{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:W2I32PSC6ZS4OXHEMN6NXSCSIA","short_pith_number":"pith:W2I32PSC","canonical_record":{"source":{"id":"1810.05779","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-10-13T01:32:07Z","cross_cats_sorted":["cond-mat.mes-hall","physics.optics"],"title_canon_sha256":"6e7fe4bef58c051fc659774a95af4c6f64ba7dab47280db3840e4c77ccbbf6a5","abstract_canon_sha256":"94199ebe01b0028f832fbda9ef608a0d405d89a5384171bb601d979bd222e884"},"schema_version":"1.0"},"canonical_sha256":"b691bd3e42f665c75ce4637cdbc852402e914208380831e503e48d75d4d63330","source":{"kind":"arxiv","id":"1810.05779","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.05779","created_at":"2026-05-17T23:54:10Z"},{"alias_kind":"arxiv_version","alias_value":"1810.05779v2","created_at":"2026-05-17T23:54:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.05779","created_at":"2026-05-17T23:54:10Z"},{"alias_kind":"pith_short_12","alias_value":"W2I32PSC6ZS4","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"W2I32PSC6ZS4OXHE","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"W2I32PSC","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:W2I32PSC6ZS4OXHEMN6NXSCSIA","target":"record","payload":{"canonical_record":{"source":{"id":"1810.05779","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-10-13T01:32:07Z","cross_cats_sorted":["cond-mat.mes-hall","physics.optics"],"title_canon_sha256":"6e7fe4bef58c051fc659774a95af4c6f64ba7dab47280db3840e4c77ccbbf6a5","abstract_canon_sha256":"94199ebe01b0028f832fbda9ef608a0d405d89a5384171bb601d979bd222e884"},"schema_version":"1.0"},"canonical_sha256":"b691bd3e42f665c75ce4637cdbc852402e914208380831e503e48d75d4d63330","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:10.764875Z","signature_b64":"VS35LzlxbnOvXXjJRqKg8ymeuYDICvnFSwyjaDZjzIE/F3pY3imUSoHZrEa0rDgKYsTnl7qywE/+x8AW1CRsBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b691bd3e42f665c75ce4637cdbc852402e914208380831e503e48d75d4d63330","last_reissued_at":"2026-05-17T23:54:10.764072Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:10.764072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.05779","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":"2026-05-17T23:54:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u4Q45lRyl2PB1Blyp3beQ2kLqtuuPmz52O7h5t01Mssyb30Cb7YV7N2c5lYW9RNTlH6YJv27CX1DF+D/7BsfDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T15:48:52.166651Z"},"content_sha256":"086ced264adf0c749fa9108fea0f874715887e3e82f093be22b79f10e6ab5b62","schema_version":"1.0","event_id":"sha256:086ced264adf0c749fa9108fea0f874715887e3e82f093be22b79f10e6ab5b62"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:W2I32PSC6ZS4OXHEMN6NXSCSIA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Three-dimensional force-field microscopy with optically levitated microspheres","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","physics.optics"],"primary_cat":"physics.ins-det","authors_text":"Akio Kawasaki, Alexander D. Rider, Charles P. Blakemore, Giorgio Gratta, Qidong Wang, Sandip Roy","submitted_at":"2018-10-13T01:32:07Z","abstract_excerpt":"We report on the use of 4.7-$\\mu$m-diameter, optically levitated, charged microspheres to image the three-dimensional force field produced by charge distributions on an Au-coated, microfabricated Si beam in vacuum. An upward-propagating, single-beam optical trap, combined with an interferometric imaging technique, provides optimal access to the microspheres for microscopy. In this demonstration, the Au-coated surface of the Si beam can be brought as close as ${\\sim}10~\\mu$m from the center of the microsphere while forces are simultaneously measured along all three orthogonal axes, fully