{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:YXRWRQ3VIGIFCYUDCCP6TWXYIK","short_pith_number":"pith:YXRWRQ3V","canonical_record":{"source":{"id":"2103.06851","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-03-11T18:26:29Z","cross_cats_sorted":[],"title_canon_sha256":"1d75d13d5ac4938db225baf4da7adfec2d418da02a40a0f7b8b77e064ab54c1d","abstract_canon_sha256":"1152ffd9b3f2c7439ecc7b09e1b1c562314cfb3bed313c7fdfda34201da6ba12"},"schema_version":"1.0"},"canonical_sha256":"c5e368c3754190516283109fe9daf842a5c7778405b03408f19f5fabf8cd6257","source":{"kind":"arxiv","id":"2103.06851","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.06851","created_at":"2026-07-05T02:22:19Z"},{"alias_kind":"arxiv_version","alias_value":"2103.06851v1","created_at":"2026-07-05T02:22:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.06851","created_at":"2026-07-05T02:22:19Z"},{"alias_kind":"pith_short_12","alias_value":"YXRWRQ3VIGIF","created_at":"2026-07-05T02:22:19Z"},{"alias_kind":"pith_short_16","alias_value":"YXRWRQ3VIGIFCYUD","created_at":"2026-07-05T02:22:19Z"},{"alias_kind":"pith_short_8","alias_value":"YXRWRQ3V","created_at":"2026-07-05T02:22:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:YXRWRQ3VIGIFCYUDCCP6TWXYIK","target":"record","payload":{"canonical_record":{"source":{"id":"2103.06851","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-03-11T18:26:29Z","cross_cats_sorted":[],"title_canon_sha256":"1d75d13d5ac4938db225baf4da7adfec2d418da02a40a0f7b8b77e064ab54c1d","abstract_canon_sha256":"1152ffd9b3f2c7439ecc7b09e1b1c562314cfb3bed313c7fdfda34201da6ba12"},"schema_version":"1.0"},"canonical_sha256":"c5e368c3754190516283109fe9daf842a5c7778405b03408f19f5fabf8cd6257","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:22:19.719265Z","signature_b64":"Y66CFrNOT2I81QV8ZNzkqcR5lCylT9PzPXPlvmJX7Qc3yMgidxt5HYRpOseBhXAwnDth8JjhTDfDjWDMSeTVBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c5e368c3754190516283109fe9daf842a5c7778405b03408f19f5fabf8cd6257","last_reissued_at":"2026-07-05T02:22:19.718915Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:22:19.718915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2103.06851","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":"2026-07-05T02:22:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wcEe6mhZsXRA8fWfnSCjPfvCT/0vQHJVYGGYkTc8u60ewD4xbP/WbgCtHceWUZEJz7vKf1p0Ip/P2lLJBmNnCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T23:30:33.562731Z"},"content_sha256":"3d119126a0ef05bad308c84981051497b570692cd9e4a8f84b2d97ba6a385b7e","schema_version":"1.0","event_id":"sha256:3d119126a0ef05bad308c84981051497b570692cd9e4a8f84b2d97ba6a385b7e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:YXRWRQ3VIGIFCYUDCCP6TWXYIK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Free-space confocal magneto-optical spectroscopies at milliKelvin temperatures","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"B.J. Lawrie, C.E. Marvinney, M. Feldman, Y.Y. Pai","submitted_at":"2021-03-11T18:26:29Z","abstract_excerpt":"We describe the operation of a free-space confocal optical microscope operated in a dilution refrigerator. The microscope is installed on a cold insertable probe to enable fast sample exchange while the refrigerator is held at low temperatures. A vector magnet provides a 6 T field normal to the sample and 1 T fields at arbitrary angles. A variety of optical microscopies and spectroscopies, including photoluminescence, Raman, magneto-optical Kerr effect, and spin relaxometry measurements are described, and some of the challenges associated with performing these measurements at milliKelvin tempe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.06851","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2103.06851/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":"2026-07-05T02:22:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/abNzqXx6/r9cuuNRVqJ9mJp92yD3POIF1+W5hIynMB8dDU0opw5f925U352HWKqwwDJGtQC/DTUi/0b7t7eBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T23:30:33.563284Z"},"content_sha256":"43da9124b12fc640b94fa0926b25608a92ce802c4b019278530a1a565326a79f","schema_version":"1.0","event_id":"sha256:43da9124b12fc640b94fa0926b25608a92ce802c4b019278530a1a565326a79f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YXRWRQ3VIGIFCYUDCCP6TWXYIK/bundle.json","state_url":"https://pith.