{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:6FA2TZBY7NYPOXLSKSXYXBGLJO","short_pith_number":"pith:6FA2TZBY","canonical_record":{"source":{"id":"2403.02319","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-03-04T18:54:25Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"7d6575fe218245a1696c74d92f79b5e895a271f8dc4835d6bde7fc931635fa09","abstract_canon_sha256":"6f3c8ea285e3690b0c53fb0d4623eda1ecbbfb4abd302110dd4f2bde70cd09ad"},"schema_version":"1.0"},"canonical_sha256":"f141a9e438fb70f75d7254af8b84cb4bb2b1ea0bd8c466e2a3258ddc26473c56","source":{"kind":"arxiv","id":"2403.02319","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2403.02319","created_at":"2026-07-05T07:51:59Z"},{"alias_kind":"arxiv_version","alias_value":"2403.02319v1","created_at":"2026-07-05T07:51:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2403.02319","created_at":"2026-07-05T07:51:59Z"},{"alias_kind":"pith_short_12","alias_value":"6FA2TZBY7NYP","created_at":"2026-07-05T07:51:59Z"},{"alias_kind":"pith_short_16","alias_value":"6FA2TZBY7NYPOXLS","created_at":"2026-07-05T07:51:59Z"},{"alias_kind":"pith_short_8","alias_value":"6FA2TZBY","created_at":"2026-07-05T07:51:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:6FA2TZBY7NYPOXLSKSXYXBGLJO","target":"record","payload":{"canonical_record":{"source":{"id":"2403.02319","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-03-04T18:54:25Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"7d6575fe218245a1696c74d92f79b5e895a271f8dc4835d6bde7fc931635fa09","abstract_canon_sha256":"6f3c8ea285e3690b0c53fb0d4623eda1ecbbfb4abd302110dd4f2bde70cd09ad"},"schema_version":"1.0"},"canonical_sha256":"f141a9e438fb70f75d7254af8b84cb4bb2b1ea0bd8c466e2a3258ddc26473c56","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:51:59.355030Z","signature_b64":"6m5WqVhnAWOxcCYFKDEEdlA293/sfYQ6v3O07kDFPPyK1nBxgRBR87isZEoaGiOsQOxSSOXs7ahv6JJyU7jMBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f141a9e438fb70f75d7254af8b84cb4bb2b1ea0bd8c466e2a3258ddc26473c56","last_reissued_at":"2026-07-05T07:51:59.354595Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:51:59.354595Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2403.02319","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":"2026-07-05T07:51:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hf60XmHMwI6d9GChYZKd1p/6ah4U2Sk3yN+9FS3Q5WB7rpL22ewqd8f0WRJ+oWvSAXpmtvFcvCn1PbFwiCJgBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T07:25:18.187967Z"},"content_sha256":"deffd2a4bc7b01f0c9da52175f0258ed4b03840e0fd2f6d7d8a0539711fa59be","schema_version":"1.0","event_id":"sha256:deffd2a4bc7b01f0c9da52175f0258ed4b03840e0fd2f6d7d8a0539711fa59be"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:6FA2TZBY7NYPOXLSKSXYXBGLJO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Near-ground state cooling in electromechanics using measurement-based feedback and Josephson parametric amplifier","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"quant-ph","authors_text":"Debopam Datta, Ewa Rej, Joonas Govenius, Mika A. Sillanp\\\"a\\\"a, Nils Tiencken, Richa Cutting, Visa Vesterinen, Yulong Liu","submitted_at":"2024-03-04T18:54:25Z","abstract_excerpt":"Feedback-based control of nano- and micromechanical resonators can enable the study of macroscopic quantum phenomena and also sensitive force measurements. Here, we demonstrate the feedback cooling of a low-loss and high-stress macroscopic SiN membrane resonator close to its quantum ground state. We use the microwave optomechanical platform, where the resonator is coupled to a microwave cavity. The experiment utilizes a Josephson travelling wave parametric amplifier, which is nearly quantum-limited in added noise, and is important to mitigate resonator heating due to system noise in the feedba"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2403.02319","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/2403.02319/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":"2026-07-05T07:51:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LIMqTDIE355uf6tacWoNL7LpgiwQB1I/Sov5+HW6w6n5t9N0fcUxNtpVeBy8Oz8d2DtgOLvS0GZzcbJgF7bbCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T07:25:18.188610Z"},"content_sha256":"534aae0084f7a6028b28b52d2174b294b348791858d9ff60fb27aadf793dfc43","schema_version":"1.0","event_id":"sha256:534aae0084f7a6028b28b52d2174b294b348791858d9ff60fb27aadf793dfc43"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6FA2TZBY7NYPOXLSKSXYXBGLJO/bundle.json","state_url":