{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:2GGBM2S64GC75FKASINW7JJBA2","short_pith_number":"pith:2GGBM2S6","canonical_record":{"source":{"id":"1004.3864","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-04-22T08:49:35Z","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"title_canon_sha256":"aaea94627a93406ad739444c21fc64640e0284414406cc0643ac62f90a877a2d","abstract_canon_sha256":"8c4471ef20af792a2b7f342cda90cabf861f7d94e34d676bcdf9740967110113"},"schema_version":"1.0"},"canonical_sha256":"d18c166a5ee185fe9540921b6fa52106be78001ac10451c6e89da90432e968a5","source":{"kind":"arxiv","id":"1004.3864","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.3864","created_at":"2026-05-18T02:07:55Z"},{"alias_kind":"arxiv_version","alias_value":"1004.3864v1","created_at":"2026-05-18T02:07:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.3864","created_at":"2026-05-18T02:07:55Z"},{"alias_kind":"pith_short_12","alias_value":"2GGBM2S64GC7","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"2GGBM2S64GC75FKA","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"2GGBM2S6","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:2GGBM2S64GC75FKASINW7JJBA2","target":"record","payload":{"canonical_record":{"source":{"id":"1004.3864","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-04-22T08:49:35Z","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"title_canon_sha256":"aaea94627a93406ad739444c21fc64640e0284414406cc0643ac62f90a877a2d","abstract_canon_sha256":"8c4471ef20af792a2b7f342cda90cabf861f7d94e34d676bcdf9740967110113"},"schema_version":"1.0"},"canonical_sha256":"d18c166a5ee185fe9540921b6fa52106be78001ac10451c6e89da90432e968a5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:07:55.285967Z","signature_b64":"5GR1Wdxj70Hc0m98NOB71YRh7xW5Ukrhm8YPwl97fE3UW5d2mw4I2rvFZeupDBuj0BAdhmT/fWM/aAWTlH50CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d18c166a5ee185fe9540921b6fa52106be78001ac10451c6e89da90432e968a5","last_reissued_at":"2026-05-18T02:07:55.285221Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:07:55.285221Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1004.3864","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":"2026-05-18T02:07:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JJpke55PJm3Qxg1LRCJr0Zy7IlKCGDHE4KAi/OgIG6knP6xMtaTNOmuqVhCBuF0cetMwpYDFH6rKwIAJUrN6Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:27:23.116874Z"},"content_sha256":"6536ce05e3e21b48b392f0f3bd711b256ca3f7f178d9dc5364e0e2d812bc27ed","schema_version":"1.0","event_id":"sha256:6536ce05e3e21b48b392f0f3bd711b256ca3f7f178d9dc5364e0e2d812bc27ed"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:2GGBM2S64GC75FKASINW7JJBA2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultimate on-chip quantum amplifier","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","quant-ph"],"primary_cat":"cond-mat.supr-con","authors_text":"A. A. Abdumalikov Jr., A. M. Zagoskin, J. S. Tsai, O. Astafiev, Y. Nakamura, Yu. A. Pashkin","submitted_at":"2010-04-22T08:49:35Z","abstract_excerpt":"We report amplification of electromagnetic waves by a single artificial atom in open 1D space. Our three-level artificial atom -- a superconducting quantum circuit -- coupled to a transmission line presents an analog of a natural atom in open space. The system is the most fundamental quantum amplifier whose gain is limited by a spontaneous emission mechanism. The noise performance is determined by the quantum noise revealed in the spectrum of spontaneous emission, also characterized in our experiments."