{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:USU4AERIVF6VKTIOAC44U2ZUZH","short_pith_number":"pith:USU4AERI","schema_version":"1.0","canonical_sha256":"a4a9c01228a97d554d0e00b9ca6b34c9f9f05d3ca2df5e122f315c0e199a8d76","source":{"kind":"arxiv","id":"1012.5584","version":2},"attestation_state":"computed","paper":{"title":"Efficient decoherence-free entanglement distribution over lossy quantum channels","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Masato Koashi, Nobuyuki Imoto, Rikizo Ikuta, Takashi Yamamoto, Toshiyuki Tashima, Yohei Ono","submitted_at":"2010-12-27T09:54:50Z","abstract_excerpt":"We propose and demonstrate a scheme for boosting up the efficiency of entanglement distribution based on a decoherence-free subspace (DFS) over lossy quantum channels. By using backward propagation of a coherent light, our scheme achieves an entanglement-sharing rate that is proportional to the transmittance T of the quantum channel in spite of encoding qubits in multipartite systems for the DFS. We experimentally show that highly entangled states, which can violate the Clauser-Horne-Shimony-Holt inequality, are distributed at a rate proportional to T."},"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":"1012.5584","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-12-27T09:54:50Z","cross_cats_sorted":[],"title_canon_sha256":"3f1073f6bbc902c935e89d2fe0d34563e6d51fc79befb1a14c5d342f187e2516","abstract_canon_sha256":"12a31d8f1fce2284966d288b5629b1a337d8e3545a8c085892448ed1afea964b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:20:22.077869Z","signature_b64":"afV1ANplmDvd5FJiFd4Kl5hcBCwnM8SDLP9RGSuqm6M9tuvVtrZy+4GitiSxs5ZyOYEUjRFu+GOWMlMDePG2Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a4a9c01228a97d554d0e00b9ca6b34c9f9f05d3ca2df5e122f315c0e199a8d76","last_reissued_at":"2026-05-18T04:20:22.077393Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:20:22.077393Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Efficient decoherence-free entanglement distribution over lossy quantum channels","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Masato Koashi, Nobuyuki Imoto, Rikizo Ikuta, Takashi Yamamoto, Toshiyuki Tashima, Yohei Ono","submitted_at":"2010-12-27T09:54:50Z","abstract_excerpt":"We propose and demonstrate a scheme for boosting up the efficiency of entanglement distribution based on a decoherence-free subspace (DFS) over lossy quantum channels. By using backward propagation of a coherent light, our scheme achieves an entanglement-sharing rate that is proportional to the transmittance T of the quantum channel in spite of encoding qubits in multipartite systems for the DFS. We experimentally show that highly entangled states, which can violate the Clauser-Horne-Shimony-Holt inequality, are distributed at a rate proportional to T."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.5584","kind":"arxiv","version":2},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1012.5584","created_at":"2026-05-18T04:20:22.077470+00:00"},{"alias_kind":"arxiv_version","alias_value":"1012.5584v2","created_at":"2026-05-18T04:20:22.077470+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.5584","created_at":"2026-05-18T04:20:22.077470+00:00"},{"alias_kind":"pith_short_12","alias_value":"USU4AERIVF6V","created_at":"2026-05-18T12:26:15.391820+00:00"},{"alias_kind":"pith_short_16","alias_value":"USU4AERIVF6VKTIO","created_at":"2026-05-18T12:26:15.391820+00:00"},{"alias_kind":"pith_short_8","alias_value":"USU4AERI","created_at":"2026-05-18T12:26:15.391820+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/USU4AERIVF6VKTIOAC44U2ZUZH","json":"https://pith.science/pith/USU4AERIVF6VKTIOAC44U2ZUZH.json","graph_json":"https://pith.science/api/pith-number/USU4AERIVF6VKTIOAC44U2ZUZH/graph.json","events_json":"https://pith.science/api/pith-number/USU4AERIVF6VKTIOAC44U2ZUZH/events.json","paper":"https://pith.science/paper/USU4AERI"},"agent_actions":{"view_html":"https://pith.science/pith/USU4AERIVF6VKTIOAC44U2ZUZH","download_json":"https://pith.science/pith/USU4AERIVF6VKTIOAC44U2ZUZH.json","view_paper":"https://pith.science/paper/USU4AERI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1012.5584&json=true","fetch_graph":"https://pith.science/api/pith-number/USU4AERIVF6VKTIOAC44U2ZUZH/graph.json","fetch_events":"https://pith.science/api/pith-number/USU4AERIVF6VKTIOAC44U2ZUZH/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/USU4AERIVF6VKTIOAC44U2ZUZH/action/timestamp_anchor","attest_storage":"https://pith.science/pith/USU4AERIVF6VKTIOAC44U2ZUZH/action/storage_attestation","attest_author":"https://pith.science/pith/USU4AERIVF6VKTIOAC44U2ZUZH/action/author_attestation","sign_citation":"https://pith.science/pith/USU4AERIVF6VKTIOAC44U2ZUZH/action/citation_signature","submit_replication":"https://pith.science/pith/USU4AERIVF6VKTIOAC44U2ZUZH/action/replication_record"}},"created_at":"2026-05-18T04:20:22.077470+00:00","updated_at":"2026-05-18T04:20:22.077470+00:00"}