{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:L6XRPNCALCTWK3PNCRCIAAFKNL","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":"50be89678fd01cf68b93814ee7d4b0aa7c17af9854d71e913cbe84c3db84d09b","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-07-14T17:08:59Z","title_canon_sha256":"82e4e23658b269fae318776bfc417b06c4f0d1210e192a133db32b8871efd6a5"},"schema_version":"1.0","source":{"id":"1507.03930","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.03930","created_at":"2026-05-18T01:29:45Z"},{"alias_kind":"arxiv_version","alias_value":"1507.03930v2","created_at":"2026-05-18T01:29:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.03930","created_at":"2026-05-18T01:29:45Z"},{"alias_kind":"pith_short_12","alias_value":"L6XRPNCALCTW","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"L6XRPNCALCTWK3PN","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"L6XRPNCA","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:1fb13691f212e06d254ef7277c1a24f381a2509ddf54c984fcb229144dfe9de3","target":"graph","created_at":"2026-05-18T01:29:45Z","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 the low energy properties of a device with $N+1$ quantum dots in a star configuration. A central quantum dot is tunnel coupled to source and drain electrodes and to $N$ quantum dots. Extending previous results for the $N=2$ case we show that, in the appropriate parameter regime, the low energy Hamiltonian of the system is a ferromagnetic Kondo model for a $S=(N-1)/2$ impurity spin. For small enough interdot tunnel coupling, however, a two-stage Kondo effect takes place as the temperature is decreased. The spin $1/2$ in the central quantum dot is Kondo screened first and at lower tem","authors_text":"D. J. Garc\\'ia, J. A. Andrade, Pablo S. Cornaglia","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-07-14T17:08:59Z","title":"Ferromagnetic and underscreened Kondo behavior in quantum dot arrays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.03930","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":"sha256:615d386e084648409245e2a775f5648a7a062b1b7e470eedd3f90e643b33833e","target":"record","created_at":"2026-05-18T01:29:45Z","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":"50be89678fd01cf68b93814ee7d4b0aa7c17af9854d71e913cbe84c3db84d09b","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-07-14T17:08:59Z","title_canon_sha256":"82e4e23658b269fae318776bfc417b06c4f0d1210e192a133db32b8871efd6a5"},"schema_version":"1.0","source":{"id":"1507.03930","kind":"arxiv","version":2}},"canonical_sha256":"5faf17b44058a7656ded14448000aa6aeeb7a3fdb8bdc27783794c34216ac826","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5faf17b44058a7656ded14448000aa6aeeb7a3fdb8bdc27783794c34216ac826","first_computed_at":"2026-05-18T01:29:45.385183Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:29:45.385183Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U7Kb2nM/krEQRZnzeiyujw/CPrmVmGMUOD/8DSuYZVnqX1pPnvrwm2fBoxSEt7Ehh+boNNxUF1YJhi1j5tZbAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:29:45.385671Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.03930","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:615d386e084648409245e2a775f5648a7a062b1b7e470eedd3f90e643b33833e","sha256:1fb13691f212e06d254ef7277c1a24f381a2509ddf54c984fcb229144dfe9de3"],"state_sha256":"54908d1115f30090686dc71ffbbe3aa410709492dabb029a74c55553c0483eb5"}