{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:VJRK6YPNKAAP6HF2BP4VVC6GMU","short_pith_number":"pith:VJRK6YPN","canonical_record":{"source":{"id":"1601.06038","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-01-22T15:17:29Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"c8e840f7c4ac6fcc1dd5999036b1f495e250f90b90ffb9eacb215b1739abfc5a","abstract_canon_sha256":"a281622e490280ace1a7b6ce6fed35537b585b2e8e6a61a2639164d8897b2efe"},"schema_version":"1.0"},"canonical_sha256":"aa62af61ed5000ff1cba0bf95a8bc66526a52b7b720444e8ae1cc7b252775903","source":{"kind":"arxiv","id":"1601.06038","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06038","created_at":"2026-05-18T01:13:56Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06038v1","created_at":"2026-05-18T01:13:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06038","created_at":"2026-05-18T01:13:56Z"},{"alias_kind":"pith_short_12","alias_value":"VJRK6YPNKAAP","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VJRK6YPNKAAP6HF2","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VJRK6YPN","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:VJRK6YPNKAAP6HF2BP4VVC6GMU","target":"record","payload":{"canonical_record":{"source":{"id":"1601.06038","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-01-22T15:17:29Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"c8e840f7c4ac6fcc1dd5999036b1f495e250f90b90ffb9eacb215b1739abfc5a","abstract_canon_sha256":"a281622e490280ace1a7b6ce6fed35537b585b2e8e6a61a2639164d8897b2efe"},"schema_version":"1.0"},"canonical_sha256":"aa62af61ed5000ff1cba0bf95a8bc66526a52b7b720444e8ae1cc7b252775903","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:56.192306Z","signature_b64":"d4L7ZNz4TO2KwTpHb4Eqp0jn11PNdHOnQa077zWn1HTBaXDTGTg0dCyOsYaSec5DWCBK4zLebid81heh2vj9Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aa62af61ed5000ff1cba0bf95a8bc66526a52b7b720444e8ae1cc7b252775903","last_reissued_at":"2026-05-18T01:13:56.191814Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:56.191814Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.06038","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":"2026-05-18T01:13:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mAq8CJE4zRFJUdi8LJSZ7xH7c0Tw44TpOZNbkVO9O8e2RUq7NAfVZWhTyw1ghmJNPWVdW7n11k/4lDoTvl2PDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:08:12.109147Z"},"content_sha256":"1c0a55068a756386a8999b33f8a3771caa05ea33c12b7267f91ecc3b5decb5a5","schema_version":"1.0","event_id":"sha256:1c0a55068a756386a8999b33f8a3771caa05ea33c12b7267f91ecc3b5decb5a5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:VJRK6YPNKAAP6HF2BP4VVC6GMU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimizing Quantum Gas Production by an Evolutionary Algorithm","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"cond-mat.quant-gas","authors_text":"Artur Widera, Daniel Mayer, Farina Kindermann, Felix Schmidt, Michael Hohmann, Tobias Lausch","submitted_at":"2016-01-22T15:17:29Z","abstract_excerpt":"We report on the application of an evolutionary algorithm (EA) to enhance performance of an ultra-cold quantum gas experiment. The production of a $^{87}$Rubidium Bose-Einstein condensate (BEC) can be divided into fundamental cooling steps, specifically magneto optical trapping of cold atoms, loading of atoms to a far detuned crossed dipole trap and finally the process of evaporative cooling. The EA is applied separately for each of these steps with a particular definition for the feedback the so-called fitness. We discuss the principles of an EA and implement an enhancement called differentia"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06038","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":"2026-05-18T01:13:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6sctaV16AnPguhY9FvJvWmSGn6UBSEt5nu17Torikr+LfrVWUH0slCzNjUEw0C22PPjjnCvFWsxcqQwHp6qaDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:08:12.109571Z"},"content_sha256":"4c950c37e672482cd63a527173b851c1bbad5b3c74f2e735f5db1e259c7f4dff","schema_version":"1.0","event_id":"sha256:4c950c37e672482cd63a527173b851c1bbad5b3c74f2e735f5db1e259c7f4dff"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VJRK6YPNKAAP6HF2BP4VVC6GMU/bundle.json","state_url":"https://pith