{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:DITCEOXFJ7YEJOKV22ZFAU364G","short_pith_number":"pith:DITCEOXF","canonical_record":{"source":{"id":"1310.5894","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-10-22T12:38:41Z","cross_cats_sorted":[],"title_canon_sha256":"f869db7d9be4e9c8892471795e6f29576003d74d96a58f987c6f23db7f50948a","abstract_canon_sha256":"1713532d104679163258ba670d64244515068d7ba5a5de0b95d0566edd906364"},"schema_version":"1.0"},"canonical_sha256":"1a26223ae54ff044b955d6b250537ee18e5731d3bf65da4dca4cb41a93268b5e","source":{"kind":"arxiv","id":"1310.5894","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.5894","created_at":"2026-05-18T01:46:56Z"},{"alias_kind":"arxiv_version","alias_value":"1310.5894v1","created_at":"2026-05-18T01:46:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.5894","created_at":"2026-05-18T01:46:56Z"},{"alias_kind":"pith_short_12","alias_value":"DITCEOXFJ7YE","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DITCEOXFJ7YEJOKV","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DITCEOXF","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:DITCEOXFJ7YEJOKV22ZFAU364G","target":"record","payload":{"canonical_record":{"source":{"id":"1310.5894","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-10-22T12:38:41Z","cross_cats_sorted":[],"title_canon_sha256":"f869db7d9be4e9c8892471795e6f29576003d74d96a58f987c6f23db7f50948a","abstract_canon_sha256":"1713532d104679163258ba670d64244515068d7ba5a5de0b95d0566edd906364"},"schema_version":"1.0"},"canonical_sha256":"1a26223ae54ff044b955d6b250537ee18e5731d3bf65da4dca4cb41a93268b5e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:56.300090Z","signature_b64":"dcekhQ7QEHuPNjvG8ckGCGfDSqRJAXOL+j5qtZbNvVzYnl00qAZf1gg98WdL5h5RpdvFlIMeYT/t6IYksJqIAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1a26223ae54ff044b955d6b250537ee18e5731d3bf65da4dca4cb41a93268b5e","last_reissued_at":"2026-05-18T01:46:56.299457Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:56.299457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1310.5894","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":"2026-05-18T01:46:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ct/KJ3CqyjtwcGHdSquHO3QrECjGKMVk8nT9maR2S96WGGpoRlAU0s83UExMOKGM7Aw+V1Id+JjXxySq/oeTAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T15:16:03.354118Z"},"content_sha256":"86363b5191fed9613c99d34d32cc320f5e340e60c26e4ce795bf1ce6669c3a42","schema_version":"1.0","event_id":"sha256:86363b5191fed9613c99d34d32cc320f5e340e60c26e4ce795bf1ce6669c3a42"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:DITCEOXFJ7YEJOKV22ZFAU364G","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tapered nanofiber trapping of high-refractive-index nanoparticles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Joachim Knittel, Jon D. Swaim, Warwick P. Bowen","submitted_at":"2013-10-22T12:38:41Z","abstract_excerpt":"A nanofiber-based optical tweezer is demonstrated. Trapping is achieved by combining attractive near-field optical gradient forces with repulsive electrostatic forces. Silica-coated Fe$_2$O$_3$ nanospheres of 300 diameter are trapped as close as 50 nm away from the surface with 810 $\\mu$W of optical power, with a maximum trap stiffness of 2.7 pN $\\mu$m$^{-1}$. Electrostatic trapping forces up to 0.5 pN are achieved, a factor of 50 larger than those achievable for the same optical power in conventional optical tweezers. Efficient collection of the optical field directly into the nanofiber enabl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.5894","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":"2026-05-18T01:46:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JLZHgHC8S1y8gvHLnfPI73Z5F5mFBIp0Wax2J3vX1IWSWqRVm013BbqB+cc19DDAlWQAIcn5ocVMXP9vB/UkCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T15:16:03.355261Z"},"content_sha256":"583be3550131375b89a08a5ef15898ff153e1cbcaadeb6f7de3a34cebf44ce56","schema_version":"1.0","event_id":"sha256:583be3550131375b89a08a5ef15898ff153e1cbcaadeb6f7de3a34cebf44ce56"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DITCEOXFJ7YEJOKV22ZFAU364G/bundle.json","state_url":"https://pith.science