{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:KHHB2FYEUO6URK2POHAW7RVLIP","short_pith_number":"pith:KHHB2FYE","schema_version":"1.0","canonical_sha256":"51ce1d1704a3bd48ab4f71c16fc6ab43cc83fb0837a25f5d7650346fc3dff3d1","source":{"kind":"arxiv","id":"1105.4642","version":1},"attestation_state":"computed","paper":{"title":"Loss and decoherence due to stray infrared light in superconducting quantum circuits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.supr-con","quant-ph"],"primary_cat":"cond-mat.mes-hall","authors_text":"A. N. Cleland, D. Sank, E. Lucero, H. Wang, J. J. A. Baselmans, J. Kelly, John M. Martinis, J. Wenner, J. Zhao, M. Lenander, M. Mariantoni, P. O'Malley, R. Barends, R. C. Bialczak, T. C. White, Y. Chen, Y. Yin","submitted_at":"2011-05-23T22:02:36Z","abstract_excerpt":"We find that stray infrared light from the 4 K stage in a cryostat can cause significant loss in superconducting resonators and qubits. For devices shielded in only a metal box, we measured resonators with quality factors Q = 10^5 and qubits with energy relaxation times T_1=120 ns, consistent with a stray light-induced quasiparticle density of 170-230 \\mu m^{-3}. By adding a second black shield at the sample temperature, we found about an order of magnitude improvement in performance and no sensitivity to the 4 K radiation. We also tested various shielding methods, implying a lower limit of Q "},"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":"1105.4642","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2011-05-23T22:02:36Z","cross_cats_sorted":["cond-mat.supr-con","quant-ph"],"title_canon_sha256":"4649abcc9eea3402e80a899bed7d7493df50facf616388b9528104725a4de64d","abstract_canon_sha256":"9ba0a2ed8864aa574bd45b1c77dfbb34c0b0f6a7754402160eed1ce6a1db27ec"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:13:15.814702Z","signature_b64":"M2Z6vwrB/vxp+Y0o8dmAV2qExduwNIW6OoauUzw4US8Gl9igoPfCCF/2a9+QFH+ODHWKl+sAyjaxBxg3q5yCDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"51ce1d1704a3bd48ab4f71c16fc6ab43cc83fb0837a25f5d7650346fc3dff3d1","last_reissued_at":"2026-05-18T04:13:15.814255Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:13:15.814255Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Loss and decoherence due to stray infrared light in superconducting quantum circuits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.supr-con","quant-ph"],"primary_cat":"cond-mat.mes-hall","authors_text":"A. N. Cleland, D. Sank, E. Lucero, H. Wang, J. J. A. Baselmans, J. Kelly, John M. Martinis, J. Wenner, J. Zhao, M. Lenander, M. Mariantoni, P. O'Malley, R. Barends, R. C. Bialczak, T. C. White, Y. Chen, Y. Yin","submitted_at":"2011-05-23T22:02:36Z","abstract_excerpt":"We find that stray infrared light from the 4 K stage in a cryostat can cause significant loss in superconducting resonators and qubits. For devices shielded in only a metal box, we measured resonators with quality factors Q = 10^5 and qubits with energy relaxation times T_1=120 ns, consistent with a stray light-induced quasiparticle density of 170-230 \\mu m^{-3}. By adding a second black shield at the sample temperature, we found about an order of magnitude improvement in performance and no sensitivity to the 4 K radiation. We also tested various shielding methods, implying a lower limit of Q "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.4642","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1105.4642","created_at":"2026-05-18T04:13:15.814324+00:00"},{"alias_kind":"arxiv_version","alias_value":"1105.4642v1","created_at":"2026-05-18T04:13:15.814324+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.4642","created_at":"2026-05-18T04:13:15.814324+00:00"},{"alias_kind":"pith_short_12","alias_value":"KHHB2FYEUO6U","created_at":"2026-05-18T12:26:32.869790+00:00"},{"alias_kind":"pith_short_16","alias_value":"KHHB2FYEUO6URK2P","created_at":"2026-05-18T12:26:32.869790+00:00"},{"alias_kind":"pith_short_8","alias_value":"KHHB2FYE","created_at":"2026-05-18T12:26:32.869790+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/KHHB2FYEUO6URK2POHAW7RVLIP","json":"https://pith.science/pith/KHHB2FYEUO6URK2POHAW7RVLIP.json","graph_json":"https://pith.science/api/pith-number/KHHB2FYEUO6URK2POHAW7RVLIP/graph.json","events_json":"https://pith.science/api/pith-number/KHHB2FYEUO6URK2POHAW7RVLIP/events.json","paper":"https://pith.science/paper/KHHB2FYE"},"agent_actions":{"view_html":"https://pith.science/pith/KHHB2FYEUO6URK2POHAW7RVLIP","download_json":"https://pith.science/pith/KHHB2FYEUO6URK2POHAW7RVLIP.json","view_paper":"https://pith.science/paper/KHHB2FYE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1105.4642&json=true","fetch_graph":"https://pith.science/api/pith-number/KHHB2FYEUO6URK2POHAW7RVLIP/graph.json","fetch_events":"https://pith.science/api/pith-number/KHHB2FYEUO6URK2POHAW7RVLIP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KHHB2FYEUO6URK2POHAW7RVLIP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KHHB2FYEUO6URK2POHAW7RVLIP/action/storage_attestation","attest_author":"https://pith.science/pith/KHHB2FYEUO6URK2POHAW7RVLIP/action/author_attestation","sign_citation":"https://pith.science/pith/KHHB2FYEUO6URK2POHAW7RVLIP/action/citation_signature","submit_replication":"https://pith.science/pith/KHHB2FYEUO6URK2POHAW7RVLIP/action/replication_record"}},"created_at":"2026-05-18T04:13:15.814324+00:00","updated_at":"2026-05-18T04:13:15.814324+00:00"}