FtJBArPQxh/i+GQqvf56+Q5Xyb17p9CiJ7yIW5SLzEBXvZBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:44.025932Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.5832","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf20699097b8b33f6c2600decb3065aee5ba2d74cd55a69f00b57e562105cb7d","sha256:8fa36415bf0e56503f7e425719dfb991affd9a2fa9bf3a38a6cef8b8b1a85d06"],"state_sha256":"ef876bea94ff525c1ec72c6c12a55f7b67b4f46864d9fe6907405355c3264981"}