{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:SP3KBYWNXAE2Y5VGLVOUE3UUAN","short_pith_number":"pith:SP3KBYWN","canonical_record":{"source":{"id":"1004.2887","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2010-04-16T17:07:43Z","cross_cats_sorted":[],"title_canon_sha256":"8c9c161972f40b97fe012713c255337b7c9a9da7e09aef92dcad3c53fd3cfc22","abstract_canon_sha256":"bec59683839fe43adb5639f01a885b7d9b61e539b497d0ead4e84af11a35fee8"},"schema_version":"1.0"},"canonical_sha256":"93f6a0e2cdb809ac76a65d5d426e940368a7f2dd9c83ebf34a38c07bd9d2565f","source":{"kind":"arxiv","id":"1004.2887","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.2887","created_at":"2026-05-18T04:42:23Z"},{"alias_kind":"arxiv_version","alias_value":"1004.2887v1","created_at":"2026-05-18T04:42:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.2887","created_at":"2026-05-18T04:42:23Z"},{"alias_kind":"pith_short_12","alias_value":"SP3KBYWNXAE2","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"SP3KBYWNXAE2Y5VG","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"SP3KBYWN","created_at":"2026-05-18T12:26:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:SP3KBYWNXAE2Y5VGLVOUE3UUAN","target":"record","payload":{"canonical_record":{"source":{"id":"1004.2887","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2010-04-16T17:07:43Z","cross_cats_sorted":[],"title_canon_sha256":"8c9c161972f40b97fe012713c255337b7c9a9da7e09aef92dcad3c53fd3cfc22","abstract_canon_sha256":"bec59683839fe43adb5639f01a885b7d9b61e539b497d0ead4e84af11a35fee8"},"schema_version":"1.0"},"canonical_sha256":"93f6a0e2cdb809ac76a65d5d426e940368a7f2dd9c83ebf34a38c07bd9d2565f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:42:23.043036Z","signature_b64":"tUfni2cDlBfzw3DTuXkEYFpdwGpKz4C8P+d4w+U2T+EuEngZbUbk/YCF8ca12ztdC2e858AhueNCFDvjdpfxAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"93f6a0e2cdb809ac76a65d5d426e940368a7f2dd9c83ebf34a38c07bd9d2565f","last_reissued_at":"2026-05-18T04:42:23.042551Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:42:23.042551Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1004.2887","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":"2026-05-18T04:42:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mJhf7PDLvhlx4/7JWZpz0P3OLfcZlsxc7f9ccy67o//TMgOmg8svv6/YcBA6LzTMa1yLngS3SqYjX30QFBFICw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:49:28.889262Z"},"content_sha256":"3a9ca8b367013789ebe085b60d593b532e9b7f16753872758423d68ccfbce0c8","schema_version":"1.0","event_id":"sha256:3a9ca8b367013789ebe085b60d593b532e9b7f16753872758423d68ccfbce0c8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:SP3KBYWNXAE2Y5VGLVOUE3UUAN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Collective excitation of a Bose-Einstein condensate by modulation of the atomic scattering length","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.quant-gas","authors_text":"D. Dries, E. A. L. Henn, E. R. F. Ramos, K. M. F. Magalhaes, M. A. Caracanhas, R. G. Hulet, S. E. Pollack, V. S. Bagnato","submitted_at":"2010-04-16T17:07:43Z","abstract_excerpt":"We excite the lowest-lying quadrupole mode of a Bose-Einstein condensate by modulating the atomic scattering length via a Feshbach resonance. Excitation occurs at various modulation frequencies, and resonances located at the natural quadrupole frequency of the condensate and at the first harmonic are observed. We also investigate the amplitude of the excited mode as a function of modulation depth. Numerical simulations based on a variational calculation agree with our experimental results and provide insight into the observed behavior."