.science/pith/VJRK6YPNKAAP6HF2BP4VVC6GMU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VJRK6YPNKAAP6HF2BP4VVC6GMU/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":"2026-05-27T09:08:12Z","links":{"resolver":"https://pith.science/pith/VJRK6YPNKAAP6HF2BP4VVC6GMU","bundle":"https://pith.science/pith/VJRK6YPNKAAP6HF2BP4VVC6GMU/bundle.json","state":"https://pith.science/pith/VJRK6YPNKAAP6HF2BP4VVC6GMU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VJRK6YPNKAAP6HF2BP4VVC6GMU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:VJRK6YPNKAAP6HF2BP4VVC6GMU","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":"a281622e490280ace1a7b6ce6fed35537b585b2e8e6a61a2639164d8897b2efe","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-01-22T15:17:29Z","title_canon_sha256":"c8e840f7c4ac6fcc1dd5999036b1f495e250f90b90ffb9eacb215b1739abfc5a"},"schema_version":"1.0","source":{"id":"1601.06038","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06038","created_at":"2026-05-18T01:13:56Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06038v1","created_at":"2026-05-18T01:13:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06038","created_at":"2026-05-18T01:13:56Z"},{"alias_kind":"pith_short_12","alias_value":"VJRK6YPNKAAP","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VJRK6YPNKAAP6HF2","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VJRK6YPN","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:4c950c37e672482cd63a527173b851c1bbad5b3c74f2e735f5db1e259c7f4dff","target":"graph","created_at":"2026-05-18T01:13:56Z","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 report on the application of an evolutionary algorithm (EA) to enhance performance of an ultra-cold quantum gas experiment. The production of a $^{87}$Rubidium Bose-Einstein condensate (BEC) can be divided into fundamental cooling steps, specifically magneto optical trapping of cold atoms, loading of atoms to a far detuned crossed dipole trap and finally the process of evaporative cooling. The EA is applied separately for each of these steps with a particular definition for the feedback the so-called fitness. We discuss the principles of an EA and implement an enhancement called differentia","authors_text":"Artur Widera, Daniel Mayer, Farina Kindermann, Felix Schmidt, Michael Hohmann, Tobias Lausch","cross_cats":["physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-01-22T15:17:29Z","title":"Optimizing Quantum Gas Production by an Evolutionary Algorithm"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06038","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":"sha256:1c0a55068a756386a8999b33f8a3771caa05ea33c12b7267f91ecc3b5decb5a5","target":"record","created_at":"2026-05-18T01:13:56Z","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":"a281622e490280ace1a7b6ce6fed35537b585b2e8e6a61a2639164d8897b2efe","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-01-22T15:17:29Z","title_canon_sha256":"c8e840f7c4ac6fcc1dd5999036b1f495e250f90b90ffb9eacb215b1739abfc5a"},"schema_version":"1.0","source":{"id":"1601.06038","kind":"arxiv","version":1}},"canonical_sha256":"aa62af61ed5000ff1cba0bf95a8bc66526a52b7b720444e8ae1cc7b252775903","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aa62af61ed5000ff1cba0bf95a8bc66526a52b7b720444e8ae1cc7b252775903","first_computed_at":"2026-05-18T01:13:56.191814Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:13:56.191814Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d4L7ZNz4TO2KwTpHb4Eqp0jn11PNdHOnQa077zWn1HTBaXDTGTg0dCyOsYaSec5DWCBK4zLebid81heh2vj9Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T01:13:56.192306Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.06038","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c0a55068a756386a8999b33f8a3771caa05ea33c12b7267f91ecc3b5decb5a5","sha256:4c950c37e672482cd63a527173b851c1bbad5b3c74f2e735f5db1e259c7f4dff"],"state_sha256":"90b1f69a09855edc7865e21b0407538c944a02c884978f0ecda2f5965cdbba86"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S0nfCr6gDHz145MySiQet6S+jyM9oYfTntUn30gqlbzTm8WksQt3utb6ITgcugatDzNnIY4wsIe2Wu0p+OeeAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T09:08:12.112551Z","bundle_sha256":"2f76bdee3e8e93b79f122bcf3a7490d1a7d85336ef10cfa1a00018e28f05a2cd"}}