{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:ZHSNYJS3PPIUOKU3UZ2JMJ2UXA","short_pith_number":"pith:ZHSNYJS3","schema_version":"1.0","canonical_sha256":"c9e4dc265b7bd1472a9ba674962754b82c21b9c95aea8cbc3d690f743c97d840","source":{"kind":"arxiv","id":"2202.11113","version":2},"attestation_state":"computed","paper":{"title":"Reduced density matrix and entanglement in interacting quantum field theory with Hamiltonian truncation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"quant-ph","authors_text":"Ivan Kukuljan, Patrick Emonts","submitted_at":"2022-02-22T19:00:05Z","abstract_excerpt":"Entanglement is the fundamental difference between classical and quantum systems and has become one of the guiding principles in the exploration of high- and low-energy physics. The calculation of entanglement entropies in interacting quantum field theories, however, remains challenging. Here, we present the first method for the explicit computation of reduced density matrices of interacting quantum field theories using truncated Hamiltonian methods. The method is based on constructing an isomorphism between the Hilbert space of the full system and the tensor product of Hilbert spaces of sub-i"},"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":"2202.11113","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-02-22T19:00:05Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"b5bd196678b49e281db711816815332e351f68152918cc9213b35e27b1f729c5","abstract_canon_sha256":"84d1371c25116537601e7d708ef8c125ab23d5917b05f04aedcc41116b423244"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:48:42.869499Z","signature_b64":"1sA5GJdmkXPF1AT6nfLmC09vzyx8plO9ur7e/nQCg5HJak2h8pdYlxV7LS3dxgLYFofMFpWS2/pX/Yl34VP1Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c9e4dc265b7bd1472a9ba674962754b82c21b9c95aea8cbc3d690f743c97d840","last_reissued_at":"2026-07-05T04:48:42.869094Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:48:42.869094Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Reduced density matrix and entanglement in interacting quantum field theory with Hamiltonian truncation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"quant-ph","authors_text":"Ivan Kukuljan, Patrick Emonts","submitted_at":"2022-02-22T19:00:05Z","abstract_excerpt":"Entanglement is the fundamental difference between classical and quantum systems and has become one of the guiding principles in the exploration of high- and low-energy physics. The calculation of entanglement entropies in interacting quantum field theories, however, remains challenging. Here, we present the first method for the explicit computation of reduced density matrices of interacting quantum field theories using truncated Hamiltonian methods. The method is based on constructing an isomorphism between the Hilbert space of the full system and the tensor product of Hilbert spaces of sub-i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.11113","kind":"arxiv","version":2},"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/2202.11113/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":"2202.11113","created_at":"2026-07-05T04:48:42.869148+00:00"},{"alias_kind":"arxiv_version","alias_value":"2202.11113v2","created_at":"2026-07-05T04:48:42.869148+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.11113","created_at":"2026-07-05T04:48:42.869148+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZHSNYJS3PPIU","created_at":"2026-07-05T04:48:42.869148+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZHSNYJS3PPIUOKU3","created_at":"2026-07-05T04:48:42.869148+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZHSNYJS3","created_at":"2026-07-05T04:48:42.869148+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA","json":"https://pith.science/pith/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA.json","graph_json":"https://pith.science/api/pith-number/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA/graph.json","events_json":"https://pith.science/api/pith-number/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA/events.json","paper":"https://pith.science/paper/ZHSNYJS3"},"agent_actions":{"view_html":"https://pith.science/pith/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA","download_json":"https://pith.science/pith/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA.json","view_paper":"https://pith.science/paper/ZHSNYJS3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2202.11113&json=true","fetch_graph":"https://pith.science/api/pith-number/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA/graph.json","fetch_events":"https://pith.science/api/pith-number/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA/action/storage_attestation","attest_author":"https://pith.science/pith/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA/action/author_attestation","sign_citation":"https://pith.science/pith/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA/action/citation_signature","submit_replication":"https://pith.science/pith/ZHSNYJS3PPIUOKU3UZ2JMJ2UXA/action/replication_record"}},"created_at":"2026-07-05T04:48:42.869148+00:00","updated_at":"2026-07-05T04:48:42.869148+00:00"}