{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:S43GTWONBJAF5VWS446XEI5MXR","short_pith_number":"pith:S43GTWON","canonical_record":{"source":{"id":"1501.01362","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-01-07T03:53:04Z","cross_cats_sorted":[],"title_canon_sha256":"242a3e5e4b9f9519e419383ac2d36be87110859eeeb525b2e49dbb1a194ed73c","abstract_canon_sha256":"d4a270ac5cb73590accf84a199345ab7621063d443469148b5ab4efbe0e61cb3"},"schema_version":"1.0"},"canonical_sha256":"973669d9cd0a405ed6d2e73d7223acbc6a07790db64b04da0b16def98639a488","source":{"kind":"arxiv","id":"1501.01362","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.01362","created_at":"2026-05-18T02:25:55Z"},{"alias_kind":"arxiv_version","alias_value":"1501.01362v1","created_at":"2026-05-18T02:25:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.01362","created_at":"2026-05-18T02:25:55Z"},{"alias_kind":"pith_short_12","alias_value":"S43GTWONBJAF","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"S43GTWONBJAF5VWS","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"S43GTWON","created_at":"2026-05-18T12:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:S43GTWONBJAF5VWS446XEI5MXR","target":"record","payload":{"canonical_record":{"source":{"id":"1501.01362","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-01-07T03:53:04Z","cross_cats_sorted":[],"title_canon_sha256":"242a3e5e4b9f9519e419383ac2d36be87110859eeeb525b2e49dbb1a194ed73c","abstract_canon_sha256":"d4a270ac5cb73590accf84a199345ab7621063d443469148b5ab4efbe0e61cb3"},"schema_version":"1.0"},"canonical_sha256":"973669d9cd0a405ed6d2e73d7223acbc6a07790db64b04da0b16def98639a488","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:25:55.615450Z","signature_b64":"76zsXBBEmiLjr8PXlXZYlRtVrsOUNY3qR0eiYK3AiDhPbO88f22iv+4zRErlFvAzIu4lbssjf9vUwy25vTZNCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"973669d9cd0a405ed6d2e73d7223acbc6a07790db64b04da0b16def98639a488","last_reissued_at":"2026-05-18T02:25:55.615020Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:25:55.615020Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.01362","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:25:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wQJwyshMpxhDaZfkGB2h9c2EhR6z7w/SjLjOihBpzxBGA3piezQZdWaQIcG55AjVk+XLaubMehQuZCas2zF8Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:38:05.320973Z"},"content_sha256":"97435f148ef4598184fc2a9832444321a07e4a3e3dfa0c82e73dceb6f811d9e9","schema_version":"1.0","event_id":"sha256:97435f148ef4598184fc2a9832444321a07e4a3e3dfa0c82e73dceb6f811d9e9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:S43GTWONBJAF5VWS446XEI5MXR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Superfluidity of pure spin current in ultracold Bose gases","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.quant-gas","authors_text":"Biao Wu, Qing-Feng Sun, Qizhong Zhu","submitted_at":"2015-01-07T03:53:04Z","abstract_excerpt":"We study the superfluidity of a pure spin current that is a spin current without mass current. We examine two types of pure spin currents, planar and circular, in spin-1 Bose gas. For the planar current, it is usually unstable, but can be stabilized by the quadratic Zeeman effect. The circular current can be generated with spin-orbit coupling. When the spin-orbit coupling strength is weak, we find that the circular pure spin current is the ground state of the system and thus a super-flow. We discuss the experimental schemes to realize and detect a pure spin current."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.01362","kind":"arxiv","version":1},"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":"2026-05-18T02:25:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ofAYtKVQ2iQ/ALvunCtWRfBceV7MAaYohQtdszjI325EqNHqX92rSrS2JNiamkJJ5SiZXGEemS2DtaaApdSfCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:38:05.321312Z"},"content_sha256":"ffacee57d2c3a6d478c3a7fb5d8182f2eeacafb779d9473a97f7bb3ee89bee7d","schema_version":"1.0","event_id":"sha256:ffacee57d2c3a6d478c3a7fb5d8182f2eeacafb779d9473a97f7bb3ee89bee7d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/S43GTWONBJAF5VWS446XEI5MXR/bundle.