{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:CDSJHI2TZRGODEZUSLE4SNWS6B","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":"01092aecc5825aab08a9b45622fb4de6840a510cbc47ad144d83b5504f9e5ebe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2014-05-02T05:43:12Z","title_canon_sha256":"01d8f5e0ec9e06a68795a7f4baf54b973f5bbb70daa096e8e2bb1c83b4b6b33a"},"schema_version":"1.0","source":{"id":"1405.0347","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.0347","created_at":"2026-05-18T02:52:48Z"},{"alias_kind":"arxiv_version","alias_value":"1405.0347v1","created_at":"2026-05-18T02:52:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.0347","created_at":"2026-05-18T02:52:48Z"},{"alias_kind":"pith_short_12","alias_value":"CDSJHI2TZRGO","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_16","alias_value":"CDSJHI2TZRGODEZU","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_8","alias_value":"CDSJHI2T","created_at":"2026-05-18T12:28:22Z"}],"graph_snapshots":[{"event_id":"sha256:d21f4c834e5b92329fb50b858d083387b71ab925b5ff25536d03b1e169560694","target":"graph","created_at":"2026-05-18T02:52:48Z","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 generate spin currents in an $^{87}$Rb spin-2 Bose-Einstein condensate by application of a magnetic field gradient. The spin current destroys the spin polarization, leading to a sudden onset of two-body collisions. In addition, the spin coherence, as measured by the fringe contrast using Ramsey interferometry, is reduced drastically but experiences a weak revival due to in-trap oscillations. The spin current can be controlled using periodic $\\pi$ pulses (bang-bang control), producing longer spin coherence times. Our results show that spin coherence can be maintained even in the presence of ","authors_text":"Hiroki Saito, Mark Sadgrove, Sho Hasegawa, Takuya Hirano, Yujiro Eto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2014-05-02T05:43:12Z","title":"Control of spin current in a Bose gas by bang-bang pulses"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.0347","kind":"arxiv","version":1},"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":"sha256:440ff110cce72ee699b6f315d4368d4f886896e4e48adbf4af0c9524e6c0e9fe","target":"record","created_at":"2026-05-18T02:52:48Z","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":"01092aecc5825aab08a9b45622fb4de6840a510cbc47ad144d83b5504f9e5ebe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2014-05-02T05:43:12Z","title_canon_sha256":"01d8f5e0ec9e06a68795a7f4baf54b973f5bbb70daa096e8e2bb1c83b4b6b33a"},"schema_version":"1.0","source":{"id":"1405.0347","kind":"arxiv","version":1}},"canonical_sha256":"10e493a353cc4ce1933492c9c936d2f0556aa12684679e4e41991337b89fbe34","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"10e493a353cc4ce1933492c9c936d2f0556aa12684679e4e41991337b89fbe34","first_computed_at":"2026-05-18T02:52:48.165929Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:52:48.165929Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LowNgvt0CgNL0ixyD0ESNFvFnJ+eFY1xvytOhOvEO6feU7zKR/gFTkVlMZ8hSCQ5GMNR4qCtq2lBGGNg4OQtDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:52:48.166583Z","signed_message":"canonical_sha256_bytes"},"source_id":"1405.0347","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:440ff110cce72ee699b6f315d4368d4f886896e4e48adbf4af0c9524e6c0e9fe","sha256:d21f4c834e5b92329fb50b858d083387b71ab925b5ff25536d03b1e169560694"],"state_sha256":"e4c19bb7a670f274eb73a34fb6687f0d2748c823af9abce49ba54011066354ae"}