{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VWNBNXCDN4RV6WURF6BFLQ2GVB","short_pith_number":"pith:VWNBNXCD","canonical_record":{"source":{"id":"1805.00532","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-05-01T20:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"8d818b2b446fbafb5f2a37b680ebcf168ae97a34d37b2b4ad0d6738b63318d6d","abstract_canon_sha256":"e63d244997915525ecbf5aae272569b80f8a73d75a3396f5bffc6173ca3a9650"},"schema_version":"1.0"},"canonical_sha256":"ad9a16dc436f235f5a912f8255c346a86518a03bea4694a4ad36d3afd25580e4","source":{"kind":"arxiv","id":"1805.00532","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.00532","created_at":"2026-05-17T23:50:02Z"},{"alias_kind":"arxiv_version","alias_value":"1805.00532v3","created_at":"2026-05-17T23:50:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.00532","created_at":"2026-05-17T23:50:02Z"},{"alias_kind":"pith_short_12","alias_value":"VWNBNXCDN4RV","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VWNBNXCDN4RV6WUR","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VWNBNXCD","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VWNBNXCDN4RV6WURF6BFLQ2GVB","target":"record","payload":{"canonical_record":{"source":{"id":"1805.00532","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-05-01T20:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"8d818b2b446fbafb5f2a37b680ebcf168ae97a34d37b2b4ad0d6738b63318d6d","abstract_canon_sha256":"e63d244997915525ecbf5aae272569b80f8a73d75a3396f5bffc6173ca3a9650"},"schema_version":"1.0"},"canonical_sha256":"ad9a16dc436f235f5a912f8255c346a86518a03bea4694a4ad36d3afd25580e4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:02.641842Z","signature_b64":"X37RXsWbREGLpKQXwTMKxXaUb1+m2F9FazsJKb240F+dsqM57rFOgdv1D1tw6md/PmFG/TEG2IiZFOS7drDoBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad9a16dc436f235f5a912f8255c346a86518a03bea4694a4ad36d3afd25580e4","last_reissued_at":"2026-05-17T23:50:02.641216Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:02.641216Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.00532","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":"2026-05-17T23:50:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0rMT/rK4LVwr78YXdR+9rZBExpBM3Av28Yos1wueuOsaNmxc8mWmJ5yupNqdo6yswLgBwvMoenLUQhBvPj8yAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:57:25.384445Z"},"content_sha256":"eba5eacc4855e49a51ee3553aeca4040d753bafd36ca238703f976d744b0c61e","schema_version":"1.0","event_id":"sha256:eba5eacc4855e49a51ee3553aeca4040d753bafd36ca238703f976d744b0c61e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VWNBNXCDN4RV6WURF6BFLQ2GVB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Deforming the Fredkin spin chain away from its frustration-free point","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Khagendra Adhikari, K. S. D. Beach","submitted_at":"2018-05-01T20:00:00Z","abstract_excerpt":"The Fredkin model describes a spin-half chain segment subject to three-body, correlated-exchange interactions and twisted boundary conditions. The model is frustration-free, and its ground state wave function is known exactly. Its low-energy physics is that of a strong xy ferromagnet with gapless excitations and an unusually large dynamical exponent. We study a generalized spin chain model that includes the Fredkin model as a special tuning point and otherwise interpolates between the conventional ferromagnetic and antiferromagnetic quantum Heisenberg models. We solve for the low-lying states,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.00532","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":"2026-05-17T23:50:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iHaUEiZf7AI+58YqNAavbbg8gzAHPR1hGzYwk0wMATRhUAle/o2QdDK3IpRDMDy2bqjzDt4Vg+VN6yV6iSzNCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:57:25.384800Z"},"content_sha256":"951d393c8c685cf532cbbb85fd2d4772d9826587e7e80b3fdbf42b3f0a5de00c","schema_version":"1.0","event_id":"sha256:951d393c8c685cf532cbbb85fd2d4772d9826587e7e80b3fdbf42b3f0a5de00c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VWNBNXCDN4RV6WURF6BFLQ2GVB/bundle.json","state_url":"https://pith.science/pith/VWNBNXCDN4RV6WURF6BFLQ2GVB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VWNBNXCDN4RV6WURF6BFLQ2GVB/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":"2026-05-28T14:57:25Z","links":{"resolver":"https://pith.science/pith/VWNBNXCDN4RV6WURF6BFLQ2GVB","bundle":"https://pith.science/pith/VWNBNXCDN4RV6WURF6BFLQ2GVB/bundle.json","state":"https://pith.science/pith/VWNBNXCDN4RV6WURF6BFLQ2GVB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VWNBNXCDN4RV6WURF6BFLQ2GVB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VWNBNXCDN4RV6WURF6BFLQ2GVB","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":"e63d244997915525ecbf5aae272569b80f8a73d75a3396f5bffc6173ca3a9650","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-05-01T20:00:00Z","title_canon_sha256":"8d818b2b446fbafb5f2a37b680ebcf168ae97a34d37b2b4ad0d6738b63318d6d"},"schema_version":"1.0","source":{"id":"1805.00532","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.00532","created_at":"2026-05-17T23:50:02Z"},{"alias_kind":"arxiv_version","alias_value":"1805.00532v3","created_at":"2026-05-17T23:50:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.00532","created_at":"2026-05-17T23:50:02Z"},{"alias_kind":"pith_short_12","alias_value":"VWNBNXCDN4RV","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VWNBNXCDN4RV6WUR","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VWNBNXCD","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:951d393c8c685cf532cbbb85fd2d4772d9826587e7e80b3fdbf42b3f0a5de00c","target":"graph","created_at":"2026-05-17T23:50:02Z","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":"The Fredkin model describes a spin-half chain segment subject to three-body, correlated-exchange interactions and twisted boundary conditions. The model is frustration-free, and its ground state wave function is known exactly. Its low-energy physics is that of a strong xy ferromagnet with gapless excitations and an unusually large dynamical exponent. We study a generalized spin chain model that includes the Fredkin model as a special tuning point and otherwise interpolates between the conventional ferromagnetic and antiferromagnetic quantum Heisenberg models. We solve for the low-lying states,","authors_text":"Khagendra Adhikari, K. S. D. Beach","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-05-01T20:00:00Z","title":"Deforming the Fredkin spin chain away from its frustration-free point"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.00532","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:eba5eacc4855e49a51ee3553aeca4040d753bafd36ca238703f976d744b0c61e","target":"record","created_at":"2026-05-17T23:50:02Z","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":"e63d244997915525ecbf5aae272569b80f8a73d75a3396f5bffc6173ca3a9650","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-05-01T20:00:00Z","title_canon_sha256":"8d818b2b446fbafb5f2a37b680ebcf168ae97a34d37b2b4ad0d6738b63318d6d"},"schema_version":"1.0","source":{"id":"1805.00532","kind":"arxiv","version":3}},"canonical_sha256":"ad9a16dc436f235f5a912f8255c346a86518a03bea4694a4ad36d3afd25580e4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad9a16dc436f235f5a912f8255c346a86518a03bea4694a4ad36d3afd25580e4","first_computed_at":"2026-05-17T23:50:02.641216Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:02.641216Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"X37RXsWbREGLpKQXwTMKxXaUb1+m2F9FazsJKb240F+dsqM57rFOgdv1D1tw6md/PmFG/TEG2IiZFOS7drDoBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:02.641842Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.00532","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eba5eacc4855e49a51ee3553aeca4040d753bafd36ca238703f976d744b0c61e","sha256:951d393c8c685cf532cbbb85fd2d4772d9826587e7e80b3fdbf42b3f0a5de00c"],"state_sha256":"0c94393d6a312633e0069df4aaae5ff272b0c2995f5167b71e5e2e8020ce2afc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"btROuDQ+HS8Ydn21wMy220FuHPS70Lf3i5p6nDUv2mdzkB/dAfSgSpHesVl5yhuYS25wMxl18l4Eu4UtUhpqBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T14:57:25.386774Z","bundle_sha256":"24d6206d11117e3c61145ccb0668fb7d792becaefeaeba2aecec2028da15c2f5"}}