mappin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.05779","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":"2026-05-17T23:54:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m5GTnY5XwtNCx5NDIgC3wPmvEfjxEW9Jpa6RbgoPzWgRDTNzdY86NM8o6mLLUNGLnha7CvET6ObHithDLVXkBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T15:48:52.166998Z"},"content_sha256":"f80d8bf5984ddd3e58af451cd6314044f3a9e6950affc3c6a5fcda442324f7f5","schema_version":"1.0","event_id":"sha256:f80d8bf5984ddd3e58af451cd6314044f3a9e6950affc3c6a5fcda442324f7f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W2I32PSC6ZS4OXHEMN6NXSCSIA/bundle.json","state_url":"https://pith.science/pith/W2I32PSC6ZS4OXHEMN6NXSCSIA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W2I32PSC6ZS4OXHEMN6NXSCSIA/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":"2026-06-03T15:48:52Z","links":{"resolver":"https://pith.science/pith/W2I32PSC6ZS4OXHEMN6NXSCSIA","bundle":"https://pith.science/pith/W2I32PSC6ZS4OXHEMN6NXSCSIA/bundle.json","state":"https://pith.science/pith/W2I32PSC6ZS4OXHEMN6NXSCSIA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W2I32PSC6ZS4OXHEMN6NXSCSIA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:W2I32PSC6ZS4OXHEMN6NXSCSIA","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":"94199ebe01b0028f832fbda9ef608a0d405d89a5384171bb601d979bd222e884","cross_cats_sorted":["cond-mat.mes-hall","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-10-13T01:32:07Z","title_canon_sha256":"6e7fe4bef58c051fc659774a95af4c6f64ba7dab47280db3840e4c77ccbbf6a5"},"schema_version":"1.0","source":{"id":"1810.05779","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.05779","created_at":"2026-05-17T23:54:10Z"},{"alias_kind":"arxiv_version","alias_value":"1810.05779v2","created_at":"2026-05-17T23:54:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.05779","created_at":"2026-05-17T23:54:10Z"},{"alias_kind":"pith_short_12","alias_value":"W2I32PSC6ZS4","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"W2I32PSC6ZS4OXHE","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"W2I32PSC","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:f80d8bf5984ddd3e58af451cd6314044f3a9e6950affc3c6a5fcda442324f7f5","target":"graph","created_at":"2026-05-17T23:54:10Z","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 use of 4.7-$\\mu$m-diameter, optically levitated, charged microspheres to image the three-dimensional force field produced by charge distributions on an Au-coated, microfabricated Si beam in vacuum. An upward-propagating, single-beam optical trap, combined with an interferometric imaging technique, provides optimal access to the microspheres for microscopy. In this demonstration, the Au-coated surface of the Si beam can be brought as close as ${\\sim}10~\\mu$m from the center of the microsphere while forces are simultaneously measured along all three orthogonal axes, fully mappin","authors_text":"Akio Kawasaki, Alexander D. Rider, Charles P. Blakemore, Giorgio Gratta, Qidong Wang, Sandip Roy","cross_cats":["cond-mat.mes-hall","physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-10-13T01:32:07Z","title":"Three-dimensional force-field microscopy with optically levitated microspheres"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.05779","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":"sha256:086ced264adf0c749fa9108fea0f874715887e3e82f093be22b79f10e6ab5b62","target":"record","created_at":"2026-05-17T23:54:10Z","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":"94199ebe01b0028f832fbda9ef608a0d405d89a5384171bb601d979bd222e884","cross_cats_sorted":["cond-mat.mes-hall","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-10-13T01:32:07Z","title_canon_sha256":"6e7fe4bef58c051fc659774a95af4c6f64ba7dab47280db3840e4c77ccbbf6a5"},"schema_version":"1.0","source":{"id":"1810.05779","kind":"arxiv","version":2}},"canonical_sha256":"b691bd3e42f665c75ce4637cdbc852402e914208380831e503e48d75d4d63330","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b691bd3e42f665c75ce4637cdbc852402e914208380831e503e48d75d4d63330","first_computed_at":"2026-05-17T23:54:10.764072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:10.764072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VS35LzlxbnOvXXjJRqKg8ymeuYDICvnFSwyjaDZjzIE/F3pY3imUSoHZrEa0rDgKYsTnl7qywE/+x8AW1CRsBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:10.764875Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.05779","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:086ced264adf0c749fa9108fea0f874715887e3e82f093be22b79f10e6ab5b62","sha256:f80d8bf5984ddd3e58af451cd6314044f3a9e6950affc3c6a5fcda442324f7f5"],"state_sha256":"0e03ea27a2a6dcdb544031b7bd3c3c2112745762adba89d8536f5fde13712266"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C62yiVGgfYT0mrIxF+K+P+HbGbvaiIdFMETS59zTP0LY70snIeeaj7Z5+9H5hCv6009i8SDAhh2ScCaxm8Z5DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T15:48:52.168970Z","bundle_sha256":"566130b95731a530164d81f85a3abb4e2bb945b295b778fab50cb800bc5a211a"}}