{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:GVD5OJGN6SWI22QIJMJWTR2DGU","short_pith_number":"pith:GVD5OJGN","schema_version":"1.0","canonical_sha256":"3547d724cdf4ac8d6a084b1369c743352c6be4d733950eee8522e84f32b3488f","source":{"kind":"arxiv","id":"2407.11391","version":1},"attestation_state":"computed","paper":{"title":"DMRG study of the theta-dependent mass spectrum in the 2-flavor Schwinger model","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.str-el","hep-th","quant-ph"],"primary_cat":"hep-lat","authors_text":"Akira Matsumoto, Etsuko Itou, Yuya Tanizaki","submitted_at":"2024-07-16T05:23:20Z","abstract_excerpt":"We study the $\\theta$-dependent mass spectrum of the massive $2$-flavor Schwinger model in the Hamiltonian formalism using the density-matrix renormalization group(DMRG). The masses of the composite particles, the pion and sigma meson, are computed by two independent methods. One is the improved one-point-function scheme, where we measure the local meson operator coupled to the boundary state and extract the mass from its exponential decay. Since the $\\theta$ term causes a nontrivial operator mixing, we unravel it by diagonalizing the correlation matrix to define the meson operator. The other "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2407.11391","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-lat","submitted_at":"2024-07-16T05:23:20Z","cross_cats_sorted":["cond-mat.str-el","hep-th","quant-ph"],"title_canon_sha256":"7becf65fea6bfaf0762a6d8709aacc74fab742451126fdb9338005f4412f0d5f","abstract_canon_sha256":"aea885aa34d2f06277ad74590f49e40a2a7c6949438a34e2ebc9a3da789ea319"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:44:23.795301Z","signature_b64":"Kb6BY5WW6kRZiBF8guyr6y8Zce9TolGSmhKAXffktt5myiTxgEJoQzQQ0INai1ib/rhaLXw7fZZagK3Q0eSKBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3547d724cdf4ac8d6a084b1369c743352c6be4d733950eee8522e84f32b3488f","last_reissued_at":"2026-07-05T08:44:23.794954Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:44:23.794954Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"DMRG study of the theta-dependent mass spectrum in the 2-flavor Schwinger model","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.str-el","hep-th","quant-ph"],"primary_cat":"hep-lat","authors_text":"Akira Matsumoto, Etsuko Itou, Yuya Tanizaki","submitted_at":"2024-07-16T05:23:20Z","abstract_excerpt":"We study the $\\theta$-dependent mass spectrum of the massive $2$-flavor Schwinger model in the Hamiltonian formalism using the density-matrix renormalization group(DMRG). The masses of the composite particles, the pion and sigma meson, are computed by two independent methods. One is the improved one-point-function scheme, where we measure the local meson operator coupled to the boundary state and extract the mass from its exponential decay. Since the $\\theta$ term causes a nontrivial operator mixing, we unravel it by diagonalizing the correlation matrix to define the meson operator. The other "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.11391","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2407.11391/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2407.11391","created_at":"2026-07-05T08:44:23.795009+00:00"},{"alias_kind":"arxiv_version","alias_value":"2407.11391v1","created_at":"2026-07-05T08:44:23.795009+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.11391","created_at":"2026-07-05T08:44:23.795009+00:00"},{"alias_kind":"pith_short_12","alias_value":"GVD5OJGN6SWI","created_at":"2026-07-05T08:44:23.795009+00:00"},{"alias_kind":"pith_short_16","alias_value":"GVD5OJGN6SWI22QI","created_at":"2026-07-05T08:44:23.795009+00:00"},{"alias_kind":"pith_short_8","alias_value":"GVD5OJGN","created_at":"2026-07-05T08:44:23.795009+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":6,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2606.22321","citing_title":"Multi-particle states investigation with tensor renormalization group method","ref_index":62,"is_internal_anchor":false},{"citing_arxiv_id":"2605.17183","citing_title":"Dense $\\mathrm{QC_2D_2}$ with uniform matrix product states","ref_index":21,"is_internal_anchor":false},{"citing_arxiv_id":"2508.16363","citing_title":"Infinite matrix product states for $(1+1)$-dimensional gauge theories","ref_index":46,"is_internal_anchor":false},{"citing_arxiv_id":"2509.02329","citing_title":"Fermion Discretization Effects in the Two-Flavor Lattice Schwinger Model: A Study with Matrix Product States","ref_index":41,"is_internal_anchor":false},{"citing_arxiv_id":"2601.02331","citing_title":"Quantum dynamics of cosmological particle production: interacting quantum field theories with matrix product states","ref_index":75,"is_internal_anchor":false},{"citing_arxiv_id":"2605.08042","citing_title":"The two-flavor Schwinger model at 50: Solving Coleman's puzzles","ref_index":40,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/GVD5OJGN6SWI22QIJMJWTR2DGU","json":"https://pith.science/pith/GVD5OJGN6SWI22QIJMJWTR2DGU.json","graph_json":"https://pith.science/api/pith-number/GVD5OJGN6SWI22QIJMJWTR2DGU/graph.json","events_json":"https://pith.science/api/pith-number/GVD5OJGN6SWI22QIJMJWTR2DGU/events.json","paper":"https://pith.science/paper/GVD5OJGN"},"agent_actions":{"view_html":"https://pith.science/pith/GVD5OJGN6SWI22QIJMJWTR2DGU","download_json":"https://pith.science/pith/GVD5OJGN6SWI22QIJMJWTR2DGU.json","view_paper":"https://pith.science/paper/GVD5OJGN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2407.11391&json=true","fetch_graph":"https://pith.science/api/pith-number/GVD5OJGN6SWI22QIJMJWTR2DGU/graph.json","fetch_events":"https://pith.science/api/pith-number/GVD5OJGN6SWI22QIJMJWTR2DGU/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GVD5OJGN6SWI22QIJMJWTR2DGU/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GVD5OJGN6SWI22QIJMJWTR2DGU/action/storage_attestation","attest_author":"https://pith.science/pith/GVD5OJGN6SWI22QIJMJWTR2DGU/action/author_attestation","sign_citation":"https://pith.science/pith/GVD5OJGN6SWI22QIJMJWTR2DGU/action/citation_signature","submit_replication":"https://pith.science/pith/GVD5OJGN6SWI22QIJMJWTR2DGU/action/replication_record"}},"created_at":"2026-07-05T08:44:23.795009+00:00","updated_at":"2026-07-05T08:44:23.795009+00:00"}