{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:YYFWAISZVSNJOINC4UNVRWLESY","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":"1ece59e306cb980fc44b3fabcfa3e74cb65ec48eec25f27b09d0f220ed036afa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2008-03-25T07:56:40Z","title_canon_sha256":"e85be16413941d205e226ba0a5d256a6864b35f54c33f14e6aeaf9e5c5174a57"},"schema_version":"1.0","source":{"id":"0803.3503","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0803.3503","created_at":"2026-05-18T04:31:12Z"},{"alias_kind":"arxiv_version","alias_value":"0803.3503v2","created_at":"2026-05-18T04:31:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0803.3503","created_at":"2026-05-18T04:31:12Z"},{"alias_kind":"pith_short_12","alias_value":"YYFWAISZVSNJ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"YYFWAISZVSNJOINC","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"YYFWAISZ","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:b712bcdce92af465be94bba2512356ae111cb9a5842ec9ecd72d61767b28d1cc","target":"graph","created_at":"2026-05-18T04:31:12Z","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":"An unusual increase of the conductance with temperature is observed in clean quantum point contacts for conductances larger than 2e^2/h. At the same time a positive magnetoresistance arises at high temperatures. A model accounting for electron-electron interactions mediated by bound- aries (scattering on Friedel oscillations) qualitatively describes the observation. It is supported by numerical simulation at zero magnetic field.","authors_text":"BRL, BRL), Institute of semiconductor Physics), J.-C. Portal (LCMI), LCMI), N. Kumada (NTT, O. A. Tkachenko (LCMI, SORST-JST, Tohoku University), T. Ota (NTT, V.A. Tkachenko (Institute of semiconductor Physics), Vincent Thomas Francois Renard (NTT, Y. Hirayama (NTT","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2008-03-25T07:56:40Z","title":"Boundary-mediated electron-electron interactions in quantum point contacts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0803.3503","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":"sha256:0520746204dffbec1bb86be6a922eaf1260d42500e106af087f345389790757a","target":"record","created_at":"2026-05-18T04:31:12Z","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":"1ece59e306cb980fc44b3fabcfa3e74cb65ec48eec25f27b09d0f220ed036afa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2008-03-25T07:56:40Z","title_canon_sha256":"e85be16413941d205e226ba0a5d256a6864b35f54c33f14e6aeaf9e5c5174a57"},"schema_version":"1.0","source":{"id":"0803.3503","kind":"arxiv","version":2}},"canonical_sha256":"c60b602259ac9a9721a2e51b58d96496010058b27341d8007cdc780726b72766","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c60b602259ac9a9721a2e51b58d96496010058b27341d8007cdc780726b72766","first_computed_at":"2026-05-18T04:31:12.365902Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:31:12.365902Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jqneA7juyZepFxG73tdIv3d2gk13t1d8mD0JieKK7KnJveVgHarpjNgx2a/MPy/ALcaufcD9zv2WMX4XclA5BA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:31:12.366538Z","signed_message":"canonical_sha256_bytes"},"source_id":"0803.3503","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0520746204dffbec1bb86be6a922eaf1260d42500e106af087f345389790757a","sha256:b712bcdce92af465be94bba2512356ae111cb9a5842ec9ecd72d61767b28d1cc"],"state_sha256":"f79520a85b7ae529cd2b2a656e1dd704a4e209e78ae67f54ef01547591af58c3"}