{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:R3NDBHYAHKDLNR7WT42U6DPWJN","short_pith_number":"pith:R3NDBHYA","canonical_record":{"source":{"id":"1901.04570","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-01-14T21:23:35Z","cross_cats_sorted":[],"title_canon_sha256":"cfd08511ccf9eebcf604aebfa87b2f086fdc44812cbee878882a4e57648d3deb","abstract_canon_sha256":"84f9e2ddc3cf4865e5526321872dff0518bdb163b9a600b46a8ba86349c4035c"},"schema_version":"1.0"},"canonical_sha256":"8eda309f003a86b6c7f69f354f0df64b782890a92d9078a21f86d704d33be6f4","source":{"kind":"arxiv","id":"1901.04570","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.04570","created_at":"2026-05-17T23:56:22Z"},{"alias_kind":"arxiv_version","alias_value":"1901.04570v1","created_at":"2026-05-17T23:56:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.04570","created_at":"2026-05-17T23:56:22Z"},{"alias_kind":"pith_short_12","alias_value":"R3NDBHYAHKDL","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"R3NDBHYAHKDLNR7W","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"R3NDBHYA","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:R3NDBHYAHKDLNR7WT42U6DPWJN","target":"record","payload":{"canonical_record":{"source":{"id":"1901.04570","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-01-14T21:23:35Z","cross_cats_sorted":[],"title_canon_sha256":"cfd08511ccf9eebcf604aebfa87b2f086fdc44812cbee878882a4e57648d3deb","abstract_canon_sha256":"84f9e2ddc3cf4865e5526321872dff0518bdb163b9a600b46a8ba86349c4035c"},"schema_version":"1.0"},"canonical_sha256":"8eda309f003a86b6c7f69f354f0df64b782890a92d9078a21f86d704d33be6f4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:22.376361Z","signature_b64":"hvdSYW8ICrrZztMdngYbVzQCZU5be6Rco37ZvigQY8Q44lScF0g/1RASvCWIALnQKlGEUElGdbgrOQRlxBY1Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8eda309f003a86b6c7f69f354f0df64b782890a92d9078a21f86d704d33be6f4","last_reissued_at":"2026-05-17T23:56:22.375805Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:22.375805Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.04570","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":"2026-05-17T23:56:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cDQD8r09Ap+qTWAcSHK85DPx/tsH+OLFPhTjJxICtxja69VDhPH3B013i/FazKKVyJc1lGYnFMrCzNKS3isbBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:56:17.296636Z"},"content_sha256":"51c1e8f2b09e5b929fde162044f82b1c3787362d4efda97687cc4477272390ee","schema_version":"1.0","event_id":"sha256:51c1e8f2b09e5b929fde162044f82b1c3787362d4efda97687cc4477272390ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:R3NDBHYAHKDLNR7WT42U6DPWJN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Single-Shot Readout Performance of Two Heterojunction-Bipolar-Transistor Amplification Circuits at Millikelvin Temperatures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"A. M. Mounce, C. Bureau-Oxton, D. M. Campbell, D. R. Ward, J. M. Anderson, J. R. Wendt, M. J. Curry, M. P. Lilly, M. Rudolph, M. S. Carroll, P. A. Sharma, P. Harvey-Collard, R. M. Jock, S. M. Carr, T. D. England","submitted_at":"2019-01-14T21:23:35Z","abstract_excerpt":"High-fidelity single-shot readout of spin qubits requires distinguishing states much faster than the T1 time of the spin state. One approach to improving readout fidelity and bandwidth (BW) is cryogenic amplification, where the signal from the qubit is amplified before noise sources are introduced and room-temperature amplifiers can operate at lower gain and higher BW. We compare the performance of two cryogenic amplification circuits: a current-biased heterojunction bipolar transistor circuit (CB-HBT), and an AC-coupled HBT circuit (AC-HBT). Both circuits are mounted on the mixing-chamber sta"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.04570","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":"2026-05-17T23:56:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"REVmRo0o9rdIANZJ69QCMhFSpEL7KKTlGmU08bPBk5IhTzZ0ewdDUKdX2FPnBZd6j47IPfDo682tDLEkKzqMBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:56:17.297338Z"},"content_sha256":"892d30ac2ec9de256cf6a9e6fe5824db13773b551a0a3873131171cf28b52a8d","schema_version":"1.0","event_id":"sha256:892d30ac2ec9de256cf6a9e6fe5824db13773b551a0a3873131171cf28b52a8d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R3NDBHYAHKDLNR7WT42U6DPWJN/bundle.json","state_url":"https://pith.science/pith