{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:Q2QGZSTXJ7YPWEIGSXS4BZ54KN","short_pith_number":"pith:Q2QGZSTX","canonical_record":{"source":{"id":"1902.04474","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2019-02-12T16:22:14Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"6e3dc005d2445eee2ab0000a3de7012778ca61a7cc61755d8bbac1778ccd111e","abstract_canon_sha256":"8459f0dca0c234c808babdb992e59c0fff40150022d6d0c53133c6c8a6ec3b9e"},"schema_version":"1.0"},"canonical_sha256":"86a06cca774ff0fb110695e5c0e7bc534f1d6f85fa7932cd275f8b89c22587fe","source":{"kind":"arxiv","id":"1902.04474","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.04474","created_at":"2026-05-17T23:40:11Z"},{"alias_kind":"arxiv_version","alias_value":"1902.04474v3","created_at":"2026-05-17T23:40:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.04474","created_at":"2026-05-17T23:40:11Z"},{"alias_kind":"pith_short_12","alias_value":"Q2QGZSTXJ7YP","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"Q2QGZSTXJ7YPWEIG","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"Q2QGZSTX","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:Q2QGZSTXJ7YPWEIGSXS4BZ54KN","target":"record","payload":{"canonical_record":{"source":{"id":"1902.04474","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2019-02-12T16:22:14Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"6e3dc005d2445eee2ab0000a3de7012778ca61a7cc61755d8bbac1778ccd111e","abstract_canon_sha256":"8459f0dca0c234c808babdb992e59c0fff40150022d6d0c53133c6c8a6ec3b9e"},"schema_version":"1.0"},"canonical_sha256":"86a06cca774ff0fb110695e5c0e7bc534f1d6f85fa7932cd275f8b89c22587fe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:11.231661Z","signature_b64":"TEACiUDN1+GVen2x6YwbFhTkUFjEdHkNfBqKKmLp80arQAfUaC8Id0Sx/m6Y//aszf+ICfXbr68X+cQSCcf4Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"86a06cca774ff0fb110695e5c0e7bc534f1d6f85fa7932cd275f8b89c22587fe","last_reissued_at":"2026-05-17T23:40:11.231023Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:11.231023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.04474","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:40:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zHCsXyZMy9D6mSs5aAeoUB/kHuulbAEMf07nBsbXWQmWncd2Ls7tniUdTAY8gAAdXgCGcgEli9nX3+kaRdxZAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T08:16:33.069164Z"},"content_sha256":"1b23a11b981945cee268a7b88b5aa67d28ffbea8546ebdd12103c97c5706eda5","schema_version":"1.0","event_id":"sha256:1b23a11b981945cee268a7b88b5aa67d28ffbea8546ebdd12103c97c5706eda5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:Q2QGZSTXJ7YPWEIGSXS4BZ54KN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the continuum limit of the entanglement Hamiltonian","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"cond-mat.stat-mech","authors_text":"Erik Tonni, Ingo Peschel, Viktor Eisler","submitted_at":"2019-02-12T16:22:14Z","abstract_excerpt":"We consider the entanglement Hamiltonian for an interval in a chain of free fermions in its ground state and show that the lattice expression goes over into the conformal one if one includes the hopping to distant neighbours in the continuum limit. For an infinite chain, this can be done analytically for arbitrary fillings and is shown to be the consequence of the particular structure of the entanglement Hamiltonian, while for finite rings or temperatures the result is based on numerical calculations."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.04474","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:40:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"to2f09mbzycobpDBQzco2Iiq6GYnREVe9pmshGHQlBhyhqzJAgl8CFafX7DPvOPj/iPZcG/h1dGP+wRHdqQfCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T08:16:33.069833Z"},"content_sha256":"2b9f55a92258faf264bbdcd97417b016afa77763a8d7c25c87a814ee49c23dba","schema_version":"1.0","event_id":"sha256:2b9f55a92258faf264bbdcd97417b016afa77763a8d7c25c87a814ee49c23dba"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q2QGZSTXJ7YPWEIGSXS4BZ54KN/bundle.json","state_url":"https://pith.science