{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:D55QXKIT43HY2TMNLZY7YJBJKC","short_pith_number":"pith:D55QXKIT","canonical_record":{"source":{"id":"1802.02190","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-02-06T20:04:12Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"44d94a618744396afd7530b5c83d1895e48f04e6c9fedf9d0dd412bf5a8272f8","abstract_canon_sha256":"0eb476c0cf6a8afb8ede27300d35264893386e3dbafb660bbe70754e0736d3f4"},"schema_version":"1.0"},"canonical_sha256":"1f7b0ba913e6cf8d4d8d5e71fc242950906f2cd594598acc919c0853d7c3de8b","source":{"kind":"arxiv","id":"1802.02190","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.02190","created_at":"2026-05-17T23:52:08Z"},{"alias_kind":"arxiv_version","alias_value":"1802.02190v4","created_at":"2026-05-17T23:52:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.02190","created_at":"2026-05-17T23:52:08Z"},{"alias_kind":"pith_short_12","alias_value":"D55QXKIT43HY","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"D55QXKIT43HY2TMN","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"D55QXKIT","created_at":"2026-05-18T12:32:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:D55QXKIT43HY2TMNLZY7YJBJKC","target":"record","payload":{"canonical_record":{"source":{"id":"1802.02190","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-02-06T20:04:12Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"44d94a618744396afd7530b5c83d1895e48f04e6c9fedf9d0dd412bf5a8272f8","abstract_canon_sha256":"0eb476c0cf6a8afb8ede27300d35264893386e3dbafb660bbe70754e0736d3f4"},"schema_version":"1.0"},"canonical_sha256":"1f7b0ba913e6cf8d4d8d5e71fc242950906f2cd594598acc919c0853d7c3de8b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:52:08.077513Z","signature_b64":"p9JdaUaO8I036RqqKx3LxrSMtrmLM7BQFFKHCLdnPLI09w1ZzeczgfYnoCcke7Vx1d1Wife0VmDUd1ha0ES/Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1f7b0ba913e6cf8d4d8d5e71fc242950906f2cd594598acc919c0853d7c3de8b","last_reissued_at":"2026-05-17T23:52:08.077005Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:52:08.077005Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.02190","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:52:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E7GF+Kufr3JWBSOHAeBvuK99xMNquEWMztiwNChp4piSk+ygPZifric4jkPQO2SObuxaa7wzqcg1diyMaDFKDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T10:31:34.311614Z"},"content_sha256":"6c67b4d8f862a93db63722bcc06b5b22517eebbb51a49581702b6bf12a1ae4b8","schema_version":"1.0","event_id":"sha256:6c67b4d8f862a93db63722bcc06b5b22517eebbb51a49581702b6bf12a1ae4b8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:D55QXKIT43HY2TMNLZY7YJBJKC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Velocimetry of cold atoms by matterwave interferometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.atom-ph","authors_text":"David Elcock, Jack Saywell, Max Carey, Mohammad Belal, Tim Freegarde","submitted_at":"2018-02-06T20:04:12Z","abstract_excerpt":"We present an elegant application of matterwave interferometry to the velocimetry of cold atoms whereby, in analogy to Fourier transform spectroscopy, the 1-D velocity distribution is manifest in the frequency domain of the interferometer output. By using stimulated Raman transitions between hyperfine ground states to perform a three-pulse interferometer sequence, we have measured the velocity distributions of clouds of freely-expanding $^{85}$Rb atoms with temperatures of 33 $\\mu$K and 17 $\\mu$K. Quadrature measurement of the interferometer output as a function of the temporal asymmetry yield"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.02190","kind":"arxiv","version":4},"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":"2026-05-17T23:52:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kueDudCt5xr3mrAEKFsWRSeEVcvBWRgkmtWhtTtDOBDVXIKj/HkT3mZ1P6pHmP/DFlbDxaG5AKdyspJuxp7zAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T10:31:34.312244Z"},"content_sha256":"67afe991ec71d13e8e897fe2e7d7ffc98ac65d760a3ad9c6c9c7c2320403d630","schema_version":"1.0","event_id":"sha256:67afe991ec71d13e8e897fe2e7d7ffc98ac65d760a3ad9c6c9c7c2320403d630"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D55QXKIT43HY2TMNLZY7YJBJKC/bundle.json","state_url":"https