{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:FEUFXOEHH5WTFQRPPDIPN4M4F7","short_pith_number":"pith:FEUFXOEH","canonical_record":{"source":{"id":"1704.07765","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-04-25T16:16:42Z","cross_cats_sorted":[],"title_canon_sha256":"1898e5e08905711cfd7475c67c622394b42545f14c5d8915eaf3b86c88521f96","abstract_canon_sha256":"bd1fd8620200b7b5cab716382309f0318a6dfc7fcf90fc6260e3f0fc2168693e"},"schema_version":"1.0"},"canonical_sha256":"29285bb8873f6d32c22f78d0f6f19c2fdc474cd856eb3f64aa9215b25d4769a6","source":{"kind":"arxiv","id":"1704.07765","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.07765","created_at":"2026-05-18T00:37:33Z"},{"alias_kind":"arxiv_version","alias_value":"1704.07765v1","created_at":"2026-05-18T00:37:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.07765","created_at":"2026-05-18T00:37:33Z"},{"alias_kind":"pith_short_12","alias_value":"FEUFXOEHH5WT","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_16","alias_value":"FEUFXOEHH5WTFQRP","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_8","alias_value":"FEUFXOEH","created_at":"2026-05-18T12:31:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:FEUFXOEHH5WTFQRPPDIPN4M4F7","target":"record","payload":{"canonical_record":{"source":{"id":"1704.07765","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-04-25T16:16:42Z","cross_cats_sorted":[],"title_canon_sha256":"1898e5e08905711cfd7475c67c622394b42545f14c5d8915eaf3b86c88521f96","abstract_canon_sha256":"bd1fd8620200b7b5cab716382309f0318a6dfc7fcf90fc6260e3f0fc2168693e"},"schema_version":"1.0"},"canonical_sha256":"29285bb8873f6d32c22f78d0f6f19c2fdc474cd856eb3f64aa9215b25d4769a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:37:33.892753Z","signature_b64":"QZ0h7vuNgfoDc+IKlDOqXAWxAPWToa2CcLwfxfMJOFDpvqUS3dkvUnikqU9M5UpbSZP+GDVaUR4BqHTfWyTPBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"29285bb8873f6d32c22f78d0f6f19c2fdc474cd856eb3f64aa9215b25d4769a6","last_reissued_at":"2026-05-18T00:37:33.892310Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:37:33.892310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.07765","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":"2026-05-18T00:37:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7uiy80ydF+bNxF+SLI7KQaM/L66ZtzVzv2c/kfRWSgTtmhvflEcyySJgYe2GqEgzC0mQUT05TspJvILOmkyYAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T11:37:35.785567Z"},"content_sha256":"77e5f7323a30b887d340c069fda1d7d25927402b857ccfc4b94c6cdcb2eee153","schema_version":"1.0","event_id":"sha256:77e5f7323a30b887d340c069fda1d7d25927402b857ccfc4b94c6cdcb2eee153"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:FEUFXOEHH5WTFQRPPDIPN4M4F7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum-dot based telecom-wavelength quantum relay","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"A. J. Shields, D. A. Ritchie, I. Farrer, J. Huwer, J. Skiba-Szymanska, M. B. Ward, M. Felle, R. M. Stevenson, R. V. Penty","submitted_at":"2017-04-25T16:16:42Z","abstract_excerpt":"The development of quantum relays for long haul and attack-proof quantum communication networks operating with weak coherent laser pulses requires entangled photon sources at telecommunication wavelengths with intrinsic single-photon emission for most practical implementations. Using a semiconductor quantum dot emitting entangled photon pairs in the telecom O-band, we demonstrate for the first time a quantum relay fulfilling both of these conditions. The system achieves a maximum fidelity of 94.5 % for implementation of a standard 4-state protocol with input states generated by a laser. We fur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.07765","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":"2026-05-18T00:37:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OY7g+DbfmJeWjSTnPKkW/5+vLVBtB+hYbbOktFOz4OKttLAZyQgwyxX8fEDBrBzMo/goS70vjyXmbE2o7cHxBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T11:37:35.785917Z"},"content_sha256":"653599983eb2639447f056936d918c625fc06562bce72fcd5fa3d951744df456","schema_version":"1.0","event_id":"sha256:653599983eb2639447f056936d918c625fc06562bce72fcd5fa3d951744df456"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FEUFXOEHH5WTFQRPPDIPN4M4F7/bundle.json","state_url":"https://pith.science