{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:KQYYRQRDEICNBEBKBRRL76HMA5","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":"47a7a6c1ff4b712cc9ab8463e37418b5fc541c8c44f0eab81d048d915335bbcd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-22T12:14:05Z","title_canon_sha256":"37e05ced4adc48a777340d2c660705bf15f4787dc9f5beaf772ae652a2f40d71"},"schema_version":"1.0","source":{"id":"1903.09468","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.09468","created_at":"2026-07-04T23:55:38Z"},{"alias_kind":"arxiv_version","alias_value":"1903.09468v3","created_at":"2026-07-04T23:55:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.09468","created_at":"2026-07-04T23:55:38Z"},{"alias_kind":"pith_short_12","alias_value":"KQYYRQRDEICN","created_at":"2026-07-04T23:55:38Z"},{"alias_kind":"pith_short_16","alias_value":"KQYYRQRDEICNBEBK","created_at":"2026-07-04T23:55:38Z"},{"alias_kind":"pith_short_8","alias_value":"KQYYRQRD","created_at":"2026-07-04T23:55:38Z"}],"graph_snapshots":[{"event_id":"sha256:7ddc256933a2b54a03a705d103f6d5fffdf0a71351003b7dab0f8ee608acbb92","target":"graph","created_at":"2026-07-04T23:55:38Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1903.09468/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study a finite spin-$\\frac{1}{2}$ Ising chain with a spatially alternating transverse field of period 2. By means of a Jordan-Wigner transformation for even and odd sites, we are able to map it into a one-dimensional model of free fermions. We determine the ground-state energies in the positive- and negative-parity subspaces (subspaces with an even or odd total number of down spins, respectively) and compare them in order to establish the ground-state energy for the entire Hamiltonian. We derive closed-form expressions for this energy gap between the different parity subspaces and analyze i","authors_text":"Adalberto D. Varizi, Raphael C. Drumond","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-22T12:14:05Z","title":"Quantum Ising model in a period-2 modulated transverse field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.09468","kind":"arxiv","version":3},"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":"sha256:5936fbfc2e5d54c33764dc272178b149b611305d5bc1f0fb0cf1c29e6c1a7fc3","target":"record","created_at":"2026-07-04T23:55:38Z","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":"47a7a6c1ff4b712cc9ab8463e37418b5fc541c8c44f0eab81d048d915335bbcd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-22T12:14:05Z","title_canon_sha256":"37e05ced4adc48a777340d2c660705bf15f4787dc9f5beaf772ae652a2f40d71"},"schema_version":"1.0","source":{"id":"1903.09468","kind":"arxiv","version":3}},"canonical_sha256":"543188c2232204d0902a0c62bff8ec077dd5c5c86178a9162bb62eabc0751ca3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"543188c2232204d0902a0c62bff8ec077dd5c5c86178a9162bb62eabc0751ca3","first_computed_at":"2026-07-04T23:55:38.717623Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:55:38.717623Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WXOmFXau4Dsi7fSfu8gECFqUaZaNzV24bOdUFbpTqiXi1rYkHA9IoaR7rV53Z0FYJ1w1DIy5m38xDP76EDZmCw==","signature_status":"signed_v1","signed_at":"2026-07-04T23:55:38.718158Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.09468","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5936fbfc2e5d54c33764dc272178b149b611305d5bc1f0fb0cf1c29e6c1a7fc3","sha256:7ddc256933a2b54a03a705d103f6d5fffdf0a71351003b7dab0f8ee608acbb92"],"state_sha256":"0b2b2ddae737507bb121a9075d4ceab4f9480831ce0ba7f487c1b22150f87107"}