{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:BNHYQBZI4Q2GH63LIHKECB5KW5","short_pith_number":"pith:BNHYQBZI","canonical_record":{"source":{"id":"1811.12835","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-11-30T15:05:29Z","cross_cats_sorted":[],"title_canon_sha256":"2c1c0d6b73805dcb2c3446a4b8982694d4da673e6ace32dc1f31a2ac1587a129","abstract_canon_sha256":"31ce849d5125cb8bbfa5779a386b82d5cd9a95bdf86d7ea0e8a25a5a0d3e69ed"},"schema_version":"1.0"},"canonical_sha256":"0b4f880728e43463fb6b41d44107aab7551d110fdacdacc0207826b57a02f7ba","source":{"kind":"arxiv","id":"1811.12835","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.12835","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"arxiv_version","alias_value":"1811.12835v1","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.12835","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"pith_short_12","alias_value":"BNHYQBZI4Q2G","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BNHYQBZI4Q2GH63L","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BNHYQBZI","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:BNHYQBZI4Q2GH63LIHKECB5KW5","target":"record","payload":{"canonical_record":{"source":{"id":"1811.12835","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-11-30T15:05:29Z","cross_cats_sorted":[],"title_canon_sha256":"2c1c0d6b73805dcb2c3446a4b8982694d4da673e6ace32dc1f31a2ac1587a129","abstract_canon_sha256":"31ce849d5125cb8bbfa5779a386b82d5cd9a95bdf86d7ea0e8a25a5a0d3e69ed"},"schema_version":"1.0"},"canonical_sha256":"0b4f880728e43463fb6b41d44107aab7551d110fdacdacc0207826b57a02f7ba","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:42.803922Z","signature_b64":"SaSzq3V0cNdWLwbDqxyBO5FxF+K7BimfOt6xr1GeWH0CHv/oCZMPQPsJs7IRpdqAQowWLCatUNlmVOk6SzmbCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b4f880728e43463fb6b41d44107aab7551d110fdacdacc0207826b57a02f7ba","last_reissued_at":"2026-05-17T23:54:42.803261Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:42.803261Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.12835","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":"2026-05-17T23:54:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rCL8kXp6GBXek6s882sd+vg7xNbQJN7gi51heeUmSVWi6HBmIdNybDb3D7AS74e4eHP87r8BgbpGwso6rzB/Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T15:03:12.165343Z"},"content_sha256":"4ec01db437aaa4357ec18a8b61782f7c2d000f2e4afc32049e34dd87f599a59f","schema_version":"1.0","event_id":"sha256:4ec01db437aaa4357ec18a8b61782f7c2d000f2e4afc32049e34dd87f599a59f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:BNHYQBZI4Q2GH63LIHKECB5KW5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dynamics of a Space-Time Crystal in an Atomic Bose-Einstein Condensate","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.quant-gas","authors_text":"Henk Stoof, Jasper Smits, Lei Liao, Peter van der Straten","submitted_at":"2018-11-30T15:05:29Z","abstract_excerpt":"A space-time crystal has recently been observed in a superfluid Bose gas. Here we construct a variational model that allows us to describe from first principles the coupling between the radial breathing mode and the higher-order axial modes that underlies the observation of the space-time crystal. By comparing with numerical simulations we verify the validity of our variational Ansatz. From the model we determine the requirements for the observation of the space-time crystal and the Ising-like nature of the symmetry breaking involved. Also, we find the onset and growth rate of the space-time c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.12835","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":"2026-05-17T23:54:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MjV39u4QDRIoqXybf1q3/yUedUvaCPPlzrsSciSCJPgcgpdRECZFQqBMSxpnHbhsMZ5nYrIPXJBy29hGLQMeCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T15:03:12.166079Z"},"content_sha256":"b3f9b7ffd53d7267045980f0ef249c3411948c9a37cf351c90f1367091726829","schema_version":"1.0","event_id":"sha256:b3f9b7ffd53d7267045980f0ef249c3411948c9a37cf351c90f1367091726829"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BNHYQBZI4Q2GH63LIHKECB5KW5/bundle.json","state_url":"https://