{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:QXWUYQLE6IROXMBKGN5C6U22SL","short_pith_number":"pith:QXWUYQLE","canonical_record":{"source":{"id":"1111.1107","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-11-04T12:13:26Z","cross_cats_sorted":[],"title_canon_sha256":"7a552cf78eef7e85e4b6b715243154e920735bae82f0566047b6eb240976c6ae","abstract_canon_sha256":"1df14f72ea7330c5abf504995ce94557c859320b775b97ae2c3db3041c2cae9d"},"schema_version":"1.0"},"canonical_sha256":"85ed4c4164f222ebb02a337a2f535a92c585660ced662cc311dbd6605616052e","source":{"kind":"arxiv","id":"1111.1107","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.1107","created_at":"2026-05-18T03:58:04Z"},{"alias_kind":"arxiv_version","alias_value":"1111.1107v1","created_at":"2026-05-18T03:58:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.1107","created_at":"2026-05-18T03:58:04Z"},{"alias_kind":"pith_short_12","alias_value":"QXWUYQLE6IRO","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QXWUYQLE6IROXMBK","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QXWUYQLE","created_at":"2026-05-18T12:26:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:QXWUYQLE6IROXMBKGN5C6U22SL","target":"record","payload":{"canonical_record":{"source":{"id":"1111.1107","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-11-04T12:13:26Z","cross_cats_sorted":[],"title_canon_sha256":"7a552cf78eef7e85e4b6b715243154e920735bae82f0566047b6eb240976c6ae","abstract_canon_sha256":"1df14f72ea7330c5abf504995ce94557c859320b775b97ae2c3db3041c2cae9d"},"schema_version":"1.0"},"canonical_sha256":"85ed4c4164f222ebb02a337a2f535a92c585660ced662cc311dbd6605616052e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:58:04.368149Z","signature_b64":"irWMN2xuzQYXJf0muZrNHVUsuc8eAgBdLAFmUyA5vKw/b/LvWjUGvgCAQo0tV/zsTUVW2mZUiAOfb3h8SDM5Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"85ed4c4164f222ebb02a337a2f535a92c585660ced662cc311dbd6605616052e","last_reissued_at":"2026-05-18T03:58:04.367677Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:58:04.367677Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1111.1107","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":"2026-05-18T03:58:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C0X1CO6NEIb0EisZwhpsyCYp1jXIInDpbatIOSyUtFx8LkjaHSJXfukxYNUznTc0/5761GsMmnQG0WLMWtEBDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T22:44:13.067375Z"},"content_sha256":"e7c641d4801fac1bfbd06c88522d46a83d4e5c3aea444dc7b0b7d1df0338e4ed","schema_version":"1.0","event_id":"sha256:e7c641d4801fac1bfbd06c88522d46a83d4e5c3aea444dc7b0b7d1df0338e4ed"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:QXWUYQLE6IROXMBKGN5C6U22SL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Beyond pure state entanglement for atomic ensembles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Anna Sanpera, Julia Stasi\\'nska, Simone Paganelli","submitted_at":"2011-11-04T12:13:26Z","abstract_excerpt":"We analyze multipartite entanglement between atomic ensembles within quantum matter-light interfaces. In our proposal, a polarized light beam crosses sequentially several polarized atomic ensembles impinging on each of them at a given angle \\alpha_i. These angles are crucial parameters for shaping the entanglement since they are directly connected to the appropriate combinations of the collective atomic spins that are squeezed. We exploit such scheme to go beyond the pure state paradigm proposing realistic experimental settings to address multipartite mixed state entanglement in continuous var"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.1107","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":"2026-05-18T03:58:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VFP/ImFzBlUCoakumzkssdBk7EdiQ/8xOaP9ggt864oupg6fj+xvpDRue5DIyFz1r0nSAbsI9+SIczDxqP4EAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T22:44:13.067724Z"},"content_sha256":"602e656fe726ecd66c1e3262b99b29e4b2690a577634228822b79e2327a6f67d","schema_version":"1.0","event_id":"sha256:602e656fe726ecd66c1e3262b99b29e4b2690a577634228822b79e2327a6f67d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QXWUYQLE6IROXMBKGN5C6U22SL/bundle.json","state_url":"https://