{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:ZCTUE4V4PJX4IBI36QDR4QVWK6","short_pith_number":"pith:ZCTUE4V4","canonical_record":{"source":{"id":"0804.4186","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-04-25T22:34:12Z","cross_cats_sorted":[],"title_canon_sha256":"471fc9015fbd7bd3da463487bcd2e80ba51a36d37ceb7bf8f7b43dd00653d4d2","abstract_canon_sha256":"03a3931c048a3bfddf0aea04f87d5c52ec71b68e34674863782378e10cd9e0cb"},"schema_version":"1.0"},"canonical_sha256":"c8a74272bc7a6fc4051bf4071e42b657b6d691706f4a216f5c6c05e6d97e929d","source":{"kind":"arxiv","id":"0804.4186","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.4186","created_at":"2026-07-04T17:10:31Z"},{"alias_kind":"arxiv_version","alias_value":"0804.4186v1","created_at":"2026-07-04T17:10:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.4186","created_at":"2026-07-04T17:10:31Z"},{"alias_kind":"pith_short_12","alias_value":"ZCTUE4V4PJX4","created_at":"2026-07-04T17:10:31Z"},{"alias_kind":"pith_short_16","alias_value":"ZCTUE4V4PJX4IBI3","created_at":"2026-07-04T17:10:31Z"},{"alias_kind":"pith_short_8","alias_value":"ZCTUE4V4","created_at":"2026-07-04T17:10:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:ZCTUE4V4PJX4IBI36QDR4QVWK6","target":"record","payload":{"canonical_record":{"source":{"id":"0804.4186","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-04-25T22:34:12Z","cross_cats_sorted":[],"title_canon_sha256":"471fc9015fbd7bd3da463487bcd2e80ba51a36d37ceb7bf8f7b43dd00653d4d2","abstract_canon_sha256":"03a3931c048a3bfddf0aea04f87d5c52ec71b68e34674863782378e10cd9e0cb"},"schema_version":"1.0"},"canonical_sha256":"c8a74272bc7a6fc4051bf4071e42b657b6d691706f4a216f5c6c05e6d97e929d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:10:31.623744Z","signature_b64":"XQe2140A16Ua0/o+93swdBpi6VBzonztHC3Q8GKRAWgVdyjJwvKF8l42+GQLY3QJlrh/ze4jgloZ0lKrCMOiCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c8a74272bc7a6fc4051bf4071e42b657b6d691706f4a216f5c6c05e6d97e929d","last_reissued_at":"2026-07-04T17:10:31.623274Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:10:31.623274Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0804.4186","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":"2026-07-04T17:10:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OHE8UaMk5GR4JOgq4ZGRr4aqtq/qIHWTQ+OMm9QV1OYbOfNRhmHLE6LHeB7cyPwxMuyywy8NuTNUDNPhxsJXAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:26:23.820155Z"},"content_sha256":"8768fd5a309ee4fe5652bbd307ceef5eb9fe23327f7bb6c3e28f9ba2d2429422","schema_version":"1.0","event_id":"sha256:8768fd5a309ee4fe5652bbd307ceef5eb9fe23327f7bb6c3e28f9ba2d2429422"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:ZCTUE4V4PJX4IBI36QDR4QVWK6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Generation of squeezed states of microwave radiation in a superconducting resonant circuit","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A.M. Zagoskin, E. Il'ichev, Franco Nori, Jeff Young, M. W. McCutcheon","submitted_at":"2008-04-25T22:34:12Z","abstract_excerpt":"High-quality superconducting oscillators have been successfully used for quantum control and readout devices in conjunction with superconducting qubits. Also, it is well known that squeezed states can improve the accuracy of measurements to subquantum, or at least subthermal, levels. Here we show theoretically how to produce squeezed states of microwave radiation in a superconducting oscillator with tunable parameters. The circuit impedance, and thus the resonance frequency, can be changed by controlling the state of an RF SQUID inductively coupled to the oscillator. By repeatedly shifting the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.4186","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0804.4186/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":"2026-07-04T17:10:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/902iGoRHqQehhaQHhJOqrHfkEuO/tXej9sLsvrrxuOO8HD8bodsAcRSRUPEqYmV1WQDFAcMJ/bM+reCmxvJCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:26:23.821157Z"},"content_sha256":"53d61ceb4b08e5e29f62293c045bb342e2d97a6a1eac6787b2458b3a3816215e","schema_version":"1.0","event_id":"sha256:53d61ceb4b08e5e29f62293c045bb342e2d97a6a1eac6787b2458b3a3816215e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZCTUE4V4PJX4IBI36QDR4QVWK6/bundle.json","state_url":"https://pith.science/pith