{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:AJIICWHUJQSAO57RBQQPCKPAME","short_pith_number":"pith:AJIICWHU","canonical_record":{"source":{"id":"1209.3268","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-14T17:59:34Z","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.str-el"],"title_canon_sha256":"ef225596d892079d6a75464713e8746b0c39d3aaa619548378ca42207eeb81da","abstract_canon_sha256":"99b637a48c59c8b74b549df2bb761ccc2ba8d7733ef5248cbdb3b8ea6114cabb"},"schema_version":"1.0"},"canonical_sha256":"02508158f44c240777f10c20f129e0611cd8c5a6acc62e90822138867a27c61a","source":{"kind":"arxiv","id":"1209.3268","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.3268","created_at":"2026-05-18T03:31:29Z"},{"alias_kind":"arxiv_version","alias_value":"1209.3268v2","created_at":"2026-05-18T03:31:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.3268","created_at":"2026-05-18T03:31:29Z"},{"alias_kind":"pith_short_12","alias_value":"AJIICWHUJQSA","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AJIICWHUJQSAO57R","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AJIICWHU","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:AJIICWHUJQSAO57RBQQPCKPAME","target":"record","payload":{"canonical_record":{"source":{"id":"1209.3268","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-14T17:59:34Z","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.str-el"],"title_canon_sha256":"ef225596d892079d6a75464713e8746b0c39d3aaa619548378ca42207eeb81da","abstract_canon_sha256":"99b637a48c59c8b74b549df2bb761ccc2ba8d7733ef5248cbdb3b8ea6114cabb"},"schema_version":"1.0"},"canonical_sha256":"02508158f44c240777f10c20f129e0611cd8c5a6acc62e90822138867a27c61a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:31:29.464976Z","signature_b64":"2EvugV3lqxEAdM5qP2nktmrHfudjASvCWLVhsbv+jE/uLkZr9lUDoApne6ttiEh4yorrZHiueG5Ji1trjNbuAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"02508158f44c240777f10c20f129e0611cd8c5a6acc62e90822138867a27c61a","last_reissued_at":"2026-05-18T03:31:29.464142Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:31:29.464142Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.3268","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":"2026-05-18T03:31:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PJgbp3wJPd35OeKt2Trj5kvPUQj21bXuWTVJ3lbanaIkIMMN8AjqLLfq69lC+L2Z8DT63ffSZi6EFQki+jZBAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:21:23.299606Z"},"content_sha256":"e356a2f7e12d71668161120909ec4ba5e7f1fba15f00e1ab60e1b8d3060a9fb6","schema_version":"1.0","event_id":"sha256:e356a2f7e12d71668161120909ec4ba5e7f1fba15f00e1ab60e1b8d3060a9fb6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:AJIICWHUJQSAO57RBQQPCKPAME","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Entanglement enhancement in spatially inhomogeneous many-body systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.quant-gas","cond-mat.str-el"],"primary_cat":"quant-ph","authors_text":"Andreas Buchleitner, Erich Runge, Tobias Bruenner, Vivian V. Franca","submitted_at":"2012-09-14T17:59:34Z","abstract_excerpt":"We investigate the effects of spatial inhomogeneities on the entanglement of modes of strongly correlated systems in the framework of small Fermi-Hubbard chains. We find regimes where entanglement is strongly enhanced by the presence of inhomogeneities. This contrasts recent reports of entanglement destruction due to inhomogeneities. We further study this phenomenon using concepts of Density Functional Theory and, thus, provide a general recipe for the prediction of entanglement enhancement in nanostructures. We find enhancement of up to ~24%, as compared to impurity-free chains."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.3268","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":"2026-05-18T03:31:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WdpQR0fZCkkVZwM0FDNry+KwTCv4V3mSKqWfijQvx93B3KSPjJiNhtPb8wTGoDBJYfNfAAsobntRrs96wFMsBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:21:23.299969Z"},"content_sha256":"21b8ecb2fc2d2a5b5a6045237244bef51927e1d7e3e45625ccb130ad23384027","schema_version":"1.0","event_id":"sha256:21b8ecb2fc2d2a5b5a6045237244bef51927e1d7e3e45625ccb130ad23384027"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AJIICWHUJQSAO57RBQQPCKPAME/bundle.json","state_url":"https://pith.science/pith/AJIICWHUJQSAO57RBQQPCKPAME/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AJIICWHUJQSAO57RBQQPCKPAME/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":"2026-05-26T20:21:23Z","links":{"resolver":"https://pith.science/pith/AJIICWHUJQSAO57RBQQPCKPAME","bundle":"https://pith.science/pith/AJIICWHUJQSAO57RBQQPCKPAME/bundle.json","state":"https://pith.science/pith/AJIICWHUJQSAO57RBQQPCKPAME/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AJIICWHUJQSAO57RBQQPCKPAME/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:AJIICWHUJQSAO57RBQQPCKPAME","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":"99b637a48c59c8b74b549df2bb761ccc2ba8d7733ef5248cbdb3b8ea6114cabb","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-14T17:59:34Z","title_canon_sha256":"ef225596d892079d6a75464713e8746b0c39d3aaa619548378ca42207eeb81da"},"schema_version":"1.0","source":{"id":"1209.3268","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.3268","created_at":"2026-05-18T03:31:29Z"},{"alias_kind":"arxiv_version","alias_value":"1209.3268v2","created_at":"2026-05-18T03:31:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.3268","created_at":"2026-05-18T03:31:29Z"},{"alias_kind":"pith_short_12","alias_value":"AJIICWHUJQSA","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AJIICWHUJQSAO57R","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AJIICWHU","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:21b8ecb2fc2d2a5b5a6045237244bef51927e1d7e3e45625ccb130ad23384027","target":"graph","created_at":"2026-05-18T03:31:29Z","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 investigate the effects of spatial inhomogeneities on the entanglement of modes of strongly correlated systems in the framework of small Fermi-Hubbard chains. We find regimes where entanglement is strongly enhanced by the presence of inhomogeneities. This contrasts recent reports of entanglement destruction due to inhomogeneities. We further study this phenomenon using concepts of Density Functional Theory and, thus, provide a general recipe for the prediction of entanglement enhancement in nanostructures. We find enhancement of up to ~24%, as compared to impurity-free chains.","authors_text":"Andreas Buchleitner, Erich Runge, Tobias Bruenner, Vivian V. Franca","cross_cats":["cond-mat.quant-gas","cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-14T17:59:34Z","title":"Entanglement enhancement in spatially inhomogeneous many-body systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.3268","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:e356a2f7e12d71668161120909ec4ba5e7f1fba15f00e1ab60e1b8d3060a9fb6","target":"record","created_at":"2026-05-18T03:31:29Z","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":"99b637a48c59c8b74b549df2bb761ccc2ba8d7733ef5248cbdb3b8ea6114cabb","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-14T17:59:34Z","title_canon_sha256":"ef225596d892079d6a75464713e8746b0c39d3aaa619548378ca42207eeb81da"},"schema_version":"1.0","source":{"id":"1209.3268","kind":"arxiv","version":2}},"canonical_sha256":"02508158f44c240777f10c20f129e0611cd8c5a6acc62e90822138867a27c61a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"02508158f44c240777f10c20f129e0611cd8c5a6acc62e90822138867a27c61a","first_computed_at":"2026-05-18T03:31:29.464142Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:31:29.464142Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2EvugV3lqxEAdM5qP2nktmrHfudjASvCWLVhsbv+jE/uLkZr9lUDoApne6ttiEh4yorrZHiueG5Ji1trjNbuAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:31:29.464976Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.3268","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e356a2f7e12d71668161120909ec4ba5e7f1fba15f00e1ab60e1b8d3060a9fb6","sha256:21b8ecb2fc2d2a5b5a6045237244bef51927e1d7e3e45625ccb130ad23384027"],"state_sha256":"3cf538780a568cb18640de714ed1999e99cf03397b3d0407714076bfc8de40b5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uiwBqp/UVU01tPwIYTjHZSofWrpLBbYDxomgadkr9K/UQlPlipp7nwArTgGJ8h4AHNE7pCFvvkmIIaxGeMxWCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T20:21:23.303118Z","bundle_sha256":"0eda22bc40b27295765a153fd3204bea4faa97e4bf6330b3dbc6ca72d3cc85f7"}}