{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:A7U7K2CRENGH7QTIPO33ILE6JM","short_pith_number":"pith:A7U7K2CR","canonical_record":{"source":{"id":"1810.12229","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-10-29T16:16:26Z","cross_cats_sorted":[],"title_canon_sha256":"e1fa549ca58379103fda7e0726d69cee7b3a0a02aa038fd1b39389c22c426320","abstract_canon_sha256":"3d6fa277efb60b63399f46f6fe6e65eb1c9bee239b5786ec4f7001fb1ed894c7"},"schema_version":"1.0"},"canonical_sha256":"07e9f56851234c7fc2687bb7b42c9e4b0936e9c79af26fd6d43eb96b93ecc45d","source":{"kind":"arxiv","id":"1810.12229","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.12229","created_at":"2026-05-17T23:49:03Z"},{"alias_kind":"arxiv_version","alias_value":"1810.12229v2","created_at":"2026-05-17T23:49:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.12229","created_at":"2026-05-17T23:49:03Z"},{"alias_kind":"pith_short_12","alias_value":"A7U7K2CRENGH","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"A7U7K2CRENGH7QTI","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"A7U7K2CR","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:A7U7K2CRENGH7QTIPO33ILE6JM","target":"record","payload":{"canonical_record":{"source":{"id":"1810.12229","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-10-29T16:16:26Z","cross_cats_sorted":[],"title_canon_sha256":"e1fa549ca58379103fda7e0726d69cee7b3a0a02aa038fd1b39389c22c426320","abstract_canon_sha256":"3d6fa277efb60b63399f46f6fe6e65eb1c9bee239b5786ec4f7001fb1ed894c7"},"schema_version":"1.0"},"canonical_sha256":"07e9f56851234c7fc2687bb7b42c9e4b0936e9c79af26fd6d43eb96b93ecc45d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:03.153580Z","signature_b64":"pTEeqfpOR+sol2QW7UPCPIkRMQDfvBbSQNUZBu4iUWma65RKWit9x5Xxkg7ZIliaOL+MY6TZuMLj2mQHotH4BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"07e9f56851234c7fc2687bb7b42c9e4b0936e9c79af26fd6d43eb96b93ecc45d","last_reissued_at":"2026-05-17T23:49:03.153049Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:03.153049Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.12229","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":"2026-05-17T23:49:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rJ+Bj+1jzWH/Yhea16sABJPDdNuRmjXGgilHHn/iWRgvcrXFhQsl8u33SMTksHEB5WUpKfzRQhPBbyM7KywrBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T00:24:56.835139Z"},"content_sha256":"eaddb77b7f6facd7de9b7f4f86440081d1124b910148040e7d591675efd68f9b","schema_version":"1.0","event_id":"sha256:eaddb77b7f6facd7de9b7f4f86440081d1124b910148040e7d591675efd68f9b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:A7U7K2CRENGH7QTIPO33ILE6JM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Supersolid behaviour of a dipolar Bose-Einstein condensate confined in a tube","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.quant-gas","authors_text":"Francesco Ancilotto, Santo Maria Roccuzzo","submitted_at":"2018-10-29T16:16:26Z","abstract_excerpt":"Motivated by a recent experiment [L.Chomaz et al., Nature Physics 14, 442 (2018)], we perform numerical simulations of a dipolar Bose-Einstein Condensate (BEC) in a tubular confinement at T=0 within Density Functional Theory, where the beyond-mean-field correction to the ground state energy is included in the Local Density Approximation. We study the excitation spectrum of the system by solving the corresponding Bogoliubov-de Gennes equations. The calculated spectrum shows a roton minimum, and the roton gap decreases by reducing the effective scattering length. As the roton gap disappears, the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.12229","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":"2026-05-17T23:49:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0JNYcOaxryMM6giYXL8ZRFdR3Aszj7OINd+NJ3ZWqWWCeX8Ez2Jpzool9IWRKxHbkr5F7Agjr6ycqMFymnTZBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T00:24:56.835854Z"},"content_sha256":"45ddc771e32268e0a437d764ff7908fa6168ba3f42720b33e8329cfb0b37fb23","schema_version":"1.0","event_id":"sha256:45ddc771e32268e0a437d764ff7908fa6168ba3f42720b33e8329cfb0b37fb23"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A7U7K2CRENGH7QTIPO33ILE6JM/bundle.json","state