{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:CHMIBULIC5OU7GG6XMYVQ3KN5E","short_pith_number":"pith:CHMIBULI","canonical_record":{"source":{"id":"1802.03354","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-02-09T16:59:53Z","cross_cats_sorted":[],"title_canon_sha256":"a72cc5e51df7c809d6c75b8ddbc1b017626b84799ae6cfd6944c1b75f9d40953","abstract_canon_sha256":"dc30da1ec6f815981a1ec03a0dadfee1c51fb2f61747fdd9e72966ba68cb01bc"},"schema_version":"1.0"},"canonical_sha256":"11d880d168175d4f98debb31586d4de91fed27f834ef4171409354550edaa9d4","source":{"kind":"arxiv","id":"1802.03354","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.03354","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"arxiv_version","alias_value":"1802.03354v2","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.03354","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"pith_short_12","alias_value":"CHMIBULIC5OU","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CHMIBULIC5OU7GG6","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CHMIBULI","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:CHMIBULIC5OU7GG6XMYVQ3KN5E","target":"record","payload":{"canonical_record":{"source":{"id":"1802.03354","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-02-09T16:59:53Z","cross_cats_sorted":[],"title_canon_sha256":"a72cc5e51df7c809d6c75b8ddbc1b017626b84799ae6cfd6944c1b75f9d40953","abstract_canon_sha256":"dc30da1ec6f815981a1ec03a0dadfee1c51fb2f61747fdd9e72966ba68cb01bc"},"schema_version":"1.0"},"canonical_sha256":"11d880d168175d4f98debb31586d4de91fed27f834ef4171409354550edaa9d4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:30.886170Z","signature_b64":"mhOg2826Pr7oMKj1ny+sJMbUbrMB52KlBy2NALSsMS+JnR9Lm6M/VRpotHiDxiZ7bedcvRXC85vt0gDetuNfDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"11d880d168175d4f98debb31586d4de91fed27f834ef4171409354550edaa9d4","last_reissued_at":"2026-05-17T23:42:30.885658Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:30.885658Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.03354","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":"2026-05-17T23:42:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZFDkTKqMEA+pB+UYTcMUfzlh0otccK6ESS9e6Leh0TgQVgHJ2TSgmdG8jdXp3Th7iuDLyPnviYsmU6QLAstrBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:35:23.128041Z"},"content_sha256":"8a8903f2e67424c98e1c857d2571264e0cd4cf744453c37aa34268395429a495","schema_version":"1.0","event_id":"sha256:8a8903f2e67424c98e1c857d2571264e0cd4cf744453c37aa34268395429a495"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:CHMIBULIC5OU7GG6XMYVQ3KN5E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electron Spin Coherences in Rare-Earth Optically Excited States for Microwave to Optical Quantum Transducers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Charles W. Thiel, Christoph Simon, Nikolai Lauk, Philip J. T. Woodburn, Philippe Goldner, Rufus L. Cone, Sacha Welinski","submitted_at":"2018-02-09T16:59:53Z","abstract_excerpt":"Efficient and reversible optical to microwave coherent transducers are required to enable entanglement transfer between superconducting qubits and light for quantum networks. Rare-earth-doped crystals that possess narrow optical and spin transitions are a promising way to implement these devices. Current approaches use ground-state electron spin transitions that have coherence lifetimes ($T_2$) often limited by spin flip-flop processes and/or spectral diffusion, even at very low temperatures. Here, we investigate spin coherence in an optically excited state of an Er$^{3+}$:Y$_2$SiO$_5$ crystal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.03354","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":"2026-05-17T23:42:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"izgRRF/tWua5ic9jyoj/XL+iBypIWD1lV8zTFOCi6ddy2iYc6SpK+/l6thFRBwX0LX7gK0Rfcpc91VJjZqvrBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:35:23.128623Z"},"content_sha256":"4e1c1cf850ad1b60076a8c3134f96e1ddb0eda7dacc1c9a5ef4545b885c6f638","schema_version":"1.0","event_id":"sha256:4e1c1cf850ad1b60076a8c3134f96e1ddb0eda7dacc1c9a5ef4545b885c6f638"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CHMIBULIC5OU7GG6XMYVQ3KN5E/bundle.json","state_url":"https://pith.science