{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:QTWIADJEXRBPAOCL7IAWBRLYRJ","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":"1998b535b83505a33eeedb602eb9078e98a69d4543a512a4cb75f00802583c01","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-02-15T03:34:25Z","title_canon_sha256":"b5b416e45e2108c862a48dcbe53c63c534401acbf7bde3771cedd93056e3e33f"},"schema_version":"1.0","source":{"id":"1602.04555","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.04555","created_at":"2026-05-18T01:09:06Z"},{"alias_kind":"arxiv_version","alias_value":"1602.04555v2","created_at":"2026-05-18T01:09:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.04555","created_at":"2026-05-18T01:09:06Z"},{"alias_kind":"pith_short_12","alias_value":"QTWIADJEXRBP","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"QTWIADJEXRBPAOCL","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"QTWIADJE","created_at":"2026-05-18T12:30:41Z"}],"graph_snapshots":[{"event_id":"sha256:c969d2847247ebd40e302008ef35e5f586a1aa77dbfcc18f83c3d0d675e6ba4b","target":"graph","created_at":"2026-05-18T01:09:06Z","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 topological properties of elementary excitations in a staggered $p_x \\pm i p_y$ Bose-Einstein condensate realized in recent orbital optical lattice experiments. The condensate wave function may be viewed as a configuration space variant of the famous $p_x+ ip_y$ momentum space order parameter of strontium ruthenate superconductors. We show that its elementary excitation spectrum possesses Dirac bosons with $\\pi$ Berry flux. Remarkably, if we induce a population imbalance between the $p_x+ip_y$ and $p_x-ip_y$ condensate components, a gap opens up in the excitation spectrum resultin","authors_text":"Andreas Hemmerich, Li You, W. Vincent Liu, Zhi-Fang Xu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-02-15T03:34:25Z","title":"\\pi-flux Dirac bosons and topological edge excitations in a bosonic chiral p-wave superfluid"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.04555","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:b3f37984d215648e9160ed4e28fadc72d67caf488af18c6a788cf1652460cd3d","target":"record","created_at":"2026-05-18T01:09:06Z","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":"1998b535b83505a33eeedb602eb9078e98a69d4543a512a4cb75f00802583c01","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-02-15T03:34:25Z","title_canon_sha256":"b5b416e45e2108c862a48dcbe53c63c534401acbf7bde3771cedd93056e3e33f"},"schema_version":"1.0","source":{"id":"1602.04555","kind":"arxiv","version":2}},"canonical_sha256":"84ec800d24bc42f0384bfa0160c5788a7dff5aa6c2c5ad280c83f88be5814ed8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84ec800d24bc42f0384bfa0160c5788a7dff5aa6c2c5ad280c83f88be5814ed8","first_computed_at":"2026-05-18T01:09:06.711239Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:06.711239Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q99Rd6aVI5XEoHR6ZtP50TE5FHKCpcoi4WQE0+0Bdj8k+Sn3vjPc1e1sk5lLS2pSqWTFWvMZAFW4G62op/VeDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:06.711628Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.04555","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b3f37984d215648e9160ed4e28fadc72d67caf488af18c6a788cf1652460cd3d","sha256:c969d2847247ebd40e302008ef35e5f586a1aa77dbfcc18f83c3d0d675e6ba4b"],"state_sha256":"f594c6d3d17886d6faf4ccfbe3d00978836f64e7528dfb313e3aec5bcd4d720d"}