/R3NDBHYAHKDLNR7WT42U6DPWJN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R3NDBHYAHKDLNR7WT42U6DPWJN/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":"2026-05-27T20:56:17Z","links":{"resolver":"https://pith.science/pith/R3NDBHYAHKDLNR7WT42U6DPWJN","bundle":"https://pith.science/pith/R3NDBHYAHKDLNR7WT42U6DPWJN/bundle.json","state":"https://pith.science/pith/R3NDBHYAHKDLNR7WT42U6DPWJN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R3NDBHYAHKDLNR7WT42U6DPWJN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:R3NDBHYAHKDLNR7WT42U6DPWJN","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":"84f9e2ddc3cf4865e5526321872dff0518bdb163b9a600b46a8ba86349c4035c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-01-14T21:23:35Z","title_canon_sha256":"cfd08511ccf9eebcf604aebfa87b2f086fdc44812cbee878882a4e57648d3deb"},"schema_version":"1.0","source":{"id":"1901.04570","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.04570","created_at":"2026-05-17T23:56:22Z"},{"alias_kind":"arxiv_version","alias_value":"1901.04570v1","created_at":"2026-05-17T23:56:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.04570","created_at":"2026-05-17T23:56:22Z"},{"alias_kind":"pith_short_12","alias_value":"R3NDBHYAHKDL","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"R3NDBHYAHKDLNR7W","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"R3NDBHYA","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:892d30ac2ec9de256cf6a9e6fe5824db13773b551a0a3873131171cf28b52a8d","target":"graph","created_at":"2026-05-17T23:56:22Z","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":"High-fidelity single-shot readout of spin qubits requires distinguishing states much faster than the T1 time of the spin state. One approach to improving readout fidelity and bandwidth (BW) is cryogenic amplification, where the signal from the qubit is amplified before noise sources are introduced and room-temperature amplifiers can operate at lower gain and higher BW. We compare the performance of two cryogenic amplification circuits: a current-biased heterojunction bipolar transistor circuit (CB-HBT), and an AC-coupled HBT circuit (AC-HBT). Both circuits are mounted on the mixing-chamber sta","authors_text":"A. M. Mounce, C. Bureau-Oxton, D. M. Campbell, D. R. Ward, J. M. Anderson, J. R. Wendt, M. J. Curry, M. P. Lilly, M. Rudolph, M. S. Carroll, P. A. Sharma, P. Harvey-Collard, R. M. Jock, S. M. Carr, T. D. England","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-01-14T21:23:35Z","title":"Single-Shot Readout Performance of Two Heterojunction-Bipolar-Transistor Amplification Circuits at Millikelvin Temperatures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.04570","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":"sha256:51c1e8f2b09e5b929fde162044f82b1c3787362d4efda97687cc4477272390ee","target":"record","created_at":"2026-05-17T23:56:22Z","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":"84f9e2ddc3cf4865e5526321872dff0518bdb163b9a600b46a8ba86349c4035c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-01-14T21:23:35Z","title_canon_sha256":"cfd08511ccf9eebcf604aebfa87b2f086fdc44812cbee878882a4e57648d3deb"},"schema_version":"1.0","source":{"id":"1901.04570","kind":"arxiv","version":1}},"canonical_sha256":"8eda309f003a86b6c7f69f354f0df64b782890a92d9078a21f86d704d33be6f4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8eda309f003a86b6c7f69f354f0df64b782890a92d9078a21f86d704d33be6f4","first_computed_at":"2026-05-17T23:56:22.375805Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:22.375805Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hvdSYW8ICrrZztMdngYbVzQCZU5be6Rco37ZvigQY8Q44lScF0g/1RASvCWIALnQKlGEUElGdbgrOQRlxBY1Cg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:22.376361Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.04570","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:51c1e8f2b09e5b929fde162044f82b1c3787362d4efda97687cc4477272390ee","sha256:892d30ac2ec9de256cf6a9e6fe5824db13773b551a0a3873131171cf28b52a8d"],"state_sha256":"bd915ffcbb5caf3ea3c9121f9ccdda0de6cc0b5b438209dad197817611636100"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JToY+IEWHs45obEpxKiFp+2txv/qFHZGzzNo9E3AnICg4ZvZeyKKKSe2qh+V++Gd+biLipxlqoOfDILuvwQ3AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T20:56:17.300829Z","bundle_sha256":"89f8223d36ae1655218dab6e5c62cedb9750407732521cee52ac52db3f984000"}}