/ZCTUE4V4PJX4IBI36QDR4QVWK6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZCTUE4V4PJX4IBI36QDR4QVWK6/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":"2026-08-03T16:26:23Z","links":{"resolver":"https://pith.science/pith/ZCTUE4V4PJX4IBI36QDR4QVWK6","bundle":"https://pith.science/pith/ZCTUE4V4PJX4IBI36QDR4QVWK6/bundle.json","state":"https://pith.science/pith/ZCTUE4V4PJX4IBI36QDR4QVWK6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZCTUE4V4PJX4IBI36QDR4QVWK6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:ZCTUE4V4PJX4IBI36QDR4QVWK6","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":"03a3931c048a3bfddf0aea04f87d5c52ec71b68e34674863782378e10cd9e0cb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-04-25T22:34:12Z","title_canon_sha256":"471fc9015fbd7bd3da463487bcd2e80ba51a36d37ceb7bf8f7b43dd00653d4d2"},"schema_version":"1.0","source":{"id":"0804.4186","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.4186","created_at":"2026-07-04T17:10:31Z"},{"alias_kind":"arxiv_version","alias_value":"0804.4186v1","created_at":"2026-07-04T17:10:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.4186","created_at":"2026-07-04T17:10:31Z"},{"alias_kind":"pith_short_12","alias_value":"ZCTUE4V4PJX4","created_at":"2026-07-04T17:10:31Z"},{"alias_kind":"pith_short_16","alias_value":"ZCTUE4V4PJX4IBI3","created_at":"2026-07-04T17:10:31Z"},{"alias_kind":"pith_short_8","alias_value":"ZCTUE4V4","created_at":"2026-07-04T17:10:31Z"}],"graph_snapshots":[{"event_id":"sha256:53d61ceb4b08e5e29f62293c045bb342e2d97a6a1eac6787b2458b3a3816215e","target":"graph","created_at":"2026-07-04T17:10:31Z","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/0804.4186/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"High-quality superconducting oscillators have been successfully used for quantum control and readout devices in conjunction with superconducting qubits. Also, it is well known that squeezed states can improve the accuracy of measurements to subquantum, or at least subthermal, levels. Here we show theoretically how to produce squeezed states of microwave radiation in a superconducting oscillator with tunable parameters. The circuit impedance, and thus the resonance frequency, can be changed by controlling the state of an RF SQUID inductively coupled to the oscillator. By repeatedly shifting the","authors_text":"A.M. Zagoskin, E. Il'ichev, Franco Nori, Jeff Young, M. W. McCutcheon","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-04-25T22:34:12Z","title":"Generation of squeezed states of microwave radiation in a superconducting resonant circuit"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.4186","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":"sha256:8768fd5a309ee4fe5652bbd307ceef5eb9fe23327f7bb6c3e28f9ba2d2429422","target":"record","created_at":"2026-07-04T17:10:31Z","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":"03a3931c048a3bfddf0aea04f87d5c52ec71b68e34674863782378e10cd9e0cb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-04-25T22:34:12Z","title_canon_sha256":"471fc9015fbd7bd3da463487bcd2e80ba51a36d37ceb7bf8f7b43dd00653d4d2"},"schema_version":"1.0","source":{"id":"0804.4186","kind":"arxiv","version":1}},"canonical_sha256":"c8a74272bc7a6fc4051bf4071e42b657b6d691706f4a216f5c6c05e6d97e929d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c8a74272bc7a6fc4051bf4071e42b657b6d691706f4a216f5c6c05e6d97e929d","first_computed_at":"2026-07-04T17:10:31.623274Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:10:31.623274Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XQe2140A16Ua0/o+93swdBpi6VBzonztHC3Q8GKRAWgVdyjJwvKF8l42+GQLY3QJlrh/ze4jgloZ0lKrCMOiCg==","signature_status":"signed_v1","signed_at":"2026-07-04T17:10:31.623744Z","signed_message":"canonical_sha256_bytes"},"source_id":"0804.4186","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8768fd5a309ee4fe5652bbd307ceef5eb9fe23327f7bb6c3e28f9ba2d2429422","sha256:53d61ceb4b08e5e29f62293c045bb342e2d97a6a1eac6787b2458b3a3816215e"],"state_sha256":"bfdfad5cfc206c324b45d632ff89db49b1fbde0fe6b16f9a68258ba686054269"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F5IjLI5F3cjo5XnqP3u6yOLVoMgzRg//ydTQIRpbi76rPonSpeDoX2f1ykn0ZHAtGoSrThV2xunruherPaXxDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T16:26:23.827158Z","bundle_sha256":"abcf4b202b492f8f768e71b6f3dd7b680f8c00bc3888494f79ddb37d47a7da06"}}