{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:HQQWI6ETOSLV6S7FKLF2POYMLC","short_pith_number":"pith:HQQWI6ET","canonical_record":{"source":{"id":"1001.5440","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-01-29T17:20:38Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"fb66ad96ae3f5d1f928df8621081c0922e189c6c690126965be999cbd0c5f08a","abstract_canon_sha256":"7c7acabc21a077b76e7be206f496c5a5ed3d69eeb97ba6cbaa5b59cac4a5674b"},"schema_version":"1.0"},"canonical_sha256":"3c2164789374975f4be552cba7bb0c589762ec5a551ccddb3141a7d6567f7dce","source":{"kind":"arxiv","id":"1001.5440","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.5440","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"arxiv_version","alias_value":"1001.5440v2","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.5440","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"pith_short_12","alias_value":"HQQWI6ETOSLV","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"HQQWI6ETOSLV6S7F","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"HQQWI6ET","created_at":"2026-05-18T12:26:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:HQQWI6ETOSLV6S7FKLF2POYMLC","target":"record","payload":{"canonical_record":{"source":{"id":"1001.5440","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-01-29T17:20:38Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"fb66ad96ae3f5d1f928df8621081c0922e189c6c690126965be999cbd0c5f08a","abstract_canon_sha256":"7c7acabc21a077b76e7be206f496c5a5ed3d69eeb97ba6cbaa5b59cac4a5674b"},"schema_version":"1.0"},"canonical_sha256":"3c2164789374975f4be552cba7bb0c589762ec5a551ccddb3141a7d6567f7dce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:09:22.098411Z","signature_b64":"yPYJlwMVzJgrZGsvja4TMH6TxGxqkSaEjpyGn7dJmRfOd00Mp0/kfK5yyG5we2POqd0ZIQpGlVzmStUKBAmpDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3c2164789374975f4be552cba7bb0c589762ec5a551ccddb3141a7d6567f7dce","last_reissued_at":"2026-05-18T02:09:22.097735Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:09:22.097735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1001.5440","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:09:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/uOWFoN6Iaq3Gr5vr4h00lvOtTBW5N1S+53UyYLZ3akxcrdfvHCCmRfRJj2cNdHV6/LbEZbQAPvvpstQqNH0Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T18:21:07.985920Z"},"content_sha256":"8e406925e6fa46c750d37b8b5084061e088ac524fb53e8d80750b0d35af2033b","schema_version":"1.0","event_id":"sha256:8e406925e6fa46c750d37b8b5084061e088ac524fb53e8d80750b0d35af2033b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:HQQWI6ETOSLV6S7FKLF2POYMLC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Manipulating and protecting entanglement by means of spin environments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"quant-ph","authors_text":"A. Cuccoli, C. Di Franco, F. Plastina, M. Paternostro, P. Verrucchi, T. J. G. Apollaro","submitted_at":"2010-01-29T17:20:38Z","abstract_excerpt":"We study the dynamical behavior of two initially entangled qubits, each locally coupled to an environment embodied by an interacting spin chain. We consider energy-exchange qubit-environment couplings resulting in a rich and highly non trivial entanglement dynamics. We obtain exact results for the time-evolution of the concurrence between the two qubits and find that, by tuning the interaction parameters, one can freeze the dynamics of entanglement, therefore inhibiting its relaxation into the spin environments, as well as activate a sudden-death phenomenon. We also discuss the effects of an e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.5440","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:09:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l/N2NI6zADLxxg6Z2Jqk00rbDSreq68qdAOIwbWqP3tT+gZ5y6C+tZTmXC7KUcOoCaWlBWKhW1U+brCcEmwvBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T18:21:07.986688Z"},"content_sha256":"443ef1b7b4d0326dc7a64a137913769b190a7e4b9e851ee3295b5e8bbbc0ee15","schema_version":"1.0","event_id":"sha256:443ef1b7b4d0326dc7a64a137913769b190a7e4b9e851ee3295b5e8bbbc0ee15"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HQQWI6ETOSLV6S7FKLF2POYMLC/bundle.json","state_url":"https://pith.science/