/pith/Q2QGZSTXJ7YPWEIGSXS4BZ54KN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q2QGZSTXJ7YPWEIGSXS4BZ54KN/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-22T08:16:33Z","links":{"resolver":"https://pith.science/pith/Q2QGZSTXJ7YPWEIGSXS4BZ54KN","bundle":"https://pith.science/pith/Q2QGZSTXJ7YPWEIGSXS4BZ54KN/bundle.json","state":"https://pith.science/pith/Q2QGZSTXJ7YPWEIGSXS4BZ54KN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q2QGZSTXJ7YPWEIGSXS4BZ54KN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:Q2QGZSTXJ7YPWEIGSXS4BZ54KN","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":"8459f0dca0c234c808babdb992e59c0fff40150022d6d0c53133c6c8a6ec3b9e","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2019-02-12T16:22:14Z","title_canon_sha256":"6e3dc005d2445eee2ab0000a3de7012778ca61a7cc61755d8bbac1778ccd111e"},"schema_version":"1.0","source":{"id":"1902.04474","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.04474","created_at":"2026-05-17T23:40:11Z"},{"alias_kind":"arxiv_version","alias_value":"1902.04474v3","created_at":"2026-05-17T23:40:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.04474","created_at":"2026-05-17T23:40:11Z"},{"alias_kind":"pith_short_12","alias_value":"Q2QGZSTXJ7YP","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"Q2QGZSTXJ7YPWEIG","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"Q2QGZSTX","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:2b9f55a92258faf264bbdcd97417b016afa77763a8d7c25c87a814ee49c23dba","target":"graph","created_at":"2026-05-17T23:40:11Z","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 consider the entanglement Hamiltonian for an interval in a chain of free fermions in its ground state and show that the lattice expression goes over into the conformal one if one includes the hopping to distant neighbours in the continuum limit. For an infinite chain, this can be done analytically for arbitrary fillings and is shown to be the consequence of the particular structure of the entanglement Hamiltonian, while for finite rings or temperatures the result is based on numerical calculations.","authors_text":"Erik Tonni, Ingo Peschel, Viktor Eisler","cross_cats":["hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2019-02-12T16:22:14Z","title":"On the continuum limit of the entanglement Hamiltonian"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.04474","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":"sha256:1b23a11b981945cee268a7b88b5aa67d28ffbea8546ebdd12103c97c5706eda5","target":"record","created_at":"2026-05-17T23:40:11Z","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":"8459f0dca0c234c808babdb992e59c0fff40150022d6d0c53133c6c8a6ec3b9e","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2019-02-12T16:22:14Z","title_canon_sha256":"6e3dc005d2445eee2ab0000a3de7012778ca61a7cc61755d8bbac1778ccd111e"},"schema_version":"1.0","source":{"id":"1902.04474","kind":"arxiv","version":3}},"canonical_sha256":"86a06cca774ff0fb110695e5c0e7bc534f1d6f85fa7932cd275f8b89c22587fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"86a06cca774ff0fb110695e5c0e7bc534f1d6f85fa7932cd275f8b89c22587fe","first_computed_at":"2026-05-17T23:40:11.231023Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:11.231023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TEACiUDN1+GVen2x6YwbFhTkUFjEdHkNfBqKKmLp80arQAfUaC8Id0Sx/m6Y//aszf+ICfXbr68X+cQSCcf4Bw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:11.231661Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.04474","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b23a11b981945cee268a7b88b5aa67d28ffbea8546ebdd12103c97c5706eda5","sha256:2b9f55a92258faf264bbdcd97417b016afa77763a8d7c25c87a814ee49c23dba"],"state_sha256":"016634c16528047e7bcd2411e9247622469dab6554e261ce1f7087d4ad09f128"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hZnHvko9WvetQH9HeY4B2eGXpSfApiV5zYEkcIaWXfOtVGcXAiM6rgCe8GjJqrqdUDa1Yu3kal5OvWbpJNmXBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T08:16:33.073435Z","bundle_sha256":"ffc19f00369336811b1dc4707089739d5fce16a998a971d54df9912751a60a14"}}