{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:I6FKUCR2MY4S3O7FVEMWOGXPTH","short_pith_number":"pith:I6FKUCR2","canonical_record":{"source":{"id":"1804.06108","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-04-17T08:45:49Z","cross_cats_sorted":[],"title_canon_sha256":"90799d09006767c9e658faa57f365c10fcf5fddb9fdd97f17567e84e893aa0c1","abstract_canon_sha256":"801e403b48e2f6c50fc90199e67c126cde640100ce4ecb490735928a64d307d1"},"schema_version":"1.0"},"canonical_sha256":"478aaa0a3a66392dbbe5a919671aef99d428bd2209dbd22653a55520d53732ca","source":{"kind":"arxiv","id":"1804.06108","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.06108","created_at":"2026-05-17T23:58:48Z"},{"alias_kind":"arxiv_version","alias_value":"1804.06108v3","created_at":"2026-05-17T23:58:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.06108","created_at":"2026-05-17T23:58:48Z"},{"alias_kind":"pith_short_12","alias_value":"I6FKUCR2MY4S","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"I6FKUCR2MY4S3O7F","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"I6FKUCR2","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:I6FKUCR2MY4S3O7FVEMWOGXPTH","target":"record","payload":{"canonical_record":{"source":{"id":"1804.06108","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-04-17T08:45:49Z","cross_cats_sorted":[],"title_canon_sha256":"90799d09006767c9e658faa57f365c10fcf5fddb9fdd97f17567e84e893aa0c1","abstract_canon_sha256":"801e403b48e2f6c50fc90199e67c126cde640100ce4ecb490735928a64d307d1"},"schema_version":"1.0"},"canonical_sha256":"478aaa0a3a66392dbbe5a919671aef99d428bd2209dbd22653a55520d53732ca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:58:48.096401Z","signature_b64":"vwMTjbIpwZfDCR1kUuwiv/ERO07T2G0uGkhLfWh9YmL29DOrVZ78iWoS/BRFRP4PexCKFEliSsfAhsrQ8FBTCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"478aaa0a3a66392dbbe5a919671aef99d428bd2209dbd22653a55520d53732ca","last_reissued_at":"2026-05-17T23:58:48.095999Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:58:48.095999Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.06108","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":"2026-05-17T23:58:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YL0elXmokbEedpEUreRKpzonL9NcpdJ8DbA747dovQKvn4EWiXQhDHm0EveKQ735n2bwzMd1jESwZaPzIKASAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T11:53:57.622381Z"},"content_sha256":"4a8d67920d073b9cae5f06c41b526c49889fc0e7add3a0e634b82d496f0dee21","schema_version":"1.0","event_id":"sha256:4a8d67920d073b9cae5f06c41b526c49889fc0e7add3a0e634b82d496f0dee21"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:I6FKUCR2MY4S3O7FVEMWOGXPTH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Random-Singlet Phase in Disordered Two-Dimensional Quantum Magnets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Anders W. Sandvik, Hui Shao, Lu Liu, Wenan Guo, Yu-Cheng Lin","submitted_at":"2018-04-17T08:45:49Z","abstract_excerpt":"We study effects of disorder (randomness) in a 2D square-lattice $S=1/2$ quantum spin system, the $J$-$Q$ model with a 6-spin interaction $Q$ supplementing the Heisenberg exchange $J$. In the absence of disorder the system hosts antiferromagnetic (AFM) and columnar valence-bond-solid (VBS) ground states. The VBS breaks $Z_4$ symmetry, and in the presence of arbitrarily weak disorder it forms domains. Using QMC simulations, we demonstrate two kinds of such disordered VBS states. Upon dilution, a removed site leaves a localized spin in the opposite sublattice. These spins form AFM order. For ran"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.06108","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":"2026-05-17T23:58:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ANHUUVpkqgJ1Nizl4WhgfcEG9BFEZyQ2yCAjPrn7+NODL/gFq3i9ELnttRUs4Is1CrdgXKd9IRZL+B5Ecib5AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T11:53:57.622818Z"},"content_sha256":"ed4b0e03f19d722f03ecf76eec33a578b749b7f9f444accf53ecab8cd6993a49","schema_version":"1.0","event_id":"sha256:ed4b0e03f19d722f03ecf76eec33a578b749b7f9f444accf53ecab8cd6993a49"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/I6FKUCR2MY4S3O7FVEMWOGXPTH/bundle.json","state_url":"https://pith