_url":"https://pith.science/pith/A7U7K2CRENGH7QTIPO33ILE6JM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A7U7K2CRENGH7QTIPO33ILE6JM/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":"2026-05-27T00:24:56Z","links":{"resolver":"https://pith.science/pith/A7U7K2CRENGH7QTIPO33ILE6JM","bundle":"https://pith.science/pith/A7U7K2CRENGH7QTIPO33ILE6JM/bundle.json","state":"https://pith.science/pith/A7U7K2CRENGH7QTIPO33ILE6JM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A7U7K2CRENGH7QTIPO33ILE6JM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:A7U7K2CRENGH7QTIPO33ILE6JM","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":"3d6fa277efb60b63399f46f6fe6e65eb1c9bee239b5786ec4f7001fb1ed894c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-10-29T16:16:26Z","title_canon_sha256":"e1fa549ca58379103fda7e0726d69cee7b3a0a02aa038fd1b39389c22c426320"},"schema_version":"1.0","source":{"id":"1810.12229","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.12229","created_at":"2026-05-17T23:49:03Z"},{"alias_kind":"arxiv_version","alias_value":"1810.12229v2","created_at":"2026-05-17T23:49:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.12229","created_at":"2026-05-17T23:49:03Z"},{"alias_kind":"pith_short_12","alias_value":"A7U7K2CRENGH","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"A7U7K2CRENGH7QTI","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"A7U7K2CR","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:45ddc771e32268e0a437d764ff7908fa6168ba3f42720b33e8329cfb0b37fb23","target":"graph","created_at":"2026-05-17T23:49:03Z","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 a recent experiment [L.Chomaz et al., Nature Physics 14, 442 (2018)], we perform numerical simulations of a dipolar Bose-Einstein Condensate (BEC) in a tubular confinement at T=0 within Density Functional Theory, where the beyond-mean-field correction to the ground state energy is included in the Local Density Approximation. We study the excitation spectrum of the system by solving the corresponding Bogoliubov-de Gennes equations. The calculated spectrum shows a roton minimum, and the roton gap decreases by reducing the effective scattering length. As the roton gap disappears, the","authors_text":"Francesco Ancilotto, Santo Maria Roccuzzo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-10-29T16:16:26Z","title":"Supersolid behaviour of a dipolar Bose-Einstein condensate confined in a tube"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.12229","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:eaddb77b7f6facd7de9b7f4f86440081d1124b910148040e7d591675efd68f9b","target":"record","created_at":"2026-05-17T23:49:03Z","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":"3d6fa277efb60b63399f46f6fe6e65eb1c9bee239b5786ec4f7001fb1ed894c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-10-29T16:16:26Z","title_canon_sha256":"e1fa549ca58379103fda7e0726d69cee7b3a0a02aa038fd1b39389c22c426320"},"schema_version":"1.0","source":{"id":"1810.12229","kind":"arxiv","version":2}},"canonical_sha256":"07e9f56851234c7fc2687bb7b42c9e4b0936e9c79af26fd6d43eb96b93ecc45d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"07e9f56851234c7fc2687bb7b42c9e4b0936e9c79af26fd6d43eb96b93ecc45d","first_computed_at":"2026-05-17T23:49:03.153049Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:03.153049Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pTEeqfpOR+sol2QW7UPCPIkRMQDfvBbSQNUZBu4iUWma65RKWit9x5Xxkg7ZIliaOL+MY6TZuMLj2mQHotH4BQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:03.153580Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.12229","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eaddb77b7f6facd7de9b7f4f86440081d1124b910148040e7d591675efd68f9b","sha256:45ddc771e32268e0a437d764ff7908fa6168ba3f42720b33e8329cfb0b37fb23"],"state_sha256":"0b08837b2e78d724b0e5cd3423159e0401be4d1876d7de849b15df61f80d37f1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O2ZEaCDnnOb467VTGzPHN2XBdiucAVsjoI2QR8nLJ9FpYVitUW0gSjh3PGWwLXALBX8IJnr8uThzdEzJ1ll9Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T00:24:56.839611Z","bundle_sha256":"c4496aa4a732a2fed4587b88a602dd855494bb207e2e6b58ea14faf423a8bdf8"}}