{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:F6UETZK6MTEWZTZ6CKS6DWLHXS","short_pith_number":"pith:F6UETZK6","canonical_record":{"source":{"id":"cond-mat/9809313","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"1998-09-23T13:04:57Z","cross_cats_sorted":[],"title_canon_sha256":"60fe31004bf42ff891c49b0b73a5989c8a1722af8561adee4d9462235e46cb72","abstract_canon_sha256":"865ba5abd2dae3db81d70af676a777b3548960d2d66ecde7fab627a351e67a91"},"schema_version":"1.0"},"canonical_sha256":"2fa849e55e64c96ccf3e12a5e1d967bcbfa9ac1e019d41936a2daf5e00eab1e6","source":{"kind":"arxiv","id":"cond-mat/9809313","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9809313","created_at":"2026-05-18T01:39:29Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9809313v1","created_at":"2026-05-18T01:39:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9809313","created_at":"2026-05-18T01:39:29Z"},{"alias_kind":"pith_short_12","alias_value":"F6UETZK6MTEW","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"F6UETZK6MTEWZTZ6","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"F6UETZK6","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:F6UETZK6MTEWZTZ6CKS6DWLHXS","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/9809313","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"1998-09-23T13:04:57Z","cross_cats_sorted":[],"title_canon_sha256":"60fe31004bf42ff891c49b0b73a5989c8a1722af8561adee4d9462235e46cb72","abstract_canon_sha256":"865ba5abd2dae3db81d70af676a777b3548960d2d66ecde7fab627a351e67a91"},"schema_version":"1.0"},"canonical_sha256":"2fa849e55e64c96ccf3e12a5e1d967bcbfa9ac1e019d41936a2daf5e00eab1e6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:39:29.930881Z","signature_b64":"ZWQFfUywoDqniT8Z5h92I99ddmGLbz/2F/iDgDsSga437MT6eHJsRP1dzLI9L3tEOG7rXMroXrwgOCzFWNVzDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2fa849e55e64c96ccf3e12a5e1d967bcbfa9ac1e019d41936a2daf5e00eab1e6","last_reissued_at":"2026-05-18T01:39:29.930259Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:39:29.930259Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/9809313","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:39:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZoqvvHymwAi+HJwKKFvnaR+DGyIFhmbVWrwG6FClYsO+9DePAw7jKKb6M34jcCYMhoUMyQPlUqWzOW8Cf5a1Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T17:27:55.549835Z"},"content_sha256":"f159a4f82436ddcb39d4a27ab945861608082a5bb6089d81cbbe719fad2582f9","schema_version":"1.0","event_id":"sha256:f159a4f82436ddcb39d4a27ab945861608082a5bb6089d81cbbe719fad2582f9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:F6UETZK6MTEWZTZ6CKS6DWLHXS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Effective field approach to the Ising film in a transverse field","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.stat-mech","authors_text":"Luca Peliti, Mohammed Saber","submitted_at":"1998-09-23T13:04:57Z","abstract_excerpt":"We study the phase transitions of the spin-1/2 Ising film in a transverse field within the framework of the effective field theory. We evaluate the critical temperature of the film as a function of the exchange interactions, the transverse field and the film thickness. We find that, if the ratio of the surface exchange interactions to the bulk ones R=Js/J is smaller than a critical value Rc, the critical temperature Tc/J of the film is smaller than the bulk critical temperature Tc^B/J and approaches Tc^B/J as R increases further. On the other hand, if R>Rc, Tc/J is larger than both the bulk Tc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9809313","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":""},"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":"2026-05-18T01:39:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zyhpd+1s3Fw6jKIL8pTmIh/9ZiEwtIyb3v5GSqF1l5pA8SY6JZS6OjisE0WE/bufmdBVCICXI0w68IOAEXnNBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T17:27:55.550200Z"},"content_sha256":"8ffedabd919e9874dd32ebb8d1d1f1b4acdaa343165c37fe8dbacef539643c9c","schema_version":"1.0","event_id":"sha256:8ffedabd919e9874dd32ebb8d1d1f1b4acdaa343165c37fe8dbacef539643c9c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F6UETZK6MTEWZTZ6CKS6DWLHXS/bundle.json","state_url":"https