{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:DDCQLA2AM4AMLJQ4IYQRAM6J7Z","short_pith_number":"pith:DDCQLA2A","canonical_record":{"source":{"id":"1009.0587","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-09-03T05:18:14Z","cross_cats_sorted":["cond-mat.quant-gas"],"title_canon_sha256":"7820b57312c43c07b0c405cfa1bae0a8315830c8a8afca7fffa564b2c1f4344c","abstract_canon_sha256":"626ee2dcd805d07559df11a24c39722070cc34b695fb1829b834348f7ad4ba57"},"schema_version":"1.0"},"canonical_sha256":"18c50583406700c5a61c46211033c9fe4fd68f191bcc66815a5ed5bbcea636c7","source":{"kind":"arxiv","id":"1009.0587","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.0587","created_at":"2026-05-18T03:33:48Z"},{"alias_kind":"arxiv_version","alias_value":"1009.0587v1","created_at":"2026-05-18T03:33:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.0587","created_at":"2026-05-18T03:33:48Z"},{"alias_kind":"pith_short_12","alias_value":"DDCQLA2AM4AM","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"DDCQLA2AM4AMLJQ4","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"DDCQLA2A","created_at":"2026-05-18T12:26:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:DDCQLA2AM4AMLJQ4IYQRAM6J7Z","target":"record","payload":{"canonical_record":{"source":{"id":"1009.0587","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-09-03T05:18:14Z","cross_cats_sorted":["cond-mat.quant-gas"],"title_canon_sha256":"7820b57312c43c07b0c405cfa1bae0a8315830c8a8afca7fffa564b2c1f4344c","abstract_canon_sha256":"626ee2dcd805d07559df11a24c39722070cc34b695fb1829b834348f7ad4ba57"},"schema_version":"1.0"},"canonical_sha256":"18c50583406700c5a61c46211033c9fe4fd68f191bcc66815a5ed5bbcea636c7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:33:48.247872Z","signature_b64":"CZXKfTAZn04j8IXVon3/PVHHfFPuJXEH0fg6tjQjvUAbydlgUgoJfCdLyEtMCNFoRYUHe6XMDh+Nqdm4gRvfAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"18c50583406700c5a61c46211033c9fe4fd68f191bcc66815a5ed5bbcea636c7","last_reissued_at":"2026-05-18T03:33:48.247143Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:33:48.247143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1009.0587","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":"2026-05-18T03:33:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QqlLaHUpcY3sA8HEN8XhEtdcCCBS7EW3j28BtDz7rXh1DAfwvwI7iWokG5mYTb9RN7ZzyeN+SgQvIcfL5bEzBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:04:53.919131Z"},"content_sha256":"7f73e1a206cc99e9185ad3ad79374faa2061114f3e742cf2d139ee218d222813","schema_version":"1.0","event_id":"sha256:7f73e1a206cc99e9185ad3ad79374faa2061114f3e742cf2d139ee218d222813"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:DDCQLA2AM4AMLJQ4IYQRAM6J7Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Feedback control of an interacting Bose-Einstein condensate using phase-contrast imaging","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.quant-gas"],"primary_cat":"physics.atom-ph","authors_text":"Andre R. R. Carvalho, Joseph J. Hope, Michael R. Hush, Stuart S. Szigeti","submitted_at":"2010-09-03T05:18:14Z","abstract_excerpt":"The linewidth of an atom laser is limited by density fluctuations in the Bose-Einstein condensate (BEC) from which the atom laser beam is outcoupled. In this paper we show that a stable spatial mode for an interacting BEC can be generated using a realistic control scheme that includes the effects of the measurement backaction. This model extends the feedback theory, based on a phase-contrast imaging setup, presented in \\cite{Szigeti:2009}. In particular, it is applicable to a BEC with large interatomic interactions and solves the problem of inadequacy of the mean-field (coherent