{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:5CY27PVZCKXXTFFKWTZBRB4CJT","short_pith_number":"pith:5CY27PVZ","canonical_record":{"source":{"id":"1901.07211","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-01-22T08:55:18Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"8d10c0fdc2237acf34b19822637eee54e3418524098ad0700a2dda396a1c3824","abstract_canon_sha256":"fe452778af6a1a7bdd56f7170fa2cf174fdc3b5e90ae1bbfcac972e65301b808"},"schema_version":"1.0"},"canonical_sha256":"e8b1afbeb912af7994aab4f21887824cd058c5fd09bc1314f902c10870bc4320","source":{"kind":"arxiv","id":"1901.07211","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07211","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07211v1","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07211","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"pith_short_12","alias_value":"5CY27PVZCKXX","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"5CY27PVZCKXXTFFK","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"5CY27PVZ","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:5CY27PVZCKXXTFFKWTZBRB4CJT","target":"record","payload":{"canonical_record":{"source":{"id":"1901.07211","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-01-22T08:55:18Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"8d10c0fdc2237acf34b19822637eee54e3418524098ad0700a2dda396a1c3824","abstract_canon_sha256":"fe452778af6a1a7bdd56f7170fa2cf174fdc3b5e90ae1bbfcac972e65301b808"},"schema_version":"1.0"},"canonical_sha256":"e8b1afbeb912af7994aab4f21887824cd058c5fd09bc1314f902c10870bc4320","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:47.778907Z","signature_b64":"CtISigIpY1kKs7HgtgjA9XJ2O/qqSSrh1SIzu9Js+wkfZ66VJi7OznzlTDgWxX03AL1Km11LEdVQYcCEZX57Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e8b1afbeb912af7994aab4f21887824cd058c5fd09bc1314f902c10870bc4320","last_reissued_at":"2026-05-17T23:55:47.778265Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:47.778265Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.07211","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":"2026-05-17T23:55:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gkABA26cZLFL/eROzs7iKmWBRi31xgXEl9nGQmNLAxULpbNDNBFfNrlOpB71QS4tfouySAzKim06k35m54V7BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T10:36:06.261880Z"},"content_sha256":"c35abb49963d811fe3859ed8331de7fded03d80236a8eab01c09fb7db9099ad1","schema_version":"1.0","event_id":"sha256:c35abb49963d811fe3859ed8331de7fded03d80236a8eab01c09fb7db9099ad1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:5CY27PVZCKXXTFFKWTZBRB4CJT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multiplexed readout of four qubits in 3D cQED architecture using broadband JPA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"quant-ph","authors_text":"Kishor V. Salunkhe, Meghan P. Patankar, Nicolas Gheeraert, R. Vijay, Suman Kundu, Sumeru Hazra, Tanay Roy","submitted_at":"2019-01-22T08:55:18Z","abstract_excerpt":"We propose and demonstrate a frequency-multiplexed readout scheme in 3D cQED architecture. We use four transmon qubits coupled to individual rectangular cavities which are aperture-coupled to a common rectangular waveguide feedline. A coaxial to waveguide transformer at the other end of the feedline allows one to launch and collect the multiplexed signal. The reflected readout signal is amplified by an impedance engineered broadband parametric amplifier with 380 MHz of bandwidth. This provides us high fidelity single-shot readout of multiple qubits using compact microwave circuitry, an efficie"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07211","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":"2026-05-17T23:55:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rtkApK1nDhDoMZbqb85dy6vb+6X2bsz1yEUw7ubq2lSD53foiaXhiXU/44ou+oPoAbSEiVcl8hYDPjXqvnffAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T10:36:06.262236Z"},"content_sha256":"c73ec1cadbee22f6d0010303594f5e6ad3cd90cf60ec04ceb443d60dd2b6751a","schema_version":"1.0","event_id":"sha256:c73ec1cadbee22f6d0010303594f5e6ad3cd90cf60ec04ceb443d60dd2b6751a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5CY27PVZCKXXTFFKWTZBRB4CJT/bundle.json","state_url":