{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:X46JDUP3DEOMHITQYUHS7E7O3G","short_pith_number":"pith:X46JDUP3","canonical_record":{"source":{"id":"1804.04871","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-04-13T10:10:58Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"e3e27737b277f9b55ebd170544a9dda258f05d8020087992152c8b67263ee6c3","abstract_canon_sha256":"cfa0cb435801a69e4d090552bae2c9beec21440042967b690fbf249582543cea"},"schema_version":"1.0"},"canonical_sha256":"bf3c91d1fb191cc3a270c50f2f93eed98589192df5b8e60b4e32173c8d3d74d1","source":{"kind":"arxiv","id":"1804.04871","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.04871","created_at":"2026-05-18T00:12:48Z"},{"alias_kind":"arxiv_version","alias_value":"1804.04871v2","created_at":"2026-05-18T00:12:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.04871","created_at":"2026-05-18T00:12:48Z"},{"alias_kind":"pith_short_12","alias_value":"X46JDUP3DEOM","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"X46JDUP3DEOMHITQ","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"X46JDUP3","created_at":"2026-05-18T12:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:X46JDUP3DEOMHITQYUHS7E7O3G","target":"record","payload":{"canonical_record":{"source":{"id":"1804.04871","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-04-13T10:10:58Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"e3e27737b277f9b55ebd170544a9dda258f05d8020087992152c8b67263ee6c3","abstract_canon_sha256":"cfa0cb435801a69e4d090552bae2c9beec21440042967b690fbf249582543cea"},"schema_version":"1.0"},"canonical_sha256":"bf3c91d1fb191cc3a270c50f2f93eed98589192df5b8e60b4e32173c8d3d74d1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:48.136446Z","signature_b64":"wEQYYnPajz4rhmg/Xy985L7q7D8hd6A4lft8VvTySRwEsHURZz8Te3bS2Pq7/8K2ZKqmE2nmGO1yLBGeuuRGAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bf3c91d1fb191cc3a270c50f2f93eed98589192df5b8e60b4e32173c8d3d74d1","last_reissued_at":"2026-05-18T00:12:48.135924Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:48.135924Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.04871","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:12:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"emAobRbCAsEReVeqeQ2oRmbcjut1gfNzBPyzcGrK8tR87YFe+daPYZY1+VUHuwzx3DGm9WQ6uLuYLCX78rzrAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:07:35.514682Z"},"content_sha256":"88deca7cf7cfed13166a5d0d32d18a9b83fd07ff576a43e77ec55a1b2321b32b","schema_version":"1.0","event_id":"sha256:88deca7cf7cfed13166a5d0d32d18a9b83fd07ff576a43e77ec55a1b2321b32b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:X46JDUP3DEOMHITQYUHS7E7O3G","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spin-resolved single-atom imaging of $^6$Li in free space","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"cond-mat.quant-gas","authors_text":"Andrea Bergschneider, Gerhard Z\\\"urn, Jan Hendrik Becher, Philipp M. Preiss, Ralf Klemt, Selim Jochim, Vincent M. Klinkhamer","submitted_at":"2018-04-13T10:10:58Z","abstract_excerpt":"We present a versatile imaging scheme for fermionic $^6$Li atoms with single-particle sensitivity. Our method works for freely propagating particles and completely eliminates the need for confining potentials during the imaging process. We illuminate individual atoms in free space with resonant light and collect their fluorescence on an electron-multiplying CCD camera using a high-numerical-aperture imaging system. We detect approximately \\num{20} photons per atom during an exposure of 20 $\\mu$s and identify individual atoms with a fidelity of $99.4\\pm0.3$ % . By addressing different optical t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.04871","kind":"arxiv","version":2},"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":"2026-05-18T00:12:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hwlkgo8rXQeTJTcthsGgQgHThicK0Evb0Eii4vrn6tXqB1cJ0cl6Fp+JOxsVtSEzfT+cis9CrnEAtK092ZSQBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:07:35.515030Z"},"content_sha256":"9a2f8b6f9574ffd6be6ee98b7235d723b439688c94bee52583de52cd8b183f7c","schema_version":"1.0","event_id":"sha256:9a2f8b6f9574ffd6be6ee98b7235d723b439688c94bee52583de52cd8b183f7c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X46JDUP3DEOMHITQYUHS7E7O3G/bundle.json","state_url":"https://pith.science/pith/X46JDUP3DEOMHITQYUHS7E7O3G/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X46JDUP3DEOMHITQYUHS7E7O3G/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":"2026-06-02T21:07:35Z","links":{"resolver":"https://pith.science/pith/X46JDUP3DEOMHITQYUHS7E7O3G","bundle":"https://pith.science/pith/X46JDUP3DEOMHITQYUHS7E7O3G/bundle.json","state":"https://pith.science/pith/X46JDUP3DEOMHITQYUHS7E7O3G/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X46JDUP3DEOMHITQYUHS7E7O3G/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:X46JDUP3DEOMHITQYUHS7E7O3G","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":"cfa0cb435801a69e4d090552bae2c9beec21440042967b690fbf249582543cea","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-04-13T10:10:58Z","title_canon_sha256":"e3e27737b277f9b55ebd170544a9dda258f05d8020087992152c8b67263ee6c3"},"schema_version":"1.0","source":{"id":"1804.04871","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.04871","created_at":"2026-05-18T00:12:48Z"},{"alias_kind":"arxiv_version","alias_value":"1804.04871v2","created_at":"2026-05-18T00:12:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.04871","created_at":"2026-05-18T00:12:48Z"},{"alias_kind":"pith_short_12","alias_value":"X46JDUP3DEOM","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"X46JDUP3DEOMHITQ","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"X46JDUP3","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:9a2f8b6f9574ffd6be6ee98b7235d723b439688c94bee52583de52cd8b183f7c","target":"graph","created_at":"2026-05-18T00:12:48Z","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":"We present a versatile imaging scheme for fermionic $^6$Li atoms with single-particle sensitivity. Our method works for freely propagating particles and completely eliminates the need for confining potentials during the imaging process. We illuminate individual atoms in free space with resonant light and collect their fluorescence on an electron-multiplying CCD camera using a high-numerical-aperture imaging system. We detect approximately \\num{20} photons per atom during an exposure of 20 $\\mu$s and identify individual atoms with a fidelity of $99.4\\pm0.3$ % . By addressing different optical t","authors_text":"Andrea Bergschneider, Gerhard Z\\\"urn, Jan Hendrik Becher, Philipp M. Preiss, Ralf Klemt, Selim Jochim, Vincent M. Klinkhamer","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-04-13T10:10:58Z","title":"Spin-resolved single-atom imaging of $^6$Li in free space"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.04871","kind":"arxiv","version":2},"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":"sha256:88deca7cf7cfed13166a5d0d32d18a9b83fd07ff576a43e77ec55a1b2321b32b","target":"record","created_at":"2026-05-18T00:12:48Z","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":"cfa0cb435801a69e4d090552bae2c9beec21440042967b690fbf249582543cea","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-04-13T10:10:58Z","title_canon_sha256":"e3e27737b277f9b55ebd170544a9dda258f05d8020087992152c8b67263ee6c3"},"schema_version":"1.0","source":{"id":"1804.04871","kind":"arxiv","version":2}},"canonical_sha256":"bf3c91d1fb191cc3a270c50f2f93eed98589192df5b8e60b4e32173c8d3d74d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bf3c91d1fb191cc3a270c50f2f93eed98589192df5b8e60b4e32173c8d3d74d1","first_computed_at":"2026-05-18T00:12:48.135924Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:12:48.135924Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wEQYYnPajz4rhmg/Xy985L7q7D8hd6A4lft8VvTySRwEsHURZz8Te3bS2Pq7/8K2ZKqmE2nmGO1yLBGeuuRGAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:12:48.136446Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.04871","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:88deca7cf7cfed13166a5d0d32d18a9b83fd07ff576a43e77ec55a1b2321b32b","sha256:9a2f8b6f9574ffd6be6ee98b7235d723b439688c94bee52583de52cd8b183f7c"],"state_sha256":"617afdc8dce11f5365b56b1e17a5e89965097beaabb106a0599fbc854e73e964"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1SUDZz7hlZxxEyN7GgWfuFCHyqx10ToQHIjGyI3dB6F2kEAX6vNBUEFM7C3yF1bf4LTm9f2Tn2htObHbBTwCDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T21:07:35.517290Z","bundle_sha256":"a91face9690546bbfc38d12a5fcd172df6994240a0374f4acc9b8be800c3f7c6"}}