/pith/FEUFXOEHH5WTFQRPPDIPN4M4F7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FEUFXOEHH5WTFQRPPDIPN4M4F7/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":"2026-05-19T11:37:35Z","links":{"resolver":"https://pith.science/pith/FEUFXOEHH5WTFQRPPDIPN4M4F7","bundle":"https://pith.science/pith/FEUFXOEHH5WTFQRPPDIPN4M4F7/bundle.json","state":"https://pith.science/pith/FEUFXOEHH5WTFQRPPDIPN4M4F7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FEUFXOEHH5WTFQRPPDIPN4M4F7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:FEUFXOEHH5WTFQRPPDIPN4M4F7","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":"bd1fd8620200b7b5cab716382309f0318a6dfc7fcf90fc6260e3f0fc2168693e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-04-25T16:16:42Z","title_canon_sha256":"1898e5e08905711cfd7475c67c622394b42545f14c5d8915eaf3b86c88521f96"},"schema_version":"1.0","source":{"id":"1704.07765","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.07765","created_at":"2026-05-18T00:37:33Z"},{"alias_kind":"arxiv_version","alias_value":"1704.07765v1","created_at":"2026-05-18T00:37:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.07765","created_at":"2026-05-18T00:37:33Z"},{"alias_kind":"pith_short_12","alias_value":"FEUFXOEHH5WT","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_16","alias_value":"FEUFXOEHH5WTFQRP","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_8","alias_value":"FEUFXOEH","created_at":"2026-05-18T12:31:15Z"}],"graph_snapshots":[{"event_id":"sha256:653599983eb2639447f056936d918c625fc06562bce72fcd5fa3d951744df456","target":"graph","created_at":"2026-05-18T00:37:33Z","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":"The development of quantum relays for long haul and attack-proof quantum communication networks operating with weak coherent laser pulses requires entangled photon sources at telecommunication wavelengths with intrinsic single-photon emission for most practical implementations. Using a semiconductor quantum dot emitting entangled photon pairs in the telecom O-band, we demonstrate for the first time a quantum relay fulfilling both of these conditions. The system achieves a maximum fidelity of 94.5 % for implementation of a standard 4-state protocol with input states generated by a laser. We fur","authors_text":"A. J. Shields, D. A. Ritchie, I. Farrer, J. Huwer, J. Skiba-Szymanska, M. B. Ward, M. Felle, R. M. Stevenson, R. V. Penty","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-04-25T16:16:42Z","title":"Quantum-dot based telecom-wavelength quantum relay"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.07765","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":"sha256:77e5f7323a30b887d340c069fda1d7d25927402b857ccfc4b94c6cdcb2eee153","target":"record","created_at":"2026-05-18T00:37:33Z","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":"bd1fd8620200b7b5cab716382309f0318a6dfc7fcf90fc6260e3f0fc2168693e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-04-25T16:16:42Z","title_canon_sha256":"1898e5e08905711cfd7475c67c622394b42545f14c5d8915eaf3b86c88521f96"},"schema_version":"1.0","source":{"id":"1704.07765","kind":"arxiv","version":1}},"canonical_sha256":"29285bb8873f6d32c22f78d0f6f19c2fdc474cd856eb3f64aa9215b25d4769a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"29285bb8873f6d32c22f78d0f6f19c2fdc474cd856eb3f64aa9215b25d4769a6","first_computed_at":"2026-05-18T00:37:33.892310Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:37:33.892310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QZ0h7vuNgfoDc+IKlDOqXAWxAPWToa2CcLwfxfMJOFDpvqUS3dkvUnikqU9M5UpbSZP+GDVaUR4BqHTfWyTPBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:37:33.892753Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.07765","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:77e5f7323a30b887d340c069fda1d7d25927402b857ccfc4b94c6cdcb2eee153","sha256:653599983eb2639447f056936d918c625fc06562bce72fcd5fa3d951744df456"],"state_sha256":"3dbe654f331d2263b9a9c15ad7f7579c15589a13559e1892c54addefbdf7d734"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pKY8Z0NPGN3n8QBUxypqqc76XlS2UsZRgkrXHRKRV/0+LhNny7L5zChvxNLHzaxNuMblZc8ALz1ZGayt2lXFBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T11:37:35.787556Z","bundle_sha256":"6e8be695b803be771c8e4d5a8f8446c814fa581fe962556d608dbb9efe6bcfac"}}