{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:NCLZ3VJLWCO4ZG3CFJ6N5H2OFA","short_pith_number":"pith:NCLZ3VJL","canonical_record":{"source":{"id":"2302.09819","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2023-02-20T07:51:04Z","cross_cats_sorted":[],"title_canon_sha256":"160c194fc87f60dbe575b69553a173856164779379460531f43c173c4bafde2c","abstract_canon_sha256":"fb5b2f1643ce8587aaad722f32827e25b27c9173016d85ade914f30383db6e68"},"schema_version":"1.0"},"canonical_sha256":"68979dd52bb09dcc9b622a7cde9f4e281bd5156f09e55df498eda449e6fb8827","source":{"kind":"arxiv","id":"2302.09819","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.09819","created_at":"2026-07-05T07:19:18Z"},{"alias_kind":"arxiv_version","alias_value":"2302.09819v2","created_at":"2026-07-05T07:19:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.09819","created_at":"2026-07-05T07:19:18Z"},{"alias_kind":"pith_short_12","alias_value":"NCLZ3VJLWCO4","created_at":"2026-07-05T07:19:18Z"},{"alias_kind":"pith_short_16","alias_value":"NCLZ3VJLWCO4ZG3C","created_at":"2026-07-05T07:19:18Z"},{"alias_kind":"pith_short_8","alias_value":"NCLZ3VJL","created_at":"2026-07-05T07:19:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:NCLZ3VJLWCO4ZG3CFJ6N5H2OFA","target":"record","payload":{"canonical_record":{"source":{"id":"2302.09819","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2023-02-20T07:51:04Z","cross_cats_sorted":[],"title_canon_sha256":"160c194fc87f60dbe575b69553a173856164779379460531f43c173c4bafde2c","abstract_canon_sha256":"fb5b2f1643ce8587aaad722f32827e25b27c9173016d85ade914f30383db6e68"},"schema_version":"1.0"},"canonical_sha256":"68979dd52bb09dcc9b622a7cde9f4e281bd5156f09e55df498eda449e6fb8827","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:19:18.606818Z","signature_b64":"z/QyDbCkMSsG+VVLxVcGmioY4dSSvJcr18hHykJ7T+mlRvO4pZ6/HXl/2TeaoyzWS1sv04C0f4OgvfCTHV1BDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"68979dd52bb09dcc9b622a7cde9f4e281bd5156f09e55df498eda449e6fb8827","last_reissued_at":"2026-07-05T07:19:18.606289Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:19:18.606289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2302.09819","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":"2026-07-05T07:19:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EEXeC/KKnMNfPsgHuFSzBo1H3Eu8EvFjGRp5fUgMsolbTjkwog2/Dhxh3cWVr9EPqNTjZ3lyKvfDHHwgW0frAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T09:35:02.030615Z"},"content_sha256":"27f481af2fa2caf75360debab0cf3b06e49db24d1eae680dd0fa7b7f36abb43f","schema_version":"1.0","event_id":"sha256:27f481af2fa2caf75360debab0cf3b06e49db24d1eae680dd0fa7b7f36abb43f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:NCLZ3VJLWCO4ZG3CFJ6N5H2OFA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Coupler microwave-activated controlled phase gate on fluxonium qubits","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alexander A. Grigorev, Anastasiya A. Pishchimova, Dmitry O. Moskalev, Evgeniy V. Zikiy, Grigoriy S. Mazhorin, Ilya A. Rodionov, Ilya A. Simakov, Ilya N. Moskalenko, Ilya S. Besedin, Nikita S. Smirnov, Nikolay N. Abramov","submitted_at":"2023-02-20T07:51:04Z","abstract_excerpt":"Tunable couplers have recently become one of the most powerful tools for implementing two-qubit gates between superconducting qubits. A tunable coupler typically includes a nonlinear element, such as a SQUID, which is used to tune the resonance frequency of an LC circuit connecting two qubits. Here we propose a complimentary approach where instead of tuning the resonance frequency of the tunable coupler by applying a quasistatic control signal, we excite by microwave the degree of freedom associated with the coupler itself. Due to strong effective longitudinal coupling between the coupler and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.09819","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2302.09819/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T07:19:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C5Ko8+QztYS6bAqNKrn0+yZbQIdfiuzKmEqAdEvwYT2e0jpZHTQ2dWDEQVuSQKVjj8CgCyuGFUipnRT/tlKGCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T09:35:02.031510Z"},"content_sha256":"76e9659b85c6980b41e18a6a47c0976abddea17ce9c6678adab3353cc384c330","schema_version":"1.0","event_id":"sha256:76e9659b85c6980b41e18a6a47c0976abddea17ce9c6678adab3353cc384c330"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NCLZ3VJLWCO4ZG3CFJ6N5H2OFA/bundle.json","state_url":"https://pith.science/pith/NCLZ3