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.2887","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":"2026-05-18T04:42:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OOyu04spjRgzW9JoefbKyb/6B3J+VDWP4RJ7KfIw3douhw956urd1Ieyvt7ci50LMUM1r4+3mKECbN07vg1DBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:49:28.889921Z"},"content_sha256":"27a2dd8579adaa58c16964bf51e3cd381799bcc91d877784afa08c7a29ebd90c","schema_version":"1.0","event_id":"sha256:27a2dd8579adaa58c16964bf51e3cd381799bcc91d877784afa08c7a29ebd90c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SP3KBYWNXAE2Y5VGLVOUE3UUAN/bundle.json","state_url":"https://pith.science/pith/SP3KBYWNXAE2Y5VGLVOUE3UUAN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SP3KBYWNXAE2Y5VGLVOUE3UUAN/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":"2026-05-27T16:49:28Z","links":{"resolver":"https://pith.science/pith/SP3KBYWNXAE2Y5VGLVOUE3UUAN","bundle":"https://pith.science/pith/SP3KBYWNXAE2Y5VGLVOUE3UUAN/bundle.json","state":"https://pith.science/pith/SP3KBYWNXAE2Y5VGLVOUE3UUAN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SP3KBYWNXAE2Y5VGLVOUE3UUAN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:SP3KBYWNXAE2Y5VGLVOUE3UUAN","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":"bec59683839fe43adb5639f01a885b7d9b61e539b497d0ead4e84af11a35fee8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2010-04-16T17:07:43Z","title_canon_sha256":"8c9c161972f40b97fe012713c255337b7c9a9da7e09aef92dcad3c53fd3cfc22"},"schema_version":"1.0","source":{"id":"1004.2887","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.2887","created_at":"2026-05-18T04:42:23Z"},{"alias_kind":"arxiv_version","alias_value":"1004.2887v1","created_at":"2026-05-18T04:42:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.2887","created_at":"2026-05-18T04:42:23Z"},{"alias_kind":"pith_short_12","alias_value":"SP3KBYWNXAE2","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"SP3KBYWNXAE2Y5VG","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"SP3KBYWN","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:27a2dd8579adaa58c16964bf51e3cd381799bcc91d877784afa08c7a29ebd90c","target":"graph","created_at":"2026-05-18T04:42:23Z","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 excite the lowest-lying quadrupole mode of a Bose-Einstein condensate by modulating the atomic scattering length via a Feshbach resonance. Excitation occurs at various modulation frequencies, and resonances located at the natural quadrupole frequency of the condensate and at the first harmonic are observed. We also investigate the amplitude of the excited mode as a function of modulation depth. Numerical simulations based on a variational calculation agree with our experimental results and provide insight into the observed behavior.","authors_text":"D. Dries, E. A. L. Henn, E. R. F. Ramos, K. M. F. Magalhaes, M. A. Caracanhas, R. G. Hulet, S. E. Pollack, V. S. Bagnato","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2010-04-16T17:07:43Z","title":"Collective excitation of a Bose-Einstein condensate by modulation of the atomic scattering length"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.2887","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":"sha256:3a9ca8b367013789ebe085b60d593b532e9b7f16753872758423d68ccfbce0c8","target":"record","created_at":"2026-05-18T04:42:23Z","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":"bec59683839fe43adb5639f01a885b7d9b61e539b497d0ead4e84af11a35fee8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2010-04-16T17:07:43Z","title_canon_sha256":"8c9c161972f40b97fe012713c255337b7c9a9da7e09aef92dcad3c53fd3cfc22"},"schema_version":"1.0","source":{"id":"1004.2887","kind":"arxiv","version":1}},"canonical_sha256":"93f6a0e2cdb809ac76a65d5d426e940368a7f2dd9c83ebf34a38c07bd9d2565f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"93f6a0e2cdb809ac76a65d5d426e940368a7f2dd9c83ebf34a38c07bd9d2565f","first_computed_at":"2026-05-18T04:42:23.042551Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:42:23.042551Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tUfni2cDlBfzw3DTuXkEYFpdwGpKz4C8P+d4w+U2T+EuEngZbUbk/YCF8ca12ztdC2e858AhueNCFDvjdpfxAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:42:23.043036Z","signed_message":"canonical_sha256_bytes"},"source_id":"1004.2887","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a9ca8b367013789ebe085b60d593b532e9b7f16753872758423d68ccfbce0c8","sha256:27a2dd8579adaa58c16964bf51e3cd381799bcc91d877784afa08c7a29ebd90c"],"state_sha256":"c17f343f08e3fd7c5b516d9cb0aed477fc721c7c95f22a8c1a795787c3814105"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vkvjqiMVndRm9Lx4P9ygXxm4REXVobt43+dHPFy+XcF3Ep+cqO60WWFFpM1fFrMErhehpljvW/vhpbc9GF/ACg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T16:49:28.893351Z","bundle_sha256":"031e190b416bc8021faf5a95856fdc46812f9147030758fc262ec622d6f503e6"}}