://pith.science/pith/F6UETZK6MTEWZTZ6CKS6DWLHXS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F6UETZK6MTEWZTZ6CKS6DWLHXS/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":"2026-05-31T17:27:55Z","links":{"resolver":"https://pith.science/pith/F6UETZK6MTEWZTZ6CKS6DWLHXS","bundle":"https://pith.science/pith/F6UETZK6MTEWZTZ6CKS6DWLHXS/bundle.json","state":"https://pith.science/pith/F6UETZK6MTEWZTZ6CKS6DWLHXS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F6UETZK6MTEWZTZ6CKS6DWLHXS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:F6UETZK6MTEWZTZ6CKS6DWLHXS","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":"865ba5abd2dae3db81d70af676a777b3548960d2d66ecde7fab627a351e67a91","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"1998-09-23T13:04:57Z","title_canon_sha256":"60fe31004bf42ff891c49b0b73a5989c8a1722af8561adee4d9462235e46cb72"},"schema_version":"1.0","source":{"id":"cond-mat/9809313","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9809313","created_at":"2026-05-18T01:39:29Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9809313v1","created_at":"2026-05-18T01:39:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9809313","created_at":"2026-05-18T01:39:29Z"},{"alias_kind":"pith_short_12","alias_value":"F6UETZK6MTEW","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"F6UETZK6MTEWZTZ6","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"F6UETZK6","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:8ffedabd919e9874dd32ebb8d1d1f1b4acdaa343165c37fe8dbacef539643c9c","target":"graph","created_at":"2026-05-18T01:39:29Z","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 study the phase transitions of the spin-1/2 Ising film in a transverse field within the framework of the effective field theory. We evaluate the critical temperature of the film as a function of the exchange interactions, the transverse field and the film thickness. We find that, if the ratio of the surface exchange interactions to the bulk ones R=Js/J is smaller than a critical value Rc, the critical temperature Tc/J of the film is smaller than the bulk critical temperature Tc^B/J and approaches Tc^B/J as R increases further. On the other hand, if R>Rc, Tc/J is larger than both the bulk Tc","authors_text":"Luca Peliti, Mohammed Saber","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"1998-09-23T13:04:57Z","title":"Effective field approach to the Ising film in a transverse field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9809313","kind":"arxiv","version":1},"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:f159a4f82436ddcb39d4a27ab945861608082a5bb6089d81cbbe719fad2582f9","target":"record","created_at":"2026-05-18T01:39:29Z","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":"865ba5abd2dae3db81d70af676a777b3548960d2d66ecde7fab627a351e67a91","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"1998-09-23T13:04:57Z","title_canon_sha256":"60fe31004bf42ff891c49b0b73a5989c8a1722af8561adee4d9462235e46cb72"},"schema_version":"1.0","source":{"id":"cond-mat/9809313","kind":"arxiv","version":1}},"canonical_sha256":"2fa849e55e64c96ccf3e12a5e1d967bcbfa9ac1e019d41936a2daf5e00eab1e6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2fa849e55e64c96ccf3e12a5e1d967bcbfa9ac1e019d41936a2daf5e00eab1e6","first_computed_at":"2026-05-18T01:39:29.930259Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:39:29.930259Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZWQFfUywoDqniT8Z5h92I99ddmGLbz/2F/iDgDsSga437MT6eHJsRP1dzLI9L3tEOG7rXMroXrwgOCzFWNVzDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:39:29.930881Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9809313","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f159a4f82436ddcb39d4a27ab945861608082a5bb6089d81cbbe719fad2582f9","sha256:8ffedabd919e9874dd32ebb8d1d1f1b4acdaa343165c37fe8dbacef539643c9c"],"state_sha256":"6cc519bb770d45a677f202fcb2eae4dd782fa4b24135015ba3a7d1fcb1e43b46"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W1BzISN13Q8fK8qsDGj25IQB5UCLzIwIqlduJ7533T+mJGtXDyI5LD7NYroZ4Z2pEFAGmaxleRmeApmLnpLqDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T17:27:55.552407Z","bundle_sha256":"481205072460e54d467805737f3be1a266e53a97cc63309ef15667dd63059926"}}