json","state_url":"https://pith.science/pith/S43GTWONBJAF5VWS446XEI5MXR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/S43GTWONBJAF5VWS446XEI5MXR/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":"2026-06-02T18:38:05Z","links":{"resolver":"https://pith.science/pith/S43GTWONBJAF5VWS446XEI5MXR","bundle":"https://pith.science/pith/S43GTWONBJAF5VWS446XEI5MXR/bundle.json","state":"https://pith.science/pith/S43GTWONBJAF5VWS446XEI5MXR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/S43GTWONBJAF5VWS446XEI5MXR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:S43GTWONBJAF5VWS446XEI5MXR","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":"d4a270ac5cb73590accf84a199345ab7621063d443469148b5ab4efbe0e61cb3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-01-07T03:53:04Z","title_canon_sha256":"242a3e5e4b9f9519e419383ac2d36be87110859eeeb525b2e49dbb1a194ed73c"},"schema_version":"1.0","source":{"id":"1501.01362","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.01362","created_at":"2026-05-18T02:25:55Z"},{"alias_kind":"arxiv_version","alias_value":"1501.01362v1","created_at":"2026-05-18T02:25:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.01362","created_at":"2026-05-18T02:25:55Z"},{"alias_kind":"pith_short_12","alias_value":"S43GTWONBJAF","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"S43GTWONBJAF5VWS","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"S43GTWON","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:ffacee57d2c3a6d478c3a7fb5d8182f2eeacafb779d9473a97f7bb3ee89bee7d","target":"graph","created_at":"2026-05-18T02:25:55Z","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 superfluidity of a pure spin current that is a spin current without mass current. We examine two types of pure spin currents, planar and circular, in spin-1 Bose gas. For the planar current, it is usually unstable, but can be stabilized by the quadratic Zeeman effect. The circular current can be generated with spin-orbit coupling. When the spin-orbit coupling strength is weak, we find that the circular pure spin current is the ground state of the system and thus a super-flow. We discuss the experimental schemes to realize and detect a pure spin current.","authors_text":"Biao Wu, Qing-Feng Sun, Qizhong Zhu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-01-07T03:53:04Z","title":"Superfluidity of pure spin current in ultracold Bose gases"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.01362","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":"sha256:97435f148ef4598184fc2a9832444321a07e4a3e3dfa0c82e73dceb6f811d9e9","target":"record","created_at":"2026-05-18T02:25:55Z","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":"d4a270ac5cb73590accf84a199345ab7621063d443469148b5ab4efbe0e61cb3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-01-07T03:53:04Z","title_canon_sha256":"242a3e5e4b9f9519e419383ac2d36be87110859eeeb525b2e49dbb1a194ed73c"},"schema_version":"1.0","source":{"id":"1501.01362","kind":"arxiv","version":1}},"canonical_sha256":"973669d9cd0a405ed6d2e73d7223acbc6a07790db64b04da0b16def98639a488","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"973669d9cd0a405ed6d2e73d7223acbc6a07790db64b04da0b16def98639a488","first_computed_at":"2026-05-18T02:25:55.615020Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:25:55.615020Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"76zsXBBEmiLjr8PXlXZYlRtVrsOUNY3qR0eiYK3AiDhPbO88f22iv+4zRErlFvAzIu4lbssjf9vUwy25vTZNCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:25:55.615450Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.01362","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:97435f148ef4598184fc2a9832444321a07e4a3e3dfa0c82e73dceb6f811d9e9","sha256:ffacee57d2c3a6d478c3a7fb5d8182f2eeacafb779d9473a97f7bb3ee89bee7d"],"state_sha256":"8c2246990fd7082bf3f765ce58eb22da4ef72223ea0b6d56c0f2060b968dca17"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nzve29W5JnQihgIGnqHpAPKMxRT3XCJlHbwEpNZ1nDmET+xxETzgM1QuEKByATODMNhMMpn7C2hJVIMAG9YSAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T18:38:05.323224Z","bundle_sha256":"523f06511f348df30e7d71b1894927c423ec15353d00793e80783c7ef32dd812"}}