"https://pith.science/pith/5CY27PVZCKXXTFFKWTZBRB4CJT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5CY27PVZCKXXTFFKWTZBRB4CJT/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":"2026-06-12T10:36:06Z","links":{"resolver":"https://pith.science/pith/5CY27PVZCKXXTFFKWTZBRB4CJT","bundle":"https://pith.science/pith/5CY27PVZCKXXTFFKWTZBRB4CJT/bundle.json","state":"https://pith.science/pith/5CY27PVZCKXXTFFKWTZBRB4CJT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5CY27PVZCKXXTFFKWTZBRB4CJT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:5CY27PVZCKXXTFFKWTZBRB4CJT","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":"fe452778af6a1a7bdd56f7170fa2cf174fdc3b5e90ae1bbfcac972e65301b808","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-01-22T08:55:18Z","title_canon_sha256":"8d10c0fdc2237acf34b19822637eee54e3418524098ad0700a2dda396a1c3824"},"schema_version":"1.0","source":{"id":"1901.07211","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07211","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07211v1","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07211","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"pith_short_12","alias_value":"5CY27PVZCKXX","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"5CY27PVZCKXXTFFK","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"5CY27PVZ","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:c73ec1cadbee22f6d0010303594f5e6ad3cd90cf60ec04ceb443d60dd2b6751a","target":"graph","created_at":"2026-05-17T23:55:47Z","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 propose and demonstrate a frequency-multiplexed readout scheme in 3D cQED architecture. We use four transmon qubits coupled to individual rectangular cavities which are aperture-coupled to a common rectangular waveguide feedline. A coaxial to waveguide transformer at the other end of the feedline allows one to launch and collect the multiplexed signal. The reflected readout signal is amplified by an impedance engineered broadband parametric amplifier with 380 MHz of bandwidth. This provides us high fidelity single-shot readout of multiple qubits using compact microwave circuitry, an efficie","authors_text":"Kishor V. Salunkhe, Meghan P. Patankar, Nicolas Gheeraert, R. Vijay, Suman Kundu, Sumeru Hazra, Tanay Roy","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-01-22T08:55:18Z","title":"Multiplexed readout of four qubits in 3D cQED architecture using broadband JPA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07211","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:c35abb49963d811fe3859ed8331de7fded03d80236a8eab01c09fb7db9099ad1","target":"record","created_at":"2026-05-17T23:55:47Z","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":"fe452778af6a1a7bdd56f7170fa2cf174fdc3b5e90ae1bbfcac972e65301b808","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-01-22T08:55:18Z","title_canon_sha256":"8d10c0fdc2237acf34b19822637eee54e3418524098ad0700a2dda396a1c3824"},"schema_version":"1.0","source":{"id":"1901.07211","kind":"arxiv","version":1}},"canonical_sha256":"e8b1afbeb912af7994aab4f21887824cd058c5fd09bc1314f902c10870bc4320","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e8b1afbeb912af7994aab4f21887824cd058c5fd09bc1314f902c10870bc4320","first_computed_at":"2026-05-17T23:55:47.778265Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:47.778265Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CtISigIpY1kKs7HgtgjA9XJ2O/qqSSrh1SIzu9Js+wkfZ66VJi7OznzlTDgWxX03AL1Km11LEdVQYcCEZX57Bw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:47.778907Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.07211","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c35abb49963d811fe3859ed8331de7fded03d80236a8eab01c09fb7db9099ad1","sha256:c73ec1cadbee22f6d0010303594f5e6ad3cd90cf60ec04ceb443d60dd2b6751a"],"state_sha256":"069a7b0b6d8940a8125fec4fcbfd49e982c0badb100e0ae23c95466f69d3ab24"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yWWVV4TEaC2GdbwD1pIDwlT/vtGMHs3akSpieDPA/gtAIuXwt/Z7+WPdZyh0fLzcm3Sja0BDu6daJeXBJ3ATDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-12T10:36:06.264941Z","bundle_sha256":"f6300d8faf1a89ff2c36b1a5e3e7233c11cb5c37e8e25d0a140e46fac67b7a38"}}