science/pith/YXRWRQ3VIGIFCYUDCCP6TWXYIK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YXRWRQ3VIGIFCYUDCCP6TWXYIK/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":"2026-08-21T23:30:33Z","links":{"resolver":"https://pith.science/pith/YXRWRQ3VIGIFCYUDCCP6TWXYIK","bundle":"https://pith.science/pith/YXRWRQ3VIGIFCYUDCCP6TWXYIK/bundle.json","state":"https://pith.science/pith/YXRWRQ3VIGIFCYUDCCP6TWXYIK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YXRWRQ3VIGIFCYUDCCP6TWXYIK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:YXRWRQ3VIGIFCYUDCCP6TWXYIK","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":"1152ffd9b3f2c7439ecc7b09e1b1c562314cfb3bed313c7fdfda34201da6ba12","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-03-11T18:26:29Z","title_canon_sha256":"1d75d13d5ac4938db225baf4da7adfec2d418da02a40a0f7b8b77e064ab54c1d"},"schema_version":"1.0","source":{"id":"2103.06851","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.06851","created_at":"2026-07-05T02:22:19Z"},{"alias_kind":"arxiv_version","alias_value":"2103.06851v1","created_at":"2026-07-05T02:22:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.06851","created_at":"2026-07-05T02:22:19Z"},{"alias_kind":"pith_short_12","alias_value":"YXRWRQ3VIGIF","created_at":"2026-07-05T02:22:19Z"},{"alias_kind":"pith_short_16","alias_value":"YXRWRQ3VIGIFCYUD","created_at":"2026-07-05T02:22:19Z"},{"alias_kind":"pith_short_8","alias_value":"YXRWRQ3V","created_at":"2026-07-05T02:22:19Z"}],"graph_snapshots":[{"event_id":"sha256:43da9124b12fc640b94fa0926b25608a92ce802c4b019278530a1a565326a79f","target":"graph","created_at":"2026-07-05T02:22:19Z","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/2103.06851/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We describe the operation of a free-space confocal optical microscope operated in a dilution refrigerator. The microscope is installed on a cold insertable probe to enable fast sample exchange while the refrigerator is held at low temperatures. A vector magnet provides a 6 T field normal to the sample and 1 T fields at arbitrary angles. A variety of optical microscopies and spectroscopies, including photoluminescence, Raman, magneto-optical Kerr effect, and spin relaxometry measurements are described, and some of the challenges associated with performing these measurements at milliKelvin tempe","authors_text":"B.J. Lawrie, C.E. Marvinney, M. Feldman, Y.Y. Pai","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-03-11T18:26:29Z","title":"Free-space confocal magneto-optical spectroscopies at milliKelvin temperatures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.06851","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":"sha256:3d119126a0ef05bad308c84981051497b570692cd9e4a8f84b2d97ba6a385b7e","target":"record","created_at":"2026-07-05T02:22:19Z","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":"1152ffd9b3f2c7439ecc7b09e1b1c562314cfb3bed313c7fdfda34201da6ba12","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-03-11T18:26:29Z","title_canon_sha256":"1d75d13d5ac4938db225baf4da7adfec2d418da02a40a0f7b8b77e064ab54c1d"},"schema_version":"1.0","source":{"id":"2103.06851","kind":"arxiv","version":1}},"canonical_sha256":"c5e368c3754190516283109fe9daf842a5c7778405b03408f19f5fabf8cd6257","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c5e368c3754190516283109fe9daf842a5c7778405b03408f19f5fabf8cd6257","first_computed_at":"2026-07-05T02:22:19.718915Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:22:19.718915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y66CFrNOT2I81QV8ZNzkqcR5lCylT9PzPXPlvmJX7Qc3yMgidxt5HYRpOseBhXAwnDth8JjhTDfDjWDMSeTVBA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:22:19.719265Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.06851","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d119126a0ef05bad308c84981051497b570692cd9e4a8f84b2d97ba6a385b7e","sha256:43da9124b12fc640b94fa0926b25608a92ce802c4b019278530a1a565326a79f"],"state_sha256":"5ff3471ffde2e06d77097ebc738e0441d5616f316d94358b3158fdf46607a7b4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NhRJaiuZhMn4QfKQe7q51grXgbQRZwIgwwTrcJPocUeWw5iLcoG7kW67N02Inv2kwodHQH4335tdDGAi0nHCAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T23:30:33.566898Z","bundle_sha256":"06da494ec5d2655c94e3ef122b435bc021128055e39fb88c77dc8966576941f5"}}