{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:75IEGINYMLN4KG7JK3DVRG3Z2E","short_pith_number":"pith:75IEGINY","schema_version":"1.0","canonical_sha256":"ff504321b862dbc51be956c7589b79d101111e8b8b8507e9df3dfea701bcd4d0","source":{"kind":"arxiv","id":"1508.07780","version":2},"attestation_state":"computed","paper":{"title":"Closing a quantum feedback loop inside a cryostat: Autonomous state preparation and long-time memory of a superconducting qubit","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Benjamin J. Chapman, Christian Kraglund Andersen, Joseph Kerckhoff, Klaus M{\\o}lmer, Konrad W. Lehnert","submitted_at":"2015-08-31T12:19:18Z","abstract_excerpt":"We propose to use a cryogenic nonlinear resonator for the projective readout, classical memory, and feedback for a superconducting qubit. This approach sidesteps many of the inefficiencies inherent in two-way communication between temperature stages in typical systems with room temperature controllers, and avoids increasing the cryogenic heat load. This controller may find a broad range of uses in multi-qubit systems, but here we analyze two specific demonstrative cases in single qubit-control. In the first case, the nonlinear controller is used to initialize the qubit in a definite eigenstate"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1508.07780","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-08-31T12:19:18Z","cross_cats_sorted":[],"title_canon_sha256":"657fda33f0197b9109840f83f98e83c0eb1d7f99300ff74b0c6961483ed21253","abstract_canon_sha256":"b93efce20345707a977e9cfb410a9baf58b1c16e1349cd46e0cfb36dfde72f8d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:31.356205Z","signature_b64":"jgxVjHB3Hf66otiUs9w3LLjXYtfs8WzEYFqKiU1M4ApR65/3ghseQc++xW38IZrxdmbcBYkkrRysXjF9Zq7LBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ff504321b862dbc51be956c7589b79d101111e8b8b8507e9df3dfea701bcd4d0","last_reissued_at":"2026-05-18T01:21:31.355405Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:31.355405Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Closing a quantum feedback loop inside a cryostat: Autonomous state preparation and long-time memory of a superconducting qubit","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Benjamin J. Chapman, Christian Kraglund Andersen, Joseph Kerckhoff, Klaus M{\\o}lmer, Konrad W. Lehnert","submitted_at":"2015-08-31T12:19:18Z","abstract_excerpt":"We propose to use a cryogenic nonlinear resonator for the projective readout, classical memory, and feedback for a superconducting qubit. This approach sidesteps many of the inefficiencies inherent in two-way communication between temperature stages in typical systems with room temperature controllers, and avoids increasing the cryogenic heat load. This controller may find a broad range of uses in multi-qubit systems, but here we analyze two specific demonstrative cases in single qubit-control. In the first case, the nonlinear controller is used to initialize the qubit in a definite eigenstate"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.07780","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1508.07780","created_at":"2026-05-18T01:21:31.355549+00:00"},{"alias_kind":"arxiv_version","alias_value":"1508.07780v2","created_at":"2026-05-18T01:21:31.355549+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.07780","created_at":"2026-05-18T01:21:31.355549+00:00"},{"alias_kind":"pith_short_12","alias_value":"75IEGINYMLN4","created_at":"2026-05-18T12:29:07.941421+00:00"},{"alias_kind":"pith_short_16","alias_value":"75IEGINYMLN4KG7J","created_at":"2026-05-18T12:29:07.941421+00:00"},{"alias_kind":"pith_short_8","alias_value":"75IEGINY","created_at":"2026-05-18T12:29:07.941421+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/75IEGINYMLN4KG7JK3DVRG3Z2E","json":"https://pith.science/pith/75IEGINYMLN4KG7JK3DVRG3Z2E.json","graph_json":"https://pith.science/api/pith-number/75IEGINYMLN4KG7JK3DVRG3Z2E/graph.json","events_json":"https://pith.science/api/pith-number/75IEGINYMLN4KG7JK3DVRG3Z2E/events.json","paper":"https://pith.science/paper/75IEGINY"},"agent_actions":{"view_html":"https://pith.science/pith/75IEGINYMLN4KG7JK3DVRG3Z2E","download_json":"https://pith.science/pith/75IEGINYMLN4KG7JK3DVRG3Z2E.json","view_paper":"https://pith.science/paper/75IEGINY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1508.07780&json=true","fetch_graph":"https://pith.science/api/pith-number/75IEGINYMLN4KG7JK3DVRG3Z2E/graph.json","fetch_events":"https://pith.science/api/pith-number/75IEGINYMLN4KG7JK3DVRG3Z2E/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/75IEGINYMLN4KG7JK3DVRG3Z2E/action/timestamp_anchor","attest_storage":"https://pith.science/pith/75IEGINYMLN4KG7JK3DVRG3Z2E/action/storage_attestation","attest_author":"https://pith.science/pith/75IEGINYMLN4KG7JK3DVRG3Z2E/action/author_attestation","sign_citation":"https://pith.science/pith/75IEGINYMLN4KG7JK3DVRG3Z2E/action/citation_signature","submit_replication":"https://pith.science/pith/75IEGINYMLN4KG7JK3DVRG3Z2E/action/replication_record"}},"created_at":"2026-05-18T01:21:31.355549+00:00","updated_at":"2026-05-18T01:21:31.355549+00:00"}