state) approxi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.0587","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":"2026-05-18T03:33:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vvLK4yH6F4JvJ5uRuVh6Jm0rmODHTMx6/XIeVG+zdksGYGHlRZTucTZjirR5/guBJ/SuR1qHsNQbgPmPXHwUCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:04:53.919848Z"},"content_sha256":"b52c0ccdd54c5fa1c3cfb81e3978f165774a363672fc66f4e648c79a4ae653a4","schema_version":"1.0","event_id":"sha256:b52c0ccdd54c5fa1c3cfb81e3978f165774a363672fc66f4e648c79a4ae653a4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DDCQLA2AM4AMLJQ4IYQRAM6J7Z/bundle.json","state_url":"https://pith.science/pith/DDCQLA2AM4AMLJQ4IYQRAM6J7Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DDCQLA2AM4AMLJQ4IYQRAM6J7Z/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":"2026-05-25T23:04:53Z","links":{"resolver":"https://pith.science/pith/DDCQLA2AM4AMLJQ4IYQRAM6J7Z","bundle":"https://pith.science/pith/DDCQLA2AM4AMLJQ4IYQRAM6J7Z/bundle.json","state":"https://pith.science/pith/DDCQLA2AM4AMLJQ4IYQRAM6J7Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DDCQLA2AM4AMLJQ4IYQRAM6J7Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:DDCQLA2AM4AMLJQ4IYQRAM6J7Z","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":"626ee2dcd805d07559df11a24c39722070cc34b695fb1829b834348f7ad4ba57","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-09-03T05:18:14Z","title_canon_sha256":"7820b57312c43c07b0c405cfa1bae0a8315830c8a8afca7fffa564b2c1f4344c"},"schema_version":"1.0","source":{"id":"1009.0587","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.0587","created_at":"2026-05-18T03:33:48Z"},{"alias_kind":"arxiv_version","alias_value":"1009.0587v1","created_at":"2026-05-18T03:33:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.0587","created_at":"2026-05-18T03:33:48Z"},{"alias_kind":"pith_short_12","alias_value":"DDCQLA2AM4AM","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"DDCQLA2AM4AMLJQ4","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"DDCQLA2A","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:b52c0ccdd54c5fa1c3cfb81e3978f165774a363672fc66f4e648c79a4ae653a4","target":"graph","created_at":"2026-05-18T03:33:48Z","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":"The linewidth of an atom laser is limited by density fluctuations in the Bose-Einstein condensate (BEC) from which the atom laser beam is outcoupled. In this paper we show that a stable spatial mode for an interacting BEC can be generated using a realistic control scheme that includes the effects of the measurement backaction. This model extends the feedback theory, based on a phase-contrast imaging setup, presented in \\cite{Szigeti:2009}. In particular, it is applicable to a BEC with large interatomic interactions and solves the problem of inadequacy of the mean-field (coherent state) approxi","authors_text":"Andre R. R. Carvalho, Joseph J. Hope, Michael R. Hush, Stuart S. Szigeti","cross_cats":["cond-mat.quant-gas"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-09-03T05:18:14Z","title":"Feedback control of an interacting Bose-Einstein condensate using phase-contrast imaging"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.0587","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":"sha256:7f73e1a206cc99e9185ad3ad79374faa2061114f3e742cf2d139ee218d222813","target":"record","created_at":"2026-05-18T03:33:48Z","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":"626ee2dcd805d07559df11a24c39722070cc34b695fb1829b834348f7ad4ba57","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-09-03T05:18:14Z","title_canon_sha256":"7820b57312c43c07b0c405cfa1bae0a8315830c8a8afca7fffa564b2c1f4344c"},"schema_version":"1.0","source":{"id":"1009.0587","kind":"arxiv","version":1}},"canonical_sha256":"18c50583406700c5a61c46211033c9fe4fd68f191bcc66815a5ed5bbcea636c7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"18c50583406700c5a61c46211033c9fe4fd68f191bcc66815a5ed5bbcea636c7","first_computed_at":"2026-05-18T03:33:48.247143Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:33:48.247143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CZXKfTAZn04j8IXVon3/PVHHfFPuJXEH0fg6tjQjvUAbydlgUgoJfCdLyEtMCNFoRYUHe6XMDh+Nqdm4gRvfAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:33:48.247872Z","signed_message":"canonical_sha256_bytes"},"source_id":"1009.0587","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7f73e1a206cc99e9185ad3ad79374faa2061114f3e742cf2d139ee218d222813","sha256:b52c0ccdd54c5fa1c3cfb81e3978f165774a363672fc66f4e648c79a4ae653a4"],"state_sha256":"d6e04958060540dd86ec50faf45d4aa2203b69b1df0c780775f15a3f7dfae877"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wQzsjHxkqdYVVexg+fVjc4KY6NobWHhs6EIEI4DWaCQaHbJEVsDDQtJTwdlyZbnQMtKCr6PbrzL0VaQRoVN5Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T23:04:53.923887Z","bundle_sha256":"b7a0d0827669ed688f5d3617f0b0a7d7ac01deb64cdd760d1ab3b47179fb4ba8"}}