/pith/CHMIBULIC5OU7GG6XMYVQ3KN5E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CHMIBULIC5OU7GG6XMYVQ3KN5E/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":"2026-05-27T16:35:23Z","links":{"resolver":"https://pith.science/pith/CHMIBULIC5OU7GG6XMYVQ3KN5E","bundle":"https://pith.science/pith/CHMIBULIC5OU7GG6XMYVQ3KN5E/bundle.json","state":"https://pith.science/pith/CHMIBULIC5OU7GG6XMYVQ3KN5E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CHMIBULIC5OU7GG6XMYVQ3KN5E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CHMIBULIC5OU7GG6XMYVQ3KN5E","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":"dc30da1ec6f815981a1ec03a0dadfee1c51fb2f61747fdd9e72966ba68cb01bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-02-09T16:59:53Z","title_canon_sha256":"a72cc5e51df7c809d6c75b8ddbc1b017626b84799ae6cfd6944c1b75f9d40953"},"schema_version":"1.0","source":{"id":"1802.03354","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.03354","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"arxiv_version","alias_value":"1802.03354v2","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.03354","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"pith_short_12","alias_value":"CHMIBULIC5OU","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CHMIBULIC5OU7GG6","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CHMIBULI","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:4e1c1cf850ad1b60076a8c3134f96e1ddb0eda7dacc1c9a5ef4545b885c6f638","target":"graph","created_at":"2026-05-17T23:42:30Z","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":"Efficient and reversible optical to microwave coherent transducers are required to enable entanglement transfer between superconducting qubits and light for quantum networks. Rare-earth-doped crystals that possess narrow optical and spin transitions are a promising way to implement these devices. Current approaches use ground-state electron spin transitions that have coherence lifetimes ($T_2$) often limited by spin flip-flop processes and/or spectral diffusion, even at very low temperatures. Here, we investigate spin coherence in an optically excited state of an Er$^{3+}$:Y$_2$SiO$_5$ crystal","authors_text":"Charles W. Thiel, Christoph Simon, Nikolai Lauk, Philip J. T. Woodburn, Philippe Goldner, Rufus L. Cone, Sacha Welinski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-02-09T16:59:53Z","title":"Electron Spin Coherences in Rare-Earth Optically Excited States for Microwave to Optical Quantum Transducers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.03354","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":"sha256:8a8903f2e67424c98e1c857d2571264e0cd4cf744453c37aa34268395429a495","target":"record","created_at":"2026-05-17T23:42:30Z","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":"dc30da1ec6f815981a1ec03a0dadfee1c51fb2f61747fdd9e72966ba68cb01bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-02-09T16:59:53Z","title_canon_sha256":"a72cc5e51df7c809d6c75b8ddbc1b017626b84799ae6cfd6944c1b75f9d40953"},"schema_version":"1.0","source":{"id":"1802.03354","kind":"arxiv","version":2}},"canonical_sha256":"11d880d168175d4f98debb31586d4de91fed27f834ef4171409354550edaa9d4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"11d880d168175d4f98debb31586d4de91fed27f834ef4171409354550edaa9d4","first_computed_at":"2026-05-17T23:42:30.885658Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:30.885658Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mhOg2826Pr7oMKj1ny+sJMbUbrMB52KlBy2NALSsMS+JnR9Lm6M/VRpotHiDxiZ7bedcvRXC85vt0gDetuNfDQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:30.886170Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.03354","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8a8903f2e67424c98e1c857d2571264e0cd4cf744453c37aa34268395429a495","sha256:4e1c1cf850ad1b60076a8c3134f96e1ddb0eda7dacc1c9a5ef4545b885c6f638"],"state_sha256":"ce6ebefb16c9528100cad7a899e1f7734d852af5391e84298322abc79a8f6923"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x91nkSptaMbNXte0f8AuHfSdgAYDVy9iGF5HL/FRwLWjBkY/Mc8usaR523WgrSJ98I2BxmCuPKZ7wvvA5TtUBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T16:35:23.131254Z","bundle_sha256":"2612dd4ea9864a89e1814096ce44aff3bb69977d48ce728d22c09073b505fb49"}}