{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:6VIRSKB3E6XS3U53TN7C32ELDF","short_pith_number":"pith:6VIRSKB3","canonical_record":{"source":{"id":"2105.01094","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-05-03T18:01:10Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"f1436bda6911f89ac6a43b11e133f4d3fbf0e1310e99224c5a20adc45f696470","abstract_canon_sha256":"0734651231283a0ca8c48d5fecef508931757984b583dfff5cef02d8724d3a08"},"schema_version":"1.0"},"canonical_sha256":"f55119283b27af2dd3bb9b7e2de88b197c308620149797eedbb21e28674d1304","source":{"kind":"arxiv","id":"2105.01094","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.01094","created_at":"2026-07-05T04:22:37Z"},{"alias_kind":"arxiv_version","alias_value":"2105.01094v3","created_at":"2026-07-05T04:22:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.01094","created_at":"2026-07-05T04:22:37Z"},{"alias_kind":"pith_short_12","alias_value":"6VIRSKB3E6XS","created_at":"2026-07-05T04:22:37Z"},{"alias_kind":"pith_short_16","alias_value":"6VIRSKB3E6XS3U53","created_at":"2026-07-05T04:22:37Z"},{"alias_kind":"pith_short_8","alias_value":"6VIRSKB3","created_at":"2026-07-05T04:22:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:6VIRSKB3E6XS3U53TN7C32ELDF","target":"record","payload":{"canonical_record":{"source":{"id":"2105.01094","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-05-03T18:01:10Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"f1436bda6911f89ac6a43b11e133f4d3fbf0e1310e99224c5a20adc45f696470","abstract_canon_sha256":"0734651231283a0ca8c48d5fecef508931757984b583dfff5cef02d8724d3a08"},"schema_version":"1.0"},"canonical_sha256":"f55119283b27af2dd3bb9b7e2de88b197c308620149797eedbb21e28674d1304","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:22:37.576299Z","signature_b64":"bOlqQLuIFeGIq5rTgJn3mXBWbex/tml91vLCy38y7P25WCoF4DquME8WOBtx5/5yftiYfdJRYeha/k88f6hZBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f55119283b27af2dd3bb9b7e2de88b197c308620149797eedbb21e28674d1304","last_reissued_at":"2026-07-05T04:22:37.575856Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:22:37.575856Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.01094","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:22:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qc19GdExye6qXAPztQWT+ldUzzMdgHd5L1cK5DEEjjZb4xUyZwJwrR0OA+rUH3BwsCd6486paMrpnP0d8TLJCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T05:05:46.907448Z"},"content_sha256":"752432770ba65c6a9bfe7341cbb07f1d50f23a2a1d05b016065f5c06af565739","schema_version":"1.0","event_id":"sha256:752432770ba65c6a9bfe7341cbb07f1d50f23a2a1d05b016065f5c06af565739"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:6VIRSKB3E6XS3U53TN7C32ELDF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constructing Nano-Object Quantum Superpositions with a Stern-Gerlach Interferometer","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"quant-ph","authors_text":"Anupam Mazumdar, Ron Folman, Ryan J. Marshman, Sougato Bose","submitted_at":"2021-05-03T18:01:10Z","abstract_excerpt":"Probing quantum mechanics, quantum aspects of general relativity along with the sensing and the constraining of classical gravity can all be enabled by unprecedented spatial sizes of superpositions of massive objects. In this paper, we show that there is a feasible setup sourced by realizable magnetic field gradients ${\\cal O}(10-100)$ Tm$^{-1}$ to construct a large spatial superposition of ${\\cal O}(10^{-4}-10^{-8})$ m for masses ${\\cal O}(10^{-16}-10^{-14})$ kg over a time period of up to $0.1-10$ seconds."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.01094","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2105.01094/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T04:22:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v+kPS8v8ZyPXmnqLWZsvIqWyBki0FEZVkTM5YHJyZYsbdtHHg+O0tFqDqlCQzqmRiKgKw2xlozdDjvv/TCqRAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T05:05:46.908044Z"},"content_sha256":"831dbdadc42655c68cd30ecf3ffaccad12cbb75040322480b45404fd7a5a49b9","schema_version":"1.0","event_id":"sha256:831dbdadc42655c68cd30ecf3ffaccad12cbb75040322480b45404fd7a5a49b9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6VIRSKB3E6XS3U53TN7C32ELDF/bundle.json","state_url":"https://pith.science/pith/6VIRSKB3E6XS3U53TN7C32ELDF