{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:RZGVU4SGMRHYVB5SP3M5K3L7D4","short_pith_number":"pith:RZGVU4SG","canonical_record":{"source":{"id":"2507.01486","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2025-07-02T08:47:10Z","cross_cats_sorted":[],"title_canon_sha256":"d3ba12d3eced7cacaaa272637f0b451b9101adf099ddca18bff0d046d5fe66b5","abstract_canon_sha256":"f7601858695c39bc74416ec30c552e9ee45c893ef4f7788805819d5824415652"},"schema_version":"1.0"},"canonical_sha256":"8e4d5a7246644f8a87b27ed9d56d7f1f17b0853e66b41f6aa4125dc400dcbb4d","source":{"kind":"arxiv","id":"2507.01486","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.01486","created_at":"2026-05-20T00:00:21Z"},{"alias_kind":"arxiv_version","alias_value":"2507.01486v3","created_at":"2026-05-20T00:00:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.01486","created_at":"2026-05-20T00:00:21Z"},{"alias_kind":"pith_short_12","alias_value":"RZGVU4SGMRHY","created_at":"2026-05-20T00:00:21Z"},{"alias_kind":"pith_short_16","alias_value":"RZGVU4SGMRHYVB5S","created_at":"2026-05-20T00:00:21Z"},{"alias_kind":"pith_short_8","alias_value":"RZGVU4SG","created_at":"2026-05-20T00:00:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:RZGVU4SGMRHYVB5SP3M5K3L7D4","target":"record","payload":{"canonical_record":{"source":{"id":"2507.01486","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2025-07-02T08:47:10Z","cross_cats_sorted":[],"title_canon_sha256":"d3ba12d3eced7cacaaa272637f0b451b9101adf099ddca18bff0d046d5fe66b5","abstract_canon_sha256":"f7601858695c39bc74416ec30c552e9ee45c893ef4f7788805819d5824415652"},"schema_version":"1.0"},"canonical_sha256":"8e4d5a7246644f8a87b27ed9d56d7f1f17b0853e66b41f6aa4125dc400dcbb4d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-20T00:00:21.846890Z","signature_b64":"X4Yl8iKvQ/rK7DViwGZz+bE/78gsg7Xof0fuLJT1e0ZMknODqLAvnv6cHGsQiz9Lp1q9pYkLGbul1q67yePDCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8e4d5a7246644f8a87b27ed9d56d7f1f17b0853e66b41f6aa4125dc400dcbb4d","last_reissued_at":"2026-05-20T00:00:21.846196Z","signature_status":"signed_v1","first_computed_at":"2026-05-20T00:00:21.846196Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.01486","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":"2026-05-20T00:00:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KGpF2zMaV+PR6MGXEzks6vfMX1+uU+N7ILI4G0ahbuGcmyLoWOT1g0+6CfbioM+re7N80ynu6af9Q05KwMugDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:31:19.471658Z"},"content_sha256":"7747b329da93042a137e7435b8423f21e7c121aaef6d6fd9bfb1f8123d6df313","schema_version":"1.0","event_id":"sha256:7747b329da93042a137e7435b8423f21e7c121aaef6d6fd9bfb1f8123d6df313"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:RZGVU4SGMRHYVB5SP3M5K3L7D4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exactly Solvable Phase Transition in a Cavity-Coupled 1D Ising Chain","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.stat-mech","authors_text":"Motoaki Bamba, Shuntaro Otake","submitted_at":"2025-07-02T08:47:10Z","abstract_excerpt":"Although one-dimensional classical spin chains do not exhibit phase transitions, we found that a phase transition does occur when they are coupled to a cavity photon mode. This provides the simplest exactly solvable examples demonstrating that finite-temperature superradiant phase transitions can emerge from long-range fully connected interactions mediated by photons and interactions within the material."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.01486","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.01486/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-20T00:00:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C6cisns3RN3DFoBdsA6ZbsWzwJ23kpDK3ozgTCFvoxYkphWZ7FZE3E2X0A5uYXcv9Xr1cLdhnxfbsGDelApZAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:31:19.472389Z"},"content_sha256":"d5bd9934209736c4e7d7c22949a04b98a7034bef7cb9020b6c6aeda1dc6d4ba1","schema_version":"1.0","event_id":"sha256:d5bd9934209736c4e7d7c22949a04b98a7034bef7cb9020b6c6aeda1dc6d4ba1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RZGVU4SGMRHYVB5SP3M5K3L7D4/bundle.json","state_url":"https://pith.science/pith/RZGVU4SGMRHYVB5SP3M5K3L7D4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RZGVU4SGMRHYVB5SP3M5K3L7D4/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":"2026-05-25T22:31:19Z","links":{"resolver":"https://pith.science/pith/RZGVU4SGMRHYVB5SP3M5K3L7D4","bundle":"https://pith.science/pith/RZGVU4SGMRHYVB5SP3M5K3L7D4/bundle.json","state":"https://pith.science/pith/RZGVU4SGMRHYVB5SP3M5K3L7D4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RZGVU4SGMRHYVB5SP3M5K3L7D4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:RZGVU4SGMRHYVB5SP3M5K3L7D4","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":"f7601858695c39bc74416ec30c552e9ee45c893ef4f7788805819d5824415652","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2025-07-02T08:47:10Z","title_canon_sha256":"d3ba12d3eced7cacaaa272637f0b451b9101adf099ddca18bff0d046d5fe66b5"},"schema_version":"1.0","source":{"id":"2507.01486","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.01486","created_at":"2026-05-20T00:00:21Z"},{"alias_kind":"arxiv_version","alias_value":"2507.01486v3","created_at":"2026-05-20T00:00:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.01486","created_at":"2026-05-20T00:00:21Z"},{"alias_kind":"pith_short_12","alias_value":"RZGVU4SGMRHY","created_at":"2026-05-20T00:00:21Z"},{"alias_kind":"pith_short_16","alias_value":"RZGVU4SGMRHYVB5S","created_at":"2026-05-20T00:00:21Z"},{"alias_kind":"pith_short_8","alias_value":"RZGVU4SG","created_at":"2026-05-20T00:00:21Z"}],"graph_snapshots":[{"event_id":"sha256:d5bd9934209736c4e7d7c22949a04b98a7034bef7cb9020b6c6aeda1dc6d4ba1","target":"graph","created_at":"2026-05-20T00:00:21Z","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/2507.01486/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Although one-dimensional classical spin chains do not exhibit phase transitions, we found that a phase transition does occur when they are coupled to a cavity photon mode. This provides the simplest exactly solvable examples demonstrating that finite-temperature superradiant phase transitions can emerge from long-range fully connected interactions mediated by photons and interactions within the material.","authors_text":"Motoaki Bamba, Shuntaro Otake","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2025-07-02T08:47:10Z","title":"Exactly Solvable Phase Transition in a Cavity-Coupled 1D Ising Chain"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.01486","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":"sha256:7747b329da93042a137e7435b8423f21e7c121aaef6d6fd9bfb1f8123d6df313","target":"record","created_at":"2026-05-20T00:00:21Z","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":"f7601858695c39bc74416ec30c552e9ee45c893ef4f7788805819d5824415652","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2025-07-02T08:47:10Z","title_canon_sha256":"d3ba12d3eced7cacaaa272637f0b451b9101adf099ddca18bff0d046d5fe66b5"},"schema_version":"1.0","source":{"id":"2507.01486","kind":"arxiv","version":3}},"canonical_sha256":"8e4d5a7246644f8a87b27ed9d56d7f1f17b0853e66b41f6aa4125dc400dcbb4d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8e4d5a7246644f8a87b27ed9d56d7f1f17b0853e66b41f6aa4125dc400dcbb4d","first_computed_at":"2026-05-20T00:00:21.846196Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-20T00:00:21.846196Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"X4Yl8iKvQ/rK7DViwGZz+bE/78gsg7Xof0fuLJT1e0ZMknODqLAvnv6cHGsQiz9Lp1q9pYkLGbul1q67yePDCQ==","signature_status":"signed_v1","signed_at":"2026-05-20T00:00:21.846890Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.01486","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7747b329da93042a137e7435b8423f21e7c121aaef6d6fd9bfb1f8123d6df313","sha256:d5bd9934209736c4e7d7c22949a04b98a7034bef7cb9020b6c6aeda1dc6d4ba1"],"state_sha256":"3880e13a99f9363c3e0ab3ec111263a56741863260463a4bac4d577fe7db8b94"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m1wFbCpu1NDcxPJrmPuMDIrL+taDMeuVfOzMJmh+2bIFwlTSnsQv9KiQwEfiWJQmAheuvO0rmn1vA3zW31d8Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:31:19.476353Z","bundle_sha256":"4fb97e8faf34adbd9f4617d9eb20ed406fd0868165211382f937cad6d4b8997b"}}