/pith/DITCEOXFJ7YEJOKV22ZFAU364G/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DITCEOXFJ7YEJOKV22ZFAU364G/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":"2026-05-31T15:16:03Z","links":{"resolver":"https://pith.science/pith/DITCEOXFJ7YEJOKV22ZFAU364G","bundle":"https://pith.science/pith/DITCEOXFJ7YEJOKV22ZFAU364G/bundle.json","state":"https://pith.science/pith/DITCEOXFJ7YEJOKV22ZFAU364G/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DITCEOXFJ7YEJOKV22ZFAU364G/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:DITCEOXFJ7YEJOKV22ZFAU364G","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":"1713532d104679163258ba670d64244515068d7ba5a5de0b95d0566edd906364","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-10-22T12:38:41Z","title_canon_sha256":"f869db7d9be4e9c8892471795e6f29576003d74d96a58f987c6f23db7f50948a"},"schema_version":"1.0","source":{"id":"1310.5894","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.5894","created_at":"2026-05-18T01:46:56Z"},{"alias_kind":"arxiv_version","alias_value":"1310.5894v1","created_at":"2026-05-18T01:46:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.5894","created_at":"2026-05-18T01:46:56Z"},{"alias_kind":"pith_short_12","alias_value":"DITCEOXFJ7YE","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DITCEOXFJ7YEJOKV","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DITCEOXF","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:583be3550131375b89a08a5ef15898ff153e1cbcaadeb6f7de3a34cebf44ce56","target":"graph","created_at":"2026-05-18T01:46:56Z","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":"A nanofiber-based optical tweezer is demonstrated. Trapping is achieved by combining attractive near-field optical gradient forces with repulsive electrostatic forces. Silica-coated Fe$_2$O$_3$ nanospheres of 300 diameter are trapped as close as 50 nm away from the surface with 810 $\\mu$W of optical power, with a maximum trap stiffness of 2.7 pN $\\mu$m$^{-1}$. Electrostatic trapping forces up to 0.5 pN are achieved, a factor of 50 larger than those achievable for the same optical power in conventional optical tweezers. Efficient collection of the optical field directly into the nanofiber enabl","authors_text":"Joachim Knittel, Jon D. Swaim, Warwick P. Bowen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-10-22T12:38:41Z","title":"Tapered nanofiber trapping of high-refractive-index nanoparticles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.5894","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":"sha256:86363b5191fed9613c99d34d32cc320f5e340e60c26e4ce795bf1ce6669c3a42","target":"record","created_at":"2026-05-18T01:46:56Z","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":"1713532d104679163258ba670d64244515068d7ba5a5de0b95d0566edd906364","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-10-22T12:38:41Z","title_canon_sha256":"f869db7d9be4e9c8892471795e6f29576003d74d96a58f987c6f23db7f50948a"},"schema_version":"1.0","source":{"id":"1310.5894","kind":"arxiv","version":1}},"canonical_sha256":"1a26223ae54ff044b955d6b250537ee18e5731d3bf65da4dca4cb41a93268b5e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a26223ae54ff044b955d6b250537ee18e5731d3bf65da4dca4cb41a93268b5e","first_computed_at":"2026-05-18T01:46:56.299457Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:56.299457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dcekhQ7QEHuPNjvG8ckGCGfDSqRJAXOL+j5qtZbNvVzYnl00qAZf1gg98WdL5h5RpdvFlIMeYT/t6IYksJqIAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:56.300090Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.5894","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:86363b5191fed9613c99d34d32cc320f5e340e60c26e4ce795bf1ce6669c3a42","sha256:583be3550131375b89a08a5ef15898ff153e1cbcaadeb6f7de3a34cebf44ce56"],"state_sha256":"ed53ce8cb04b2decb475651dad8ec2a801558b87725dc5ba1180e1ee35d8b0a8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NFdeESzX3xNssJzaROs7NkAuzec9eNGc+PQQnMP7RsPi9QZsUjx4PZJCMy3s5SFdHfI8ygwqfFpw+82gOoAaAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T15:16:03.360966Z","bundle_sha256":"1da79921f090c19cbbaaf6c2ce54049c2b9e84152e92b77c9cf1db5b64de86f4"}}