VJLWCO4ZG3CFJ6N5H2OFA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NCLZ3VJLWCO4ZG3CFJ6N5H2OFA/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":"2026-08-21T09:35:02Z","links":{"resolver":"https://pith.science/pith/NCLZ3VJLWCO4ZG3CFJ6N5H2OFA","bundle":"https://pith.science/pith/NCLZ3VJLWCO4ZG3CFJ6N5H2OFA/bundle.json","state":"https://pith.science/pith/NCLZ3VJLWCO4ZG3CFJ6N5H2OFA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NCLZ3VJLWCO4ZG3CFJ6N5H2OFA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:NCLZ3VJLWCO4ZG3CFJ6N5H2OFA","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":"fb5b2f1643ce8587aaad722f32827e25b27c9173016d85ade914f30383db6e68","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2023-02-20T07:51:04Z","title_canon_sha256":"160c194fc87f60dbe575b69553a173856164779379460531f43c173c4bafde2c"},"schema_version":"1.0","source":{"id":"2302.09819","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.09819","created_at":"2026-07-05T07:19:18Z"},{"alias_kind":"arxiv_version","alias_value":"2302.09819v2","created_at":"2026-07-05T07:19:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.09819","created_at":"2026-07-05T07:19:18Z"},{"alias_kind":"pith_short_12","alias_value":"NCLZ3VJLWCO4","created_at":"2026-07-05T07:19:18Z"},{"alias_kind":"pith_short_16","alias_value":"NCLZ3VJLWCO4ZG3C","created_at":"2026-07-05T07:19:18Z"},{"alias_kind":"pith_short_8","alias_value":"NCLZ3VJL","created_at":"2026-07-05T07:19:18Z"}],"graph_snapshots":[{"event_id":"sha256:76e9659b85c6980b41e18a6a47c0976abddea17ce9c6678adab3353cc384c330","target":"graph","created_at":"2026-07-05T07:19:18Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2302.09819/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Tunable couplers have recently become one of the most powerful tools for implementing two-qubit gates between superconducting qubits. A tunable coupler typically includes a nonlinear element, such as a SQUID, which is used to tune the resonance frequency of an LC circuit connecting two qubits. Here we propose a complimentary approach where instead of tuning the resonance frequency of the tunable coupler by applying a quasistatic control signal, we excite by microwave the degree of freedom associated with the coupler itself. Due to strong effective longitudinal coupling between the coupler and ","authors_text":"Alexander A. Grigorev, Anastasiya A. Pishchimova, Dmitry O. Moskalev, Evgeniy V. Zikiy, Grigoriy S. Mazhorin, Ilya A. Rodionov, Ilya A. Simakov, Ilya N. Moskalenko, Ilya S. Besedin, Nikita S. Smirnov, Nikolay N. Abramov","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2023-02-20T07:51:04Z","title":"Coupler microwave-activated controlled phase gate on fluxonium qubits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.09819","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":"sha256:27f481af2fa2caf75360debab0cf3b06e49db24d1eae680dd0fa7b7f36abb43f","target":"record","created_at":"2026-07-05T07:19:18Z","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":"fb5b2f1643ce8587aaad722f32827e25b27c9173016d85ade914f30383db6e68","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2023-02-20T07:51:04Z","title_canon_sha256":"160c194fc87f60dbe575b69553a173856164779379460531f43c173c4bafde2c"},"schema_version":"1.0","source":{"id":"2302.09819","kind":"arxiv","version":2}},"canonical_sha256":"68979dd52bb09dcc9b622a7cde9f4e281bd5156f09e55df498eda449e6fb8827","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"68979dd52bb09dcc9b622a7cde9f4e281bd5156f09e55df498eda449e6fb8827","first_computed_at":"2026-07-05T07:19:18.606289Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:19:18.606289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"z/QyDbCkMSsG+VVLxVcGmioY4dSSvJcr18hHykJ7T+mlRvO4pZ6/HXl/2TeaoyzWS1sv04C0f4OgvfCTHV1BDw==","signature_status":"signed_v1","signed_at":"2026-07-05T07:19:18.606818Z","signed_message":"canonical_sha256_bytes"},"source_id":"2302.09819","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:27f481af2fa2caf75360debab0cf3b06e49db24d1eae680dd0fa7b7f36abb43f","sha256:76e9659b85c6980b41e18a6a47c0976abddea17ce9c6678adab3353cc384c330"],"state_sha256":"97f720493bc3521e0db6fde41c67489c75a4a817a6982620a70ca37a487ec167"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZGihyvdIRAYCD45Mn+YlLaMtvvXc2nY7CybvOKbJZVyEGRV3nWZeXf28PIc5mvyQuU8q/rkiBC50MGZDYlq2Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T09:35:02.058059Z","bundle_sha256":"943f19304d7f00a08a3a3f8fca5fd0ca72e8569e989ba0dd55f47a36cd0efce4"}}