{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:WR4XPPYSXSHPUB6XNCQBTKIFVJ","short_pith_number":"pith:WR4XPPYS","canonical_record":{"source":{"id":"2512.17588","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-12-19T13:57:17Z","cross_cats_sorted":[],"title_canon_sha256":"724572cb00d03cb759f71677b0f82ae86f09c4b9fe80fce416ad03e707532b0a","abstract_canon_sha256":"34d3eb98c48e277909839f74c3def171945112a6b2024c067300af4c9ce2a917"},"schema_version":"1.0"},"canonical_sha256":"b47977bf12bc8efa07d768a019a905aa5d227abd84487b8d3096b7ba1632efc4","source":{"kind":"arxiv","id":"2512.17588","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2512.17588","created_at":"2026-06-19T16:12:17Z"},{"alias_kind":"arxiv_version","alias_value":"2512.17588v2","created_at":"2026-06-19T16:12:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.17588","created_at":"2026-06-19T16:12:17Z"},{"alias_kind":"pith_short_12","alias_value":"WR4XPPYSXSHP","created_at":"2026-06-19T16:12:17Z"},{"alias_kind":"pith_short_16","alias_value":"WR4XPPYSXSHPUB6X","created_at":"2026-06-19T16:12:17Z"},{"alias_kind":"pith_short_8","alias_value":"WR4XPPYS","created_at":"2026-06-19T16:12:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:WR4XPPYSXSHPUB6XNCQBTKIFVJ","target":"record","payload":{"canonical_record":{"source":{"id":"2512.17588","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-12-19T13:57:17Z","cross_cats_sorted":[],"title_canon_sha256":"724572cb00d03cb759f71677b0f82ae86f09c4b9fe80fce416ad03e707532b0a","abstract_canon_sha256":"34d3eb98c48e277909839f74c3def171945112a6b2024c067300af4c9ce2a917"},"schema_version":"1.0"},"canonical_sha256":"b47977bf12bc8efa07d768a019a905aa5d227abd84487b8d3096b7ba1632efc4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-19T16:12:17.182212Z","signature_b64":"Ig8TFHJ3HGRSJaaExhsGrg2UQKhhRCThR+i6f9mhWEy2NBAuMAktWL2WqCAntPI3/BhUAR1mAMT3TlSxBaarBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b47977bf12bc8efa07d768a019a905aa5d227abd84487b8d3096b7ba1632efc4","last_reissued_at":"2026-06-19T16:12:17.181721Z","signature_status":"signed_v1","first_computed_at":"2026-06-19T16:12:17.181721Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2512.17588","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":"2026-06-19T16:12:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oZkbeSbbKHavsMlPL3MKHYIkpXb9RJMcFcurIdIJOJ/WjepJVSr5DCUpQA6MP2mVSFj/bMB3ArUkgBnsNZnGBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T08:48:03.203141Z"},"content_sha256":"73184d25644643f36e583a25e0671558e3e7a7902d290173ce520dee4bc6b542","schema_version":"1.0","event_id":"sha256:73184d25644643f36e583a25e0671558e3e7a7902d290173ce520dee4bc6b542"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:WR4XPPYSXSHPUB6XNCQBTKIFVJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Frequency-Multiplexed Millimeter-Wave Fault-Tolerant Superconducting Qubits Enabled by an On-Chip Nonreciprocal Control Bus","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Sajjad Taravati","submitted_at":"2025-12-19T13:57:17Z","abstract_excerpt":"Scaling superconducting quantum processors is fundamentally limited by the escalating complexity of cryogenic wiring and the detrimental effects of microwave crosstalk and Purcell decay. This paper proposes a novel architecture based on frequency-multiplexed millimeter-wave superconducting qubits, integrating an on-chip cryogenic nonreciprocal space-time-periodic Josephson frequency multiplier as a universal control bus. The bus replaces multiple high-frequency XY drive lