{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:OTTYFWY5YB7XM53QP5CN5SVYL3","short_pith_number":"pith:OTTYFWY5","canonical_record":{"source":{"id":"1204.0595","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-04-03T04:40:27Z","cross_cats_sorted":["cond-mat.stat-mech"],"title_canon_sha256":"844c6208c2a098c1b91372f08bd856c6632701ed1b17ee4d2be35e53cd594602","abstract_canon_sha256":"f10cf7fe0ab9f3ee256916531d4a716b907a330e431261f823f533a8811acbef"},"schema_version":"1.0"},"canonical_sha256":"74e782db1dc07f7677707f44decab85ef5039aba6b5ddc994a85e2e6ad3e72f2","source":{"kind":"arxiv","id":"1204.0595","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.0595","created_at":"2026-05-18T03:48:44Z"},{"alias_kind":"arxiv_version","alias_value":"1204.0595v2","created_at":"2026-05-18T03:48:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.0595","created_at":"2026-05-18T03:48:44Z"},{"alias_kind":"pith_short_12","alias_value":"OTTYFWY5YB7X","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"OTTYFWY5YB7XM53Q","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"OTTYFWY5","created_at":"2026-05-18T12:27:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:OTTYFWY5YB7XM53QP5CN5SVYL3","target":"record","payload":{"canonical_record":{"source":{"id":"1204.0595","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-04-03T04:40:27Z","cross_cats_sorted":["cond-mat.stat-mech"],"title_canon_sha256":"844c6208c2a098c1b91372f08bd856c6632701ed1b17ee4d2be35e53cd594602","abstract_canon_sha256":"f10cf7fe0ab9f3ee256916531d4a716b907a330e431261f823f533a8811acbef"},"schema_version":"1.0"},"canonical_sha256":"74e782db1dc07f7677707f44decab85ef5039aba6b5ddc994a85e2e6ad3e72f2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:48:44.920582Z","signature_b64":"+HkhVRgO1rFsWpWCmJ5bjtjvPS35ULqHP5lwfMZUvprT5oshSTYSFLEV8g3SkTHJW4BWG34reRBskCtOJzAmBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"74e782db1dc07f7677707f44decab85ef5039aba6b5ddc994a85e2e6ad3e72f2","last_reissued_at":"2026-05-18T03:48:44.920021Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:48:44.920021Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1204.0595","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:48:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SGqMYCyq7+nz3fj+9ifSdz31eLh683TJo9oY2iFWF+iuwjCs3qctrFo6/9v96dW53aehtF52YFi61Z1LsROsBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T22:32:06.140421Z"},"content_sha256":"59a572cdd8b1898c808dd217027dade62041c2ae1f139d8207b3d938d739cf78","schema_version":"1.0","event_id":"sha256:59a572cdd8b1898c808dd217027dade62041c2ae1f139d8207b3d938d739cf78"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:OTTYFWY5YB7XM53QP5CN5SVYL3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum order by disorder and accidental soft mode Er2Ti2O7","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.stat-mech"],"primary_cat":"cond-mat.str-el","authors_text":"M. E. Zhitomirsky, M. V. Gvozdikova, P. C. W. Holdsworth, R. Moessner","submitted_at":"2012-04-03T04:40:27Z","abstract_excerpt":"Motivated by recent neutron scattering experiments, we derive and study an effective \"pseudo-dipolar\" spin-1/2 model for the XY pyrochlore antiferromagnet Er2Ti2O7. While a bond-dependent in-plane exchange anisotropy removes any continuous symmetry, it does lead to a one-parameter `accidental' classical degeneracy. This degeneracy is lifted by quantum fluctuations in favor of the non-coplanar spin structure observed experimentally -- a rare experimental instance of quantum order by disorder. A non-Goldstone low-energy mode is present in the excitation spectrum in accordance with inelastic neut"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.0595","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":""},"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":"2026-05-18T03:48:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XvJE1451E6rSiL+oO/TWJ0Mx0uVXtNyim6vsODL1Nvjw6u9K8FMwa5LDAlh4HemS4h093MKedBSXtnQIyE1/BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T22:32:06.141097Z"},"content_sha256":"123f781f8b7e80c29604f4b44085a738ad04d96b89f3ffcea857d4493d7078f9","schema_version":"1.0","event_id":"sha256:123f781f8b7e80c29604f4b44085a738ad04d96b89f3ffcea857d4493d7078f9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OTTYFWY5YB7XM53QP5CN5SVYL3/bundle.json","state_url":"https://pith.science/pith/OTTYFWY5YB7XM53QP5CN5SVYL3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OTTYFWY5YB7XM53QP5CN5SVYL3/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":"2026-05-28T22:32:06Z","links":{"resolver":"https://pith.science/pith/OTTYFWY5YB7XM53QP5CN5SVYL3","bundle":"https://pith.science/pith/OTTYFWY5YB7XM53QP5CN5SVYL3/bundle.json","state":"https://pith.science/pith/OTTYFWY5YB7XM53QP5CN5SVYL3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OTTYFWY5YB7XM53QP5CN5SVYL3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:OTTYFWY5YB7XM53QP5CN5SVYL3","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":"f10cf7fe0ab9f3ee256916531d4a716b907a330e431261f823f533a8811acbef","cross_cats_sorted":["cond-mat.stat-mech"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-04-03T04:40:27Z","title_canon_sha256":"844c6208c2a098c1b91372f08bd856c6632701ed1b17ee4d2be35e53cd594602"},"schema_version":"1.0","source":{"id":"1204.0595","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.0595","created_at":"2026-05-18T03:48:44Z"},{"alias_kind":"arxiv_version","alias_value":"1204.0595v2","created_at":"2026-05-18T03:48:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.0595","created_at":"2026-05-18T03:48:44Z"},{"alias_kind":"pith_short_12","alias_value":"OTTYFWY5YB7X","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"OTTYFWY5YB7XM53Q","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"OTTYFWY5","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:123f781f8b7e80c29604f4b44085a738ad04d96b89f3ffcea857d4493d7078f9","target":"graph","created_at":"2026-05-18T03:48:44Z","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":"Motivated by recent neutron scattering experiments, we derive and study an effective \"pseudo-dipolar\" spin-1/2 model for the XY pyrochlore antiferromagnet Er2Ti2O7. While a bond-dependent in-plane exchange anisotropy removes any continuous symmetry, it does lead to a one-parameter `accidental' classical degeneracy. This degeneracy is lifted by quantum fluctuations in favor of the non-coplanar spin structure observed experimentally -- a rare experimental instance of quantum order by disorder. A non-Goldstone low-energy mode is present in the excitation spectrum in accordance with inelastic neut","authors_text":"M. E. Zhitomirsky, M. V. Gvozdikova, P. C. W. Holdsworth, R. Moessner","cross_cats":["cond-mat.stat-mech"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-04-03T04:40:27Z","title":"Quantum order by disorder and accidental soft mode Er2Ti2O7"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.0595","kind":"arxiv","version":2},"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":"sha256:59a572cdd8b1898c808dd217027dade62041c2ae1f139d8207b3d938d739cf78","target":"record","created_at":"2026-05-18T03:48:44Z","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":"f10cf7fe0ab9f3ee256916531d4a716b907a330e431261f823f533a8811acbef","cross_cats_sorted":["cond-mat.stat-mech"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-04-03T04:40:27Z","title_canon_sha256":"844c6208c2a098c1b91372f08bd856c6632701ed1b17ee4d2be35e53cd594602"},"schema_version":"1.0","source":{"id":"1204.0595","kind":"arxiv","version":2}},"canonical_sha256":"74e782db1dc07f7677707f44decab85ef5039aba6b5ddc994a85e2e6ad3e72f2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"74e782db1dc07f7677707f44decab85ef5039aba6b5ddc994a85e2e6ad3e72f2","first_computed_at":"2026-05-18T03:48:44.920021Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:48:44.920021Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+HkhVRgO1rFsWpWCmJ5bjtjvPS35ULqHP5lwfMZUvprT5oshSTYSFLEV8g3SkTHJW4BWG34reRBskCtOJzAmBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:48:44.920582Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.0595","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:59a572cdd8b1898c808dd217027dade62041c2ae1f139d8207b3d938d739cf78","sha256:123f781f8b7e80c29604f4b44085a738ad04d96b89f3ffcea857d4493d7078f9"],"state_sha256":"977449b813152f08a5a6f32601e880c697e6fcadeaaaaea4fcf7fcdf83ed17ff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ULrTvEzNN8L7c0h2Gwz9XVmg9+R1+C0e7GFNvb9riEkO9BPzuyzJCYhWZM0La81avDmF9r10gyja+22zn7mQCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T22:32:06.144750Z","bundle_sha256":"c85541654be380416f868bfc2dffdb52bc81b828cfb5ff2f011719166df7513d"}}