"https://pith.science/pith/6FA2TZBY7NYPOXLSKSXYXBGLJO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6FA2TZBY7NYPOXLSKSXYXBGLJO/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":"2026-07-07T07:25:18Z","links":{"resolver":"https://pith.science/pith/6FA2TZBY7NYPOXLSKSXYXBGLJO","bundle":"https://pith.science/pith/6FA2TZBY7NYPOXLSKSXYXBGLJO/bundle.json","state":"https://pith.science/pith/6FA2TZBY7NYPOXLSKSXYXBGLJO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6FA2TZBY7NYPOXLSKSXYXBGLJO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:6FA2TZBY7NYPOXLSKSXYXBGLJO","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":"6f3c8ea285e3690b0c53fb0d4623eda1ecbbfb4abd302110dd4f2bde70cd09ad","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-03-04T18:54:25Z","title_canon_sha256":"7d6575fe218245a1696c74d92f79b5e895a271f8dc4835d6bde7fc931635fa09"},"schema_version":"1.0","source":{"id":"2403.02319","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2403.02319","created_at":"2026-07-05T07:51:59Z"},{"alias_kind":"arxiv_version","alias_value":"2403.02319v1","created_at":"2026-07-05T07:51:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2403.02319","created_at":"2026-07-05T07:51:59Z"},{"alias_kind":"pith_short_12","alias_value":"6FA2TZBY7NYP","created_at":"2026-07-05T07:51:59Z"},{"alias_kind":"pith_short_16","alias_value":"6FA2TZBY7NYPOXLS","created_at":"2026-07-05T07:51:59Z"},{"alias_kind":"pith_short_8","alias_value":"6FA2TZBY","created_at":"2026-07-05T07:51:59Z"}],"graph_snapshots":[{"event_id":"sha256:534aae0084f7a6028b28b52d2174b294b348791858d9ff60fb27aadf793dfc43","target":"graph","created_at":"2026-07-05T07:51:59Z","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/2403.02319/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Feedback-based control of nano- and micromechanical resonators can enable the study of macroscopic quantum phenomena and also sensitive force measurements. Here, we demonstrate the feedback cooling of a low-loss and high-stress macroscopic SiN membrane resonator close to its quantum ground state. We use the microwave optomechanical platform, where the resonator is coupled to a microwave cavity. The experiment utilizes a Josephson travelling wave parametric amplifier, which is nearly quantum-limited in added noise, and is important to mitigate resonator heating due to system noise in the feedba","authors_text":"Debopam Datta, Ewa Rej, Joonas Govenius, Mika A. Sillanp\\\"a\\\"a, Nils Tiencken, Richa Cutting, Visa Vesterinen, Yulong Liu","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-03-04T18:54:25Z","title":"Near-ground state cooling in electromechanics using measurement-based feedback and Josephson parametric amplifier"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2403.02319","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:deffd2a4bc7b01f0c9da52175f0258ed4b03840e0fd2f6d7d8a0539711fa59be","target":"record","created_at":"2026-07-05T07:51:59Z","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":"6f3c8ea285e3690b0c53fb0d4623eda1ecbbfb4abd302110dd4f2bde70cd09ad","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-03-04T18:54:25Z","title_canon_sha256":"7d6575fe218245a1696c74d92f79b5e895a271f8dc4835d6bde7fc931635fa09"},"schema_version":"1.0","source":{"id":"2403.02319","kind":"arxiv","version":1}},"canonical_sha256":"f141a9e438fb70f75d7254af8b84cb4bb2b1ea0bd8c466e2a3258ddc26473c56","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f141a9e438fb70f75d7254af8b84cb4bb2b1ea0bd8c466e2a3258ddc26473c56","first_computed_at":"2026-07-05T07:51:59.354595Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:51:59.354595Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6m5WqVhnAWOxcCYFKDEEdlA293/sfYQ6v3O07kDFPPyK1nBxgRBR87isZEoaGiOsQOxSSOXs7ahv6JJyU7jMBA==","signature_status":"signed_v1","signed_at":"2026-07-05T07:51:59.355030Z","signed_message":"canonical_sha256_bytes"},"source_id":"2403.02319","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:deffd2a4bc7b01f0c9da52175f0258ed4b03840e0fd2f6d7d8a0539711fa59be","sha256:534aae0084f7a6028b28b52d2174b294b348791858d9ff60fb27aadf793dfc43"],"state_sha256":"a4c79e599bf0fe7deac8684f48b9b234f39942398aab8dac7cbbf2892b755e53"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oBOUaWxAcCS0N1AIdkKOA/3gLoNZfV0Lwq3ObtNzoGqgFYU3wYKgBPWoC4jecnBNTelNkoRWi8stLsHbTIBrCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T07:25:18.192361Z","bundle_sha256":"2e331f4ed4a788329e041fe69886e4e6b49abed39eedf1887aa1f55379c91ab0"}}