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.3864","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:07:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mnJzPZUVAWeoe7QmKcYuBe8F1ZLCMZIawke2M0gRKiqH3Hf3YdPA4lcuhblPB41wUk4mZT5zXFyMEsj+f8i1BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:27:23.117421Z"},"content_sha256":"f337a038ae1df90b8fdcabc99b4f6058dc73aa8d559db378a9c6e092d3cd7ba0","schema_version":"1.0","event_id":"sha256:f337a038ae1df90b8fdcabc99b4f6058dc73aa8d559db378a9c6e092d3cd7ba0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2GGBM2S64GC75FKASINW7JJBA2/bundle.json","state_url":"https://pith.science/pith/2GGBM2S64GC75FKASINW7JJBA2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2GGBM2S64GC75FKASINW7JJBA2/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":"2026-05-26T12:27:23Z","links":{"resolver":"https://pith.science/pith/2GGBM2S64GC75FKASINW7JJBA2","bundle":"https://pith.science/pith/2GGBM2S64GC75FKASINW7JJBA2/bundle.json","state":"https://pith.science/pith/2GGBM2S64GC75FKASINW7JJBA2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2GGBM2S64GC75FKASINW7JJBA2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:2GGBM2S64GC75FKASINW7JJBA2","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":"8c4471ef20af792a2b7f342cda90cabf861f7d94e34d676bcdf9740967110113","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-04-22T08:49:35Z","title_canon_sha256":"aaea94627a93406ad739444c21fc64640e0284414406cc0643ac62f90a877a2d"},"schema_version":"1.0","source":{"id":"1004.3864","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.3864","created_at":"2026-05-18T02:07:55Z"},{"alias_kind":"arxiv_version","alias_value":"1004.3864v1","created_at":"2026-05-18T02:07:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.3864","created_at":"2026-05-18T02:07:55Z"},{"alias_kind":"pith_short_12","alias_value":"2GGBM2S64GC7","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"2GGBM2S64GC75FKA","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"2GGBM2S6","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:f337a038ae1df90b8fdcabc99b4f6058dc73aa8d559db378a9c6e092d3cd7ba0","target":"graph","created_at":"2026-05-18T02:07:55Z","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"},"paper":{"abstract_excerpt":"We report amplification of electromagnetic waves by a single artificial atom in open 1D space. Our three-level artificial atom -- a superconducting quantum circuit -- coupled to a transmission line presents an analog of a natural atom in open space. The system is the most fundamental quantum amplifier whose gain is limited by a spontaneous emission mechanism. The noise performance is determined by the quantum noise revealed in the spectrum of spontaneous emission, also characterized in our experiments.","authors_text":"A. A. Abdumalikov Jr., A. M. Zagoskin, J. S. Tsai, O. Astafiev, Y. Nakamura, Yu. A. Pashkin","cross_cats":["cond-mat.mes-hall","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-04-22T08:49:35Z","title":"Ultimate on-chip quantum amplifier"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.3864","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":"sha256:6536ce05e3e21b48b392f0f3bd711b256ca3f7f178d9dc5364e0e2d812bc27ed","target":"record","created_at":"2026-05-18T02:07:55Z","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":"8c4471ef20af792a2b7f342cda90cabf861f7d94e34d676bcdf9740967110113","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-04-22T08:49:35Z","title_canon_sha256":"aaea94627a93406ad739444c21fc64640e0284414406cc0643ac62f90a877a2d"},"schema_version":"1.0","source":{"id":"1004.3864","kind":"arxiv","version":1}},"canonical_sha256":"d18c166a5ee185fe9540921b6fa52106be78001ac10451c6e89da90432e968a5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d18c166a5ee185fe9540921b6fa52106be78001ac10451c6e89da90432e968a5","first_computed_at":"2026-05-18T02:07:55.285221Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:55.285221Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5GR1Wdxj70Hc0m98NOB71YRh7xW5Ukrhm8YPwl97fE3UW5d2mw4I2rvFZeupDBuj0BAdhmT/fWM/aAWTlH50CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:55.285967Z","signed_message":"canonical_sha256_bytes"},"source_id":"1004.3864","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6536ce05e3e21b48b392f0f3bd711b256ca3f7f178d9dc5364e0e2d812bc27ed","sha256:f337a038ae1df90b8fdcabc99b4f6058dc73aa8d559db378a9c6e092d3cd7ba0"],"state_sha256":"65f66ec18bcc66f62846d5a4007e0f8fa4519633092edd51a6ce0adf23d17b26"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VjeMHIbbCTLaj+Ub1vDRMduRx/V4+H8aZoNHCq6Yv+gi4mGG8me73+pVVnM90AHqFDXZXmTeJcBBLouBYIJZCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T12:27:23.120020Z","bundle_sha256":"9c06af63d10365ba93064d37712685f4e2d978163390c490aace0158afc70801"}}