pith.science/pith/QXWUYQLE6IROXMBKGN5C6U22SL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QXWUYQLE6IROXMBKGN5C6U22SL/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":"2026-06-10T22:44:13Z","links":{"resolver":"https://pith.science/pith/QXWUYQLE6IROXMBKGN5C6U22SL","bundle":"https://pith.science/pith/QXWUYQLE6IROXMBKGN5C6U22SL/bundle.json","state":"https://pith.science/pith/QXWUYQLE6IROXMBKGN5C6U22SL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QXWUYQLE6IROXMBKGN5C6U22SL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:QXWUYQLE6IROXMBKGN5C6U22SL","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":"1df14f72ea7330c5abf504995ce94557c859320b775b97ae2c3db3041c2cae9d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-11-04T12:13:26Z","title_canon_sha256":"7a552cf78eef7e85e4b6b715243154e920735bae82f0566047b6eb240976c6ae"},"schema_version":"1.0","source":{"id":"1111.1107","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.1107","created_at":"2026-05-18T03:58:04Z"},{"alias_kind":"arxiv_version","alias_value":"1111.1107v1","created_at":"2026-05-18T03:58:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.1107","created_at":"2026-05-18T03:58:04Z"},{"alias_kind":"pith_short_12","alias_value":"QXWUYQLE6IRO","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QXWUYQLE6IROXMBK","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QXWUYQLE","created_at":"2026-05-18T12:26:39Z"}],"graph_snapshots":[{"event_id":"sha256:602e656fe726ecd66c1e3262b99b29e4b2690a577634228822b79e2327a6f67d","target":"graph","created_at":"2026-05-18T03:58:04Z","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 analyze multipartite entanglement between atomic ensembles within quantum matter-light interfaces. In our proposal, a polarized light beam crosses sequentially several polarized atomic ensembles impinging on each of them at a given angle \\alpha_i. These angles are crucial parameters for shaping the entanglement since they are directly connected to the appropriate combinations of the collective atomic spins that are squeezed. We exploit such scheme to go beyond the pure state paradigm proposing realistic experimental settings to address multipartite mixed state entanglement in continuous var","authors_text":"Anna Sanpera, Julia Stasi\\'nska, Simone Paganelli","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-11-04T12:13:26Z","title":"Beyond pure state entanglement for atomic ensembles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.1107","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:e7c641d4801fac1bfbd06c88522d46a83d4e5c3aea444dc7b0b7d1df0338e4ed","target":"record","created_at":"2026-05-18T03:58:04Z","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":"1df14f72ea7330c5abf504995ce94557c859320b775b97ae2c3db3041c2cae9d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-11-04T12:13:26Z","title_canon_sha256":"7a552cf78eef7e85e4b6b715243154e920735bae82f0566047b6eb240976c6ae"},"schema_version":"1.0","source":{"id":"1111.1107","kind":"arxiv","version":1}},"canonical_sha256":"85ed4c4164f222ebb02a337a2f535a92c585660ced662cc311dbd6605616052e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"85ed4c4164f222ebb02a337a2f535a92c585660ced662cc311dbd6605616052e","first_computed_at":"2026-05-18T03:58:04.367677Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:58:04.367677Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"irWMN2xuzQYXJf0muZrNHVUsuc8eAgBdLAFmUyA5vKw/b/LvWjUGvgCAQo0tV/zsTUVW2mZUiAOfb3h8SDM5Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:58:04.368149Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.1107","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e7c641d4801fac1bfbd06c88522d46a83d4e5c3aea444dc7b0b7d1df0338e4ed","sha256:602e656fe726ecd66c1e3262b99b29e4b2690a577634228822b79e2327a6f67d"],"state_sha256":"c4481722c080002e75588cb5c7671a6eef656f62498a5d9d9f6c6108b0d3ae84"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+JZGioMIRClArsckQFAjjLCuLQh+nhooZIwygFKHPRhiefc6OnA0eDtph1nQkZxUmC9B1YDpCcmvuDTgPcTDDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T22:44:13.069572Z","bundle_sha256":"cecdf6715c37018669ed9e30d12653da6314ef86ee4bca1efd1247ce2a36658c"}}