pith/HQQWI6ETOSLV6S7FKLF2POYMLC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HQQWI6ETOSLV6S7FKLF2POYMLC/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":"2026-05-31T18:21:07Z","links":{"resolver":"https://pith.science/pith/HQQWI6ETOSLV6S7FKLF2POYMLC","bundle":"https://pith.science/pith/HQQWI6ETOSLV6S7FKLF2POYMLC/bundle.json","state":"https://pith.science/pith/HQQWI6ETOSLV6S7FKLF2POYMLC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HQQWI6ETOSLV6S7FKLF2POYMLC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:HQQWI6ETOSLV6S7FKLF2POYMLC","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":"7c7acabc21a077b76e7be206f496c5a5ed3d69eeb97ba6cbaa5b59cac4a5674b","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-01-29T17:20:38Z","title_canon_sha256":"fb66ad96ae3f5d1f928df8621081c0922e189c6c690126965be999cbd0c5f08a"},"schema_version":"1.0","source":{"id":"1001.5440","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.5440","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"arxiv_version","alias_value":"1001.5440v2","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.5440","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"pith_short_12","alias_value":"HQQWI6ETOSLV","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"HQQWI6ETOSLV6S7F","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"HQQWI6ET","created_at":"2026-05-18T12:26:07Z"}],"graph_snapshots":[{"event_id":"sha256:443ef1b7b4d0326dc7a64a137913769b190a7e4b9e851ee3295b5e8bbbc0ee15","target":"graph","created_at":"2026-05-18T02:09:22Z","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 dynamical behavior of two initially entangled qubits, each locally coupled to an environment embodied by an interacting spin chain. We consider energy-exchange qubit-environment couplings resulting in a rich and highly non trivial entanglement dynamics. We obtain exact results for the time-evolution of the concurrence between the two qubits and find that, by tuning the interaction parameters, one can freeze the dynamics of entanglement, therefore inhibiting its relaxation into the spin environments, as well as activate a sudden-death phenomenon. We also discuss the effects of an e","authors_text":"A. Cuccoli, C. Di Franco, F. Plastina, M. Paternostro, P. Verrucchi, T. J. G. Apollaro","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-01-29T17:20:38Z","title":"Manipulating and protecting entanglement by means of spin environments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.5440","kind":"arxiv","version":2},"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":"sha256:8e406925e6fa46c750d37b8b5084061e088ac524fb53e8d80750b0d35af2033b","target":"record","created_at":"2026-05-18T02:09:22Z","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":"7c7acabc21a077b76e7be206f496c5a5ed3d69eeb97ba6cbaa5b59cac4a5674b","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-01-29T17:20:38Z","title_canon_sha256":"fb66ad96ae3f5d1f928df8621081c0922e189c6c690126965be999cbd0c5f08a"},"schema_version":"1.0","source":{"id":"1001.5440","kind":"arxiv","version":2}},"canonical_sha256":"3c2164789374975f4be552cba7bb0c589762ec5a551ccddb3141a7d6567f7dce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3c2164789374975f4be552cba7bb0c589762ec5a551ccddb3141a7d6567f7dce","first_computed_at":"2026-05-18T02:09:22.097735Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:22.097735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yPYJlwMVzJgrZGsvja4TMH6TxGxqkSaEjpyGn7dJmRfOd00Mp0/kfK5yyG5we2POqd0ZIQpGlVzmStUKBAmpDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:22.098411Z","signed_message":"canonical_sha256_bytes"},"source_id":"1001.5440","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e406925e6fa46c750d37b8b5084061e088ac524fb53e8d80750b0d35af2033b","sha256:443ef1b7b4d0326dc7a64a137913769b190a7e4b9e851ee3295b5e8bbbc0ee15"],"state_sha256":"011f62db8fa8d35624f599c11624e1e96486627862a85717782ca7061bab8a3a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sVBR2IiXIvdbuHIm7/sK+GESOL/M2p69RQGzkDLXBBpmIrcNzRpdc1zI4fmSTbyO+ZvCm4enR+wmyRlhpUTUCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T18:21:07.990733Z","bundle_sha256":"66098119e53dbe82854655ef9aeef45f85bfbdc97c91f6ca8eefa340a2630c5a"}}