://pith.science/pith/D55QXKIT43HY2TMNLZY7YJBJKC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D55QXKIT43HY2TMNLZY7YJBJKC/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":"2026-06-09T10:31:34Z","links":{"resolver":"https://pith.science/pith/D55QXKIT43HY2TMNLZY7YJBJKC","bundle":"https://pith.science/pith/D55QXKIT43HY2TMNLZY7YJBJKC/bundle.json","state":"https://pith.science/pith/D55QXKIT43HY2TMNLZY7YJBJKC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D55QXKIT43HY2TMNLZY7YJBJKC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:D55QXKIT43HY2TMNLZY7YJBJKC","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":"0eb476c0cf6a8afb8ede27300d35264893386e3dbafb660bbe70754e0736d3f4","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-02-06T20:04:12Z","title_canon_sha256":"44d94a618744396afd7530b5c83d1895e48f04e6c9fedf9d0dd412bf5a8272f8"},"schema_version":"1.0","source":{"id":"1802.02190","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.02190","created_at":"2026-05-17T23:52:08Z"},{"alias_kind":"arxiv_version","alias_value":"1802.02190v4","created_at":"2026-05-17T23:52:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.02190","created_at":"2026-05-17T23:52:08Z"},{"alias_kind":"pith_short_12","alias_value":"D55QXKIT43HY","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"D55QXKIT43HY2TMN","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"D55QXKIT","created_at":"2026-05-18T12:32:19Z"}],"graph_snapshots":[{"event_id":"sha256:67afe991ec71d13e8e897fe2e7d7ffc98ac65d760a3ad9c6c9c7c2320403d630","target":"graph","created_at":"2026-05-17T23:52:08Z","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 present an elegant application of matterwave interferometry to the velocimetry of cold atoms whereby, in analogy to Fourier transform spectroscopy, the 1-D velocity distribution is manifest in the frequency domain of the interferometer output. By using stimulated Raman transitions between hyperfine ground states to perform a three-pulse interferometer sequence, we have measured the velocity distributions of clouds of freely-expanding $^{85}$Rb atoms with temperatures of 33 $\\mu$K and 17 $\\mu$K. Quadrature measurement of the interferometer output as a function of the temporal asymmetry yield","authors_text":"David Elcock, Jack Saywell, Max Carey, Mohammad Belal, Tim Freegarde","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-02-06T20:04:12Z","title":"Velocimetry of cold atoms by matterwave interferometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.02190","kind":"arxiv","version":4},"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":"sha256:6c67b4d8f862a93db63722bcc06b5b22517eebbb51a49581702b6bf12a1ae4b8","target":"record","created_at":"2026-05-17T23:52:08Z","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":"0eb476c0cf6a8afb8ede27300d35264893386e3dbafb660bbe70754e0736d3f4","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-02-06T20:04:12Z","title_canon_sha256":"44d94a618744396afd7530b5c83d1895e48f04e6c9fedf9d0dd412bf5a8272f8"},"schema_version":"1.0","source":{"id":"1802.02190","kind":"arxiv","version":4}},"canonical_sha256":"1f7b0ba913e6cf8d4d8d5e71fc242950906f2cd594598acc919c0853d7c3de8b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f7b0ba913e6cf8d4d8d5e71fc242950906f2cd594598acc919c0853d7c3de8b","first_computed_at":"2026-05-17T23:52:08.077005Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:08.077005Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"p9JdaUaO8I036RqqKx3LxrSMtrmLM7BQFFKHCLdnPLI09w1ZzeczgfYnoCcke7Vx1d1Wife0VmDUd1ha0ES/Ag==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:08.077513Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.02190","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6c67b4d8f862a93db63722bcc06b5b22517eebbb51a49581702b6bf12a1ae4b8","sha256:67afe991ec71d13e8e897fe2e7d7ffc98ac65d760a3ad9c6c9c7c2320403d630"],"state_sha256":"3494ab92795bfc3a9c02c9527c6e74733cac51de30e75f35656c1d5bb85be54f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"spC5KldNyn1kACyZeFyUASYJzYamf2AjbGko8y7K7G8dq0lAeitn8Y3GoLrCeEhla3JgZb1F5KiTi5pUvD+jBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T10:31:34.315816Z","bundle_sha256":"961d1ccf269fe40cf188fff6bd07d755ff2f8b9e221bee04685bf389e952a717"}}