{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:BK2LDAV24OOCK2P52XKKJYQJZC","short_pith_number":"pith:BK2LDAV2","canonical_record":{"source":{"id":"1804.09522","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-25T12:39:39Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"0b747f936b4d4e88d4c7d0314648a3b1a4d74eb8965f4e3148b62f0b61bbaa8b","abstract_canon_sha256":"2d0600b97c3d2d232f65bfeecaa48a57dedc37f0ef69af91ada1e0071689e5c9"},"schema_version":"1.0"},"canonical_sha256":"0ab4b182bae39c2569fdd5d4a4e209c89b943c4201b2950cd7c35a9d79154c6d","source":{"kind":"arxiv","id":"1804.09522","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.09522","created_at":"2026-05-18T00:00:08Z"},{"alias_kind":"arxiv_version","alias_value":"1804.09522v1","created_at":"2026-05-18T00:00:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.09522","created_at":"2026-05-18T00:00:08Z"},{"alias_kind":"pith_short_12","alias_value":"BK2LDAV24OOC","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BK2LDAV24OOCK2P5","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BK2LDAV2","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:BK2LDAV24OOCK2P52XKKJYQJZC","target":"record","payload":{"canonical_record":{"source":{"id":"1804.09522","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-25T12:39:39Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"0b747f936b4d4e88d4c7d0314648a3b1a4d74eb8965f4e3148b62f0b61bbaa8b","abstract_canon_sha256":"2d0600b97c3d2d232f65bfeecaa48a57dedc37f0ef69af91ada1e0071689e5c9"},"schema_version":"1.0"},"canonical_sha256":"0ab4b182bae39c2569fdd5d4a4e209c89b943c4201b2950cd7c35a9d79154c6d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:08.631369Z","signature_b64":"YzdQjt9XVj3bH8u+eeQFw6Okmt98Gvz+WuGPttiapis0ypL7JRYrHYWmZACx3+HN6hyHnZyO00SbaOfOKT0EAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0ab4b182bae39c2569fdd5d4a4e209c89b943c4201b2950cd7c35a9d79154c6d","last_reissued_at":"2026-05-18T00:00:08.630779Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:08.630779Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.09522","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":"2026-05-18T00:00:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RogIQK+9eRnfyJk/OST8BqMOlghzRbauH+/Uq2NbFdq/cuYFMtLlwIYnHu6Q1dB2c6AlIxADocLpEBym7eHbCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:09:07.761257Z"},"content_sha256":"643ec07e0abd45d4b44be1782109c0619db8cb9bea44ad15dabf296313119b7d","schema_version":"1.0","event_id":"sha256:643ec07e0abd45d4b44be1782109c0619db8cb9bea44ad15dabf296313119b7d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:BK2LDAV24OOCK2P52XKKJYQJZC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"30 GHz-voltage controlled oscillator operating at 4 K","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"quant-ph","authors_text":"Arne Hollmann, Daniel Jirovec, Dietmar Kissinger, Gunter Fischer, Lars R. Schreiber, Maciej Kucharski","submitted_at":"2018-04-25T12:39:39Z","abstract_excerpt":"Solid-state qubit manipulation and read-out fidelities are reaching fault-tolerance, but quantum error correction requires millions of physical qubits and thus a scalable quantum computer architecture. To solve signal-line bandwidth and fan-out problems, microwave sources required for qubit manipulation might be embedded close to the qubit chip, typically operating at temperatures below 4 K. Here, we perform the first low temperature measurements of a 130 nm BiCMOS based SiGe voltage controlled oscillator. The device maintains its functionality from 300 K to 4 K. We determined the dependence o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.09522","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":"2026-05-18T00:00:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sBH/bZ7ZCyd/uj+BmiX0S+V8dUO24plDMCiEMmbhMrdOEYjiKoq+FsVZDBtkhG97wbu/x44pmd+QKw3gQk0hDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:09:07.761642Z"},"content_sha256":"6bcb6e1ad3b8c8a3127aa8f2dc1bdd3110fc8568cad3ae5bce55fd22ff5f7b13","schema_version":"1.0","event_id":"sha256:6bcb6e1ad3b8c8a3127aa8f2dc1bdd3110fc8568cad3ae5bce55fd22ff5f7b13"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BK2LDAV24OOCK2P52XKKJYQJZC/bundle.json","state_url":"https://pith.science