pith.science/pith/BNHYQBZI4Q2GH63LIHKECB5KW5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BNHYQBZI4Q2GH63LIHKECB5KW5/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":"2026-06-11T15:03:12Z","links":{"resolver":"https://pith.science/pith/BNHYQBZI4Q2GH63LIHKECB5KW5","bundle":"https://pith.science/pith/BNHYQBZI4Q2GH63LIHKECB5KW5/bundle.json","state":"https://pith.science/pith/BNHYQBZI4Q2GH63LIHKECB5KW5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BNHYQBZI4Q2GH63LIHKECB5KW5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BNHYQBZI4Q2GH63LIHKECB5KW5","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":"31ce849d5125cb8bbfa5779a386b82d5cd9a95bdf86d7ea0e8a25a5a0d3e69ed","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-11-30T15:05:29Z","title_canon_sha256":"2c1c0d6b73805dcb2c3446a4b8982694d4da673e6ace32dc1f31a2ac1587a129"},"schema_version":"1.0","source":{"id":"1811.12835","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.12835","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"arxiv_version","alias_value":"1811.12835v1","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.12835","created_at":"2026-05-17T23:54:42Z"},{"alias_kind":"pith_short_12","alias_value":"BNHYQBZI4Q2G","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BNHYQBZI4Q2GH63L","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BNHYQBZI","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:b3f9b7ffd53d7267045980f0ef249c3411948c9a37cf351c90f1367091726829","target":"graph","created_at":"2026-05-17T23:54:42Z","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":"A space-time crystal has recently been observed in a superfluid Bose gas. Here we construct a variational model that allows us to describe from first principles the coupling between the radial breathing mode and the higher-order axial modes that underlies the observation of the space-time crystal. By comparing with numerical simulations we verify the validity of our variational Ansatz. From the model we determine the requirements for the observation of the space-time crystal and the Ising-like nature of the symmetry breaking involved. Also, we find the onset and growth rate of the space-time c","authors_text":"Henk Stoof, Jasper Smits, Lei Liao, Peter van der Straten","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-11-30T15:05:29Z","title":"Dynamics of a Space-Time Crystal in an Atomic Bose-Einstein Condensate"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.12835","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":"sha256:4ec01db437aaa4357ec18a8b61782f7c2d000f2e4afc32049e34dd87f599a59f","target":"record","created_at":"2026-05-17T23:54:42Z","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":"31ce849d5125cb8bbfa5779a386b82d5cd9a95bdf86d7ea0e8a25a5a0d3e69ed","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-11-30T15:05:29Z","title_canon_sha256":"2c1c0d6b73805dcb2c3446a4b8982694d4da673e6ace32dc1f31a2ac1587a129"},"schema_version":"1.0","source":{"id":"1811.12835","kind":"arxiv","version":1}},"canonical_sha256":"0b4f880728e43463fb6b41d44107aab7551d110fdacdacc0207826b57a02f7ba","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0b4f880728e43463fb6b41d44107aab7551d110fdacdacc0207826b57a02f7ba","first_computed_at":"2026-05-17T23:54:42.803261Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:42.803261Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SaSzq3V0cNdWLwbDqxyBO5FxF+K7BimfOt6xr1GeWH0CHv/oCZMPQPsJs7IRpdqAQowWLCatUNlmVOk6SzmbCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:42.803922Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.12835","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ec01db437aaa4357ec18a8b61782f7c2d000f2e4afc32049e34dd87f599a59f","sha256:b3f9b7ffd53d7267045980f0ef249c3411948c9a37cf351c90f1367091726829"],"state_sha256":"ed9d0c856180dfc4282899e7c4b53b44da1cab74e0ab1e1494949d9ab306faf4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z1lV2FuvMcEi5jNlbpvF8W81m9R9t3pekS9/wSEDVR3qXKuMwJAcZwLWrn7taNJEDCUW62NdA2YatXAcmk7yCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T15:03:12.170350Z","bundle_sha256":"fa1c5a9fdbeb9361a63c9ba3289dfa3cfe76dabf0a7f39a35077673e89c9b187"}}