{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:YUHSIPWY7C2XPOCNWNJWMATN6P","short_pith_number":"pith:YUHSIPWY","canonical_record":{"source":{"id":"quant-ph/0612045","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2006-12-06T16:21:04Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"62e43891ca3a8449341ab35a69fa47903c650f59b2b01c95e39f1a6253a65378","abstract_canon_sha256":"1880e718030b016c2f047a9805cecc0a5fe90f4102461b50501979c67b75927f"},"schema_version":"1.0"},"canonical_sha256":"c50f243ed8f8b577b84db35366026df3e27d92245c895db2eb6de34e676ee6e6","source":{"kind":"arxiv","id":"quant-ph/0612045","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0612045","created_at":"2026-05-18T01:37:53Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0612045v1","created_at":"2026-05-18T01:37:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0612045","created_at":"2026-05-18T01:37:53Z"},{"alias_kind":"pith_short_12","alias_value":"YUHSIPWY7C2X","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"YUHSIPWY7C2XPOCN","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"YUHSIPWY","created_at":"2026-05-18T12:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:YUHSIPWY7C2XPOCNWNJWMATN6P","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/0612045","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2006-12-06T16:21:04Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"62e43891ca3a8449341ab35a69fa47903c650f59b2b01c95e39f1a6253a65378","abstract_canon_sha256":"1880e718030b016c2f047a9805cecc0a5fe90f4102461b50501979c67b75927f"},"schema_version":"1.0"},"canonical_sha256":"c50f243ed8f8b577b84db35366026df3e27d92245c895db2eb6de34e676ee6e6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:53.751076Z","signature_b64":"mKiwwZ9f+W6H3692gGy7j+9SkyWuwQtph4lqnrrV/DZjNvWO2rUXPZdh0NUffRjkUBmy9TbfEKKriM+cwg6tDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c50f243ed8f8b577b84db35366026df3e27d92245c895db2eb6de34e676ee6e6","last_reissued_at":"2026-05-18T01:37:53.750415Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:53.750415Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/0612045","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":"2026-05-18T01:37:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EVCmMthW05T5v/4HFNgJPvNPOaAO/tJuYTdzj+5AXeSn+Pb5chzWw6+mwKsL8+PHQkfzCzlMtlwKdotWwngKCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:51:39.003298Z"},"content_sha256":"10ebd75e47b2423bce5f50f319eb52be0a620d553602b8a714ff07a56196d062","schema_version":"1.0","event_id":"sha256:10ebd75e47b2423bce5f50f319eb52be0a620d553602b8a714ff07a56196d062"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:YUHSIPWY7C2XPOCNWNJWMATN6P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Accumulation of entanglement in a continuous variable memory","license":"","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"quant-ph","authors_text":"G. M. Palma, M. Paternostro, M. S. Kim","submitted_at":"2006-12-06T16:21:04Z","abstract_excerpt":"We study the accumulation of entanglement in a memory device built out of two continuous variable (CV) systems. We address the case of a qubit mediating an indirect joint interaction between the CV systems. We show that, in striking contrast with respect to registers built out of bidimensional Hilbert spaces, entanglement superior to a single ebit can be efficiently accumulated in the memory, even though no entangled resource is used. We study the protocol in an immediately implementable setup, assessing the effects of the main imperfections."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0612045","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":"2026-05-18T01:37:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"//OL0IFDNoNv3JyzoXlAf6tC1GhBw6d6KzQo6hTr0rG0YGIYyE1WtkKPgwsRZT0ZT4rjcs+78x34TUc8zaA5DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:51:39.003965Z"},"content_sha256":"44cedfcbc89cdf28d05090658648fc1686dc4122ea539dcf3ba3f49ecd87f656","schema_version":"1.0","event_id":"sha256:44cedfcbc89cdf28d05090658648fc1686dc4122ea539dcf3ba3f49ecd87f656"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YUHSIPWY7C2XPOCNWNJWMATN6P/bundle.json","state_url":"https://pith.science/pith/YUHSIPWY7C2XPOCNWNJWMATN6P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YUHSIPWY7C2XPOCNWNJWMATN6P/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":"2026-05-27T21:51:39Z","links":{"resolver":"https://pith.science/pith/YUHSIPWY7C2XPOCNWNJWMATN6P","bundle":"https://pith.science/pith/YUHSIPWY7C2XPOCNWNJWMATN6P/bundle.json","state":"https://pith.science/pith/YUHSIPWY7C2XPOCNWNJWMATN6P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YUHSIPWY7C2XPOCNWNJWMATN6P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:YUHSIPWY7C2XPOCNWNJWMATN6P","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":"1880e718030b016c2f047a9805cecc0a5fe90f4102461b50501979c67b75927f","cross_cats_sorted":["cond-mat.other"],"license":"","primary_cat":"quant-ph","submitted_at":"2006-12-06T16:21:04Z","title_canon_sha256":"62e43891ca3a8449341ab35a69fa47903c650f59b2b01c95e39f1a6253a65378"},"schema_version":"1.0","source":{"id":"quant-ph/0612045","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0612045","created_at":"2026-05-18T01:37:53Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0612045v1","created_at":"2026-05-18T01:37:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0612045","created_at":"2026-05-18T01:37:53Z"},{"alias_kind":"pith_short_12","alias_value":"YUHSIPWY7C2X","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"YUHSIPWY7C2XPOCN","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"YUHSIPWY","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:44cedfcbc89cdf28d05090658648fc1686dc4122ea539dcf3ba3f49ecd87f656","target":"graph","created_at":"2026-05-18T01:37:53Z","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 study the accumulation of entanglement in a memory device built out of two continuous variable (CV) systems. We address the case of a qubit mediating an indirect joint interaction between the CV systems. We show that, in striking contrast with respect to registers built out of bidimensional Hilbert spaces, entanglement superior to a single ebit can be efficiently accumulated in the memory, even though no entangled resource is used. We study the protocol in an immediately implementable setup, assessing the effects of the main imperfections.","authors_text":"G. M. Palma, M. Paternostro, M. S. Kim","cross_cats":["cond-mat.other"],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"2006-12-06T16:21:04Z","title":"Accumulation of entanglement in a continuous variable memory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0612045","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":"sha256:10ebd75e47b2423bce5f50f319eb52be0a620d553602b8a714ff07a56196d062","target":"record","created_at":"2026-05-18T01:37:53Z","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":"1880e718030b016c2f047a9805cecc0a5fe90f4102461b50501979c67b75927f","cross_cats_sorted":["cond-mat.other"],"license":"","primary_cat":"quant-ph","submitted_at":"2006-12-06T16:21:04Z","title_canon_sha256":"62e43891ca3a8449341ab35a69fa47903c650f59b2b01c95e39f1a6253a65378"},"schema_version":"1.0","source":{"id":"quant-ph/0612045","kind":"arxiv","version":1}},"canonical_sha256":"c50f243ed8f8b577b84db35366026df3e27d92245c895db2eb6de34e676ee6e6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c50f243ed8f8b577b84db35366026df3e27d92245c895db2eb6de34e676ee6e6","first_computed_at":"2026-05-18T01:37:53.750415Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:53.750415Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mKiwwZ9f+W6H3692gGy7j+9SkyWuwQtph4lqnrrV/DZjNvWO2rUXPZdh0NUffRjkUBmy9TbfEKKriM+cwg6tDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:53.751076Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/0612045","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:10ebd75e47b2423bce5f50f319eb52be0a620d553602b8a714ff07a56196d062","sha256:44cedfcbc89cdf28d05090658648fc1686dc4122ea539dcf3ba3f49ecd87f656"],"state_sha256":"8481974a20cf041d4a08bb49f2e85d1e1ff0a1bb1b1d2e79daa5f0521fd9157d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mdadU3cZ1Nu4GICLpWnu1n8P/JiVvwDKndFeTk/KhBRjGSoTKWE/zaY0tCEhOf+zl0p4wlgQGA+MPP9En1fcCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T21:51:39.007266Z","bundle_sha256":"f67ab00f931bc110fe305542c398186afb3e035926221b905e53476b82df4991"}}