/pith/BK2LDAV24OOCK2P52XKKJYQJZC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BK2LDAV24OOCK2P52XKKJYQJZC/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":"2026-06-02T13:09:07Z","links":{"resolver":"https://pith.science/pith/BK2LDAV24OOCK2P52XKKJYQJZC","bundle":"https://pith.science/pith/BK2LDAV24OOCK2P52XKKJYQJZC/bundle.json","state":"https://pith.science/pith/BK2LDAV24OOCK2P52XKKJYQJZC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BK2LDAV24OOCK2P52XKKJYQJZC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BK2LDAV24OOCK2P52XKKJYQJZC","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":"2d0600b97c3d2d232f65bfeecaa48a57dedc37f0ef69af91ada1e0071689e5c9","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-25T12:39:39Z","title_canon_sha256":"0b747f936b4d4e88d4c7d0314648a3b1a4d74eb8965f4e3148b62f0b61bbaa8b"},"schema_version":"1.0","source":{"id":"1804.09522","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.09522","created_at":"2026-05-18T00:00:08Z"},{"alias_kind":"arxiv_version","alias_value":"1804.09522v1","created_at":"2026-05-18T00:00:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.09522","created_at":"2026-05-18T00:00:08Z"},{"alias_kind":"pith_short_12","alias_value":"BK2LDAV24OOC","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BK2LDAV24OOCK2P5","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BK2LDAV2","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:6bcb6e1ad3b8c8a3127aa8f2dc1bdd3110fc8568cad3ae5bce55fd22ff5f7b13","target":"graph","created_at":"2026-05-18T00:00:08Z","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":"Solid-state qubit manipulation and read-out fidelities are reaching fault-tolerance, but quantum error correction requires millions of physical qubits and thus a scalable quantum computer architecture. To solve signal-line bandwidth and fan-out problems, microwave sources required for qubit manipulation might be embedded close to the qubit chip, typically operating at temperatures below 4 K. Here, we perform the first low temperature measurements of a 130 nm BiCMOS based SiGe voltage controlled oscillator. The device maintains its functionality from 300 K to 4 K. We determined the dependence o","authors_text":"Arne Hollmann, Daniel Jirovec, Dietmar Kissinger, Gunter Fischer, Lars R. Schreiber, Maciej Kucharski","cross_cats":["physics.app-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-25T12:39:39Z","title":"30 GHz-voltage controlled oscillator operating at 4 K"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.09522","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":"sha256:643ec07e0abd45d4b44be1782109c0619db8cb9bea44ad15dabf296313119b7d","target":"record","created_at":"2026-05-18T00:00:08Z","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":"2d0600b97c3d2d232f65bfeecaa48a57dedc37f0ef69af91ada1e0071689e5c9","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-25T12:39:39Z","title_canon_sha256":"0b747f936b4d4e88d4c7d0314648a3b1a4d74eb8965f4e3148b62f0b61bbaa8b"},"schema_version":"1.0","source":{"id":"1804.09522","kind":"arxiv","version":1}},"canonical_sha256":"0ab4b182bae39c2569fdd5d4a4e209c89b943c4201b2950cd7c35a9d79154c6d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0ab4b182bae39c2569fdd5d4a4e209c89b943c4201b2950cd7c35a9d79154c6d","first_computed_at":"2026-05-18T00:00:08.630779Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:08.630779Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YzdQjt9XVj3bH8u+eeQFw6Okmt98Gvz+WuGPttiapis0ypL7JRYrHYWmZACx3+HN6hyHnZyO00SbaOfOKT0EAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:08.631369Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.09522","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:643ec07e0abd45d4b44be1782109c0619db8cb9bea44ad15dabf296313119b7d","sha256:6bcb6e1ad3b8c8a3127aa8f2dc1bdd3110fc8568cad3ae5bce55fd22ff5f7b13"],"state_sha256":"d9ff4cd8af96a68fa1dcc0854e37b66475d9aa38388c374aeda64beca65500ad"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yf+IyYgeAE3QGjPSsYVDsMXc9v4M0QI6HwMzUnRO/MtPPTr+H0ymllS0R+PDK56LPNdgKLebaGDNuO9uVqCoCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T13:09:07.763479Z","bundle_sha256":"c12600195839ca58b412e24b782a3ad1a6ffdcffa1601f402dc790c9a784634b"}}