.science/pith/I6FKUCR2MY4S3O7FVEMWOGXPTH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/I6FKUCR2MY4S3O7FVEMWOGXPTH/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":"2026-05-27T11:53:57Z","links":{"resolver":"https://pith.science/pith/I6FKUCR2MY4S3O7FVEMWOGXPTH","bundle":"https://pith.science/pith/I6FKUCR2MY4S3O7FVEMWOGXPTH/bundle.json","state":"https://pith.science/pith/I6FKUCR2MY4S3O7FVEMWOGXPTH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/I6FKUCR2MY4S3O7FVEMWOGXPTH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:I6FKUCR2MY4S3O7FVEMWOGXPTH","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":"801e403b48e2f6c50fc90199e67c126cde640100ce4ecb490735928a64d307d1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-04-17T08:45:49Z","title_canon_sha256":"90799d09006767c9e658faa57f365c10fcf5fddb9fdd97f17567e84e893aa0c1"},"schema_version":"1.0","source":{"id":"1804.06108","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.06108","created_at":"2026-05-17T23:58:48Z"},{"alias_kind":"arxiv_version","alias_value":"1804.06108v3","created_at":"2026-05-17T23:58:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.06108","created_at":"2026-05-17T23:58:48Z"},{"alias_kind":"pith_short_12","alias_value":"I6FKUCR2MY4S","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"I6FKUCR2MY4S3O7F","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"I6FKUCR2","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:ed4b0e03f19d722f03ecf76eec33a578b749b7f9f444accf53ecab8cd6993a49","target":"graph","created_at":"2026-05-17T23:58:48Z","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 effects of disorder (randomness) in a 2D square-lattice $S=1/2$ quantum spin system, the $J$-$Q$ model with a 6-spin interaction $Q$ supplementing the Heisenberg exchange $J$. In the absence of disorder the system hosts antiferromagnetic (AFM) and columnar valence-bond-solid (VBS) ground states. The VBS breaks $Z_4$ symmetry, and in the presence of arbitrarily weak disorder it forms domains. Using QMC simulations, we demonstrate two kinds of such disordered VBS states. Upon dilution, a removed site leaves a localized spin in the opposite sublattice. These spins form AFM order. For ran","authors_text":"Anders W. Sandvik, Hui Shao, Lu Liu, Wenan Guo, Yu-Cheng Lin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-04-17T08:45:49Z","title":"Random-Singlet Phase in Disordered Two-Dimensional Quantum Magnets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.06108","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":"sha256:4a8d67920d073b9cae5f06c41b526c49889fc0e7add3a0e634b82d496f0dee21","target":"record","created_at":"2026-05-17T23:58:48Z","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":"801e403b48e2f6c50fc90199e67c126cde640100ce4ecb490735928a64d307d1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-04-17T08:45:49Z","title_canon_sha256":"90799d09006767c9e658faa57f365c10fcf5fddb9fdd97f17567e84e893aa0c1"},"schema_version":"1.0","source":{"id":"1804.06108","kind":"arxiv","version":3}},"canonical_sha256":"478aaa0a3a66392dbbe5a919671aef99d428bd2209dbd22653a55520d53732ca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"478aaa0a3a66392dbbe5a919671aef99d428bd2209dbd22653a55520d53732ca","first_computed_at":"2026-05-17T23:58:48.095999Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:58:48.095999Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vwMTjbIpwZfDCR1kUuwiv/ERO07T2G0uGkhLfWh9YmL29DOrVZ78iWoS/BRFRP4PexCKFEliSsfAhsrQ8FBTCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:58:48.096401Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.06108","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4a8d67920d073b9cae5f06c41b526c49889fc0e7add3a0e634b82d496f0dee21","sha256:ed4b0e03f19d722f03ecf76eec33a578b749b7f9f444accf53ecab8cd6993a49"],"state_sha256":"fd94bcc7a708f7c52f0489d7cb9be42da8a48bc991d6a94d47ddd56251f8cf9b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YesDV1GAbFGrKVhrIpF5le9NyN5CHe+3o8sa5nN+sbSzATK8hAigAZxxC3o/zVRHViCYK4/lqCZflVzhM+zfCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T11:53:57.626555Z","bundle_sha256":"3f3141d8e4135278494026d89cfab29dd30dcc869d86b52c14fd947899170ded"}}