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6VIRSKB3E6XS3U53TN7C32ELDF/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":"2026-08-05T05:05:46Z","links":{"resolver":"https://pith.science/pith/6VIRSKB3E6XS3U53TN7C32ELDF","bundle":"https://pith.science/pith/6VIRSKB3E6XS3U53TN7C32ELDF/bundle.json","state":"https://pith.science/pith/6VIRSKB3E6XS3U53TN7C32ELDF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6VIRSKB3E6XS3U53TN7C32ELDF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:6VIRSKB3E6XS3U53TN7C32ELDF","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":"0734651231283a0ca8c48d5fecef508931757984b583dfff5cef02d8724d3a08","cross_cats_sorted":["gr-qc"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-05-03T18:01:10Z","title_canon_sha256":"f1436bda6911f89ac6a43b11e133f4d3fbf0e1310e99224c5a20adc45f696470"},"schema_version":"1.0","source":{"id":"2105.01094","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.01094","created_at":"2026-07-05T04:22:37Z"},{"alias_kind":"arxiv_version","alias_value":"2105.01094v3","created_at":"2026-07-05T04:22:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.01094","created_at":"2026-07-05T04:22:37Z"},{"alias_kind":"pith_short_12","alias_value":"6VIRSKB3E6XS","created_at":"2026-07-05T04:22:37Z"},{"alias_kind":"pith_short_16","alias_value":"6VIRSKB3E6XS3U53","created_at":"2026-07-05T04:22:37Z"},{"alias_kind":"pith_short_8","alias_value":"6VIRSKB3","created_at":"2026-07-05T04:22:37Z"}],"graph_snapshots":[{"event_id":"sha256:831dbdadc42655c68cd30ecf3ffaccad12cbb75040322480b45404fd7a5a49b9","target":"graph","created_at":"2026-07-05T04:22:37Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2105.01094/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Probing quantum mechanics, quantum aspects of general relativity along with the sensing and the constraining of classical gravity can all be enabled by unprecedented spatial sizes of superpositions of massive objects. In this paper, we show that there is a feasible setup sourced by realizable magnetic field gradients ${\\cal O}(10-100)$ Tm$^{-1}$ to construct a large spatial superposition of ${\\cal O}(10^{-4}-10^{-8})$ m for masses ${\\cal O}(10^{-16}-10^{-14})$ kg over a time period of up to $0.1-10$ seconds.","authors_text":"Anupam Mazumdar, Ron Folman, Ryan J. Marshman, Sougato Bose","cross_cats":["gr-qc"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-05-03T18:01:10Z","title":"Constructing Nano-Object Quantum Superpositions with a Stern-Gerlach Interferometer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.01094","kind":"arxiv","version":3},"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":"sha256:752432770ba65c6a9bfe7341cbb07f1d50f23a2a1d05b016065f5c06af565739","target":"record","created_at":"2026-07-05T04:22:37Z","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":"0734651231283a0ca8c48d5fecef508931757984b583dfff5cef02d8724d3a08","cross_cats_sorted":["gr-qc"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-05-03T18:01:10Z","title_canon_sha256":"f1436bda6911f89ac6a43b11e133f4d3fbf0e1310e99224c5a20adc45f696470"},"schema_version":"1.0","source":{"id":"2105.01094","kind":"arxiv","version":3}},"canonical_sha256":"f55119283b27af2dd3bb9b7e2de88b197c308620149797eedbb21e28674d1304","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f55119283b27af2dd3bb9b7e2de88b197c308620149797eedbb21e28674d1304","first_computed_at":"2026-07-05T04:22:37.575856Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:22:37.575856Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bOlqQLuIFeGIq5rTgJn3mXBWbex/tml91vLCy38y7P25WCoF4DquME8WOBtx5/5yftiYfdJRYeha/k88f6hZBw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:22:37.576299Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.01094","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:752432770ba65c6a9bfe7341cbb07f1d50f23a2a1d05b016065f5c06af565739","sha256:831dbdadc42655c68cd30ecf3ffaccad12cbb75040322480b45404fd7a5a49b9"],"state_sha256":"774e2c66e2dc14d8592a67fa03e394b9f841b7d323cf458bab56676112111502"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hFv/qyc3PeEeqhwPkToU9q7xX/uRDtVZebjNXc9oy1Y3JKxkQXm1osJBoXKx7i6nmRAUVbt5I60TEpu2zgwADA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T05:05:46.913378Z","bundle_sha256":"e5128ad1d1a5c6c6daf090ab5ee8d5a61112f2209ccf43aa309ae710c49192e2"}}