{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:PCBCXXLMMRWL4DFOTAMLIXAC5C","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":"bce86772592b9c6320f0cdb0291b671e9149f53c0194cfe2854b8b9e8299b0e5","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.stat-mech","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-01-17T19:07:33Z","title_canon_sha256":"047389eebd5773f9a9f3c7e332d9122e7b872cfe9dbf7584684f366836aa4696"},"schema_version":"1.0","source":{"id":"1801.05825","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.05825","created_at":"2026-05-18T00:10:54Z"},{"alias_kind":"arxiv_version","alias_value":"1801.05825v4","created_at":"2026-05-18T00:10:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.05825","created_at":"2026-05-18T00:10:54Z"},{"alias_kind":"pith_short_12","alias_value":"PCBCXXLMMRWL","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"PCBCXXLMMRWL4DFO","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"PCBCXXLM","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:eca3848f9287376fbf9e3b7398564236da50fc8cd230aaa239ff3593e378d826","target":"graph","created_at":"2026-05-18T00:10:54Z","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":"A versatile and efficient variational approach is developed to solve in- and out-of-equilibrium problems of generic quantum spin-impurity systems. Employing the discrete symmetry hidden in spin-impurity models, we present a new canonical transformation that completely decouples the impurity and bath degrees of freedom. Combining it with Gaussian states, we present a family of many-body states to efficiently encode nontrivial impurity-bath correlations. We demonstrate its successful application to the anisotropic and two-lead Kondo models by studying their spatiotemporal dynamics and universal ","authors_text":"Eugene Demler, J. Ignacio Cirac, Mari Carmen Ba\\~nuls, Tao Shi, Yuto Ashida","cross_cats":["cond-mat.quant-gas","cond-mat.stat-mech","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-01-17T19:07:33Z","title":"Solving quantum impurity problems in and out of equilibrium with variational approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.05825","kind":"arxiv","version":4},"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":"sha256:7431fcfb2346e36f30b2e9f4105955b49094363e37fc0799401cf5ca5a1c3991","target":"record","created_at":"2026-05-18T00:10:54Z","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":"bce86772592b9c6320f0cdb0291b671e9149f53c0194cfe2854b8b9e8299b0e5","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.stat-mech","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-01-17T19:07:33Z","title_canon_sha256":"047389eebd5773f9a9f3c7e332d9122e7b872cfe9dbf7584684f366836aa4696"},"schema_version":"1.0","source":{"id":"1801.05825","kind":"arxiv","version":4}},"canonical_sha256":"78822bdd6c646cbe0cae9818b45c02e8b612dc59e2cf58886723eb84d5b6616d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"78822bdd6c646cbe0cae9818b45c02e8b612dc59e2cf58886723eb84d5b6616d","first_computed_at":"2026-05-18T00:10:54.696027Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:54.696027Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hk1c+MBVbSnVzse2swi1C80T4rMVKR2M/noUsOdLX8ZfP9lsCL56g78jkIOb79GkQCy7VLJyPT0DzI7/C47/Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:54.696786Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.05825","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7431fcfb2346e36f30b2e9f4105955b49094363e37fc0799401cf5ca5a1c3991","sha256:eca3848f9287376fbf9e3b7398564236da50fc8cd230aaa239ff3593e378d826"],"state_sha256":"e7e1505fbde871d59015f13361402f94b52c879d8e5e07b88e467a9e7ffd493b"}