{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:HH4S6CWMZBKBH2PBKRQFPJ2OT7","short_pith_number":"pith:HH4S6CWM","canonical_record":{"source":{"id":"1205.3696","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-05-16T14:58:44Z","cross_cats_sorted":[],"title_canon_sha256":"5d3f5e60b7a7f0b46992877cb91fa9b0ceb20e95cbf75c7c67a28b5ec9957d9e","abstract_canon_sha256":"f53a57d4ddfb289797c816504154bd9fa0daa3ae299f2c33af5aead68b822199"},"schema_version":"1.0"},"canonical_sha256":"39f92f0accc85413e9e1546057a74e9fc799b5cac0ec86559f47f8bb4fc1e50c","source":{"kind":"arxiv","id":"1205.3696","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.3696","created_at":"2026-05-18T03:21:10Z"},{"alias_kind":"arxiv_version","alias_value":"1205.3696v3","created_at":"2026-05-18T03:21:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.3696","created_at":"2026-05-18T03:21:10Z"},{"alias_kind":"pith_short_12","alias_value":"HH4S6CWMZBKB","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"HH4S6CWMZBKBH2PB","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"HH4S6CWM","created_at":"2026-05-18T12:27:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:HH4S6CWMZBKBH2PBKRQFPJ2OT7","target":"record","payload":{"canonical_record":{"source":{"id":"1205.3696","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-05-16T14:58:44Z","cross_cats_sorted":[],"title_canon_sha256":"5d3f5e60b7a7f0b46992877cb91fa9b0ceb20e95cbf75c7c67a28b5ec9957d9e","abstract_canon_sha256":"f53a57d4ddfb289797c816504154bd9fa0daa3ae299f2c33af5aead68b822199"},"schema_version":"1.0"},"canonical_sha256":"39f92f0accc85413e9e1546057a74e9fc799b5cac0ec86559f47f8bb4fc1e50c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:21:10.665194Z","signature_b64":"3AMB7WdN1egI2Bx1XmGXxgm6q6U7CQC9ljr0DVH3riEsF36lguX5D3IiaW9HT3i6OQv6BTS4vu4QLdd4M/TVAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"39f92f0accc85413e9e1546057a74e9fc799b5cac0ec86559f47f8bb4fc1e50c","last_reissued_at":"2026-05-18T03:21:10.664535Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:21:10.664535Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1205.3696","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:21:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c74S//F8rnEw0X1C/dfbglJtw1lYrO3okXLNqYR+GqTmXr7NGgQwWQiCNaAB/CSvdTHtURYlOpHDhMIIT3ygDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:16:55.884736Z"},"content_sha256":"49cf3d8844d84dd9ad9958f723071bc5130800fee390e3edd9dc6f2d98302424","schema_version":"1.0","event_id":"sha256:49cf3d8844d84dd9ad9958f723071bc5130800fee390e3edd9dc6f2d98302424"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:HH4S6CWMZBKBH2PBKRQFPJ2OT7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hybrid Quantum Repeater Protocol With Fast Local Processing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"A. S. S{\\o}rensen, J. B. Brask, J. Borregaard","submitted_at":"2012-05-16T14:58:44Z","abstract_excerpt":"We propose a hybrid quantum repeater protocol combining the advantages of continuous and discrete variables. The repeater is based on the previous work of Brask et al. [Phys. Rev. Lett. 105, 160501 (2010)] but we present two ways of improving this protocol. In the previous protocol entangled single-photon states are produced and grown into superpositions of coherent states, known as two-mode cat states. The entanglement is then distributed using homodyne detection. To improve the protocol, we replace the time-consuming non-local growth of cat states with local growth of single-mode cat states,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.3696","kind":"arxiv","version":3},"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":"2026-05-18T03:21:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dK3HCYP/ZCfMggvcykMteN81jaY6u8U8ff9vpyGc5DfE3xKf/8u0is2qhQbgDhw2x+KnVEmYHGvtp20xy+O9DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:16:55.885085Z"},"content_sha256":"6c43ab25ecd5a16326ef47a814dd9b99478ed592d2663157d874a5b6605c930b","schema_version":"1.0","event_id":"sha256:6c43ab25ecd5a16326ef47a814dd9b99478ed592d2663157d874a5b6605c930b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HH4S6CWMZBKBH2PBKRQFPJ2OT7/bundle.json","state_url":"https://pith.science/pith/HH4S6CWMZBKBH2PBKRQFPJ2OT7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HH4S6CWMZBKBH2PBKRQFPJ2OT7/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":"2026-05-28T08:16:55Z","links":{"resolver":"https://pith.science/pith/HH4S6CWMZBKBH2PBKRQFPJ2OT7","bundle":"https://pith.science/pith/HH4S6CWMZBKBH2PBKRQFPJ2OT7/bundle.json","state":"https://pith.science/pith/HH4S6CWMZBKBH2PBKRQFPJ2OT7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HH4S6CWMZBKBH2PBKRQFPJ2OT7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:HH4S6CWMZBKBH2PBKRQFPJ2OT7","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":"f53a57d4ddfb289797c816504154bd9fa0daa3ae299f2c33af5aead68b822199","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-05-16T14:58:44Z","title_canon_sha256":"5d3f5e60b7a7f0b46992877cb91fa9b0ceb20e95cbf75c7c67a28b5ec9957d9e"},"schema_version":"1.0","source":{"id":"1205.3696","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.3696","created_at":"2026-05-18T03:21:10Z"},{"alias_kind":"arxiv_version","alias_value":"1205.3696v3","created_at":"2026-05-18T03:21:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.3696","created_at":"2026-05-18T03:21:10Z"},{"alias_kind":"pith_short_12","alias_value":"HH4S6CWMZBKB","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"HH4S6CWMZBKBH2PB","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"HH4S6CWM","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:6c43ab25ecd5a16326ef47a814dd9b99478ed592d2663157d874a5b6605c930b","target":"graph","created_at":"2026-05-18T03:21:10Z","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 hybrid quantum repeater protocol combining the advantages of continuous and discrete variables. The repeater is based on the previous work of Brask et al. [Phys. Rev. Lett. 105, 160501 (2010)] but we present two ways of improving this protocol. In the previous protocol entangled single-photon states are produced and grown into superpositions of coherent states, known as two-mode cat states. The entanglement is then distributed using homodyne detection. To improve the protocol, we replace the time-consuming non-local growth of cat states with local growth of single-mode cat states,","authors_text":"A. S. S{\\o}rensen, J. B. Brask, J. Borregaard","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-05-16T14:58:44Z","title":"Hybrid Quantum Repeater Protocol With Fast Local Processing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.3696","kind":"arxiv","version":3},"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":"sha256:49cf3d8844d84dd9ad9958f723071bc5130800fee390e3edd9dc6f2d98302424","target":"record","created_at":"2026-05-18T03:21:10Z","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":"f53a57d4ddfb289797c816504154bd9fa0daa3ae299f2c33af5aead68b822199","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-05-16T14:58:44Z","title_canon_sha256":"5d3f5e60b7a7f0b46992877cb91fa9b0ceb20e95cbf75c7c67a28b5ec9957d9e"},"schema_version":"1.0","source":{"id":"1205.3696","kind":"arxiv","version":3}},"canonical_sha256":"39f92f0accc85413e9e1546057a74e9fc799b5cac0ec86559f47f8bb4fc1e50c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"39f92f0accc85413e9e1546057a74e9fc799b5cac0ec86559f47f8bb4fc1e50c","first_computed_at":"2026-05-18T03:21:10.664535Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:21:10.664535Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3AMB7WdN1egI2Bx1XmGXxgm6q6U7CQC9ljr0DVH3riEsF36lguX5D3IiaW9HT3i6OQv6BTS4vu4QLdd4M/TVAg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:21:10.665194Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.3696","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:49cf3d8844d84dd9ad9958f723071bc5130800fee390e3edd9dc6f2d98302424","sha256:6c43ab25ecd5a16326ef47a814dd9b99478ed592d2663157d874a5b6605c930b"],"state_sha256":"6472d7c5baf7f6e28290bd76d3f200a7b13f70b03bfe4403a994357cd351bad0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bfMwhxHk+Ye+PgviDkdT/nnEgwbOFqBsi+PnkWELfTM+HTO7NwskzxRNUXxH2JmPqhnpAcIFhMLSf68RBiEkAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T08:16:55.886987Z","bundle_sha256":"2c8117bbc7f4ec6642eeeada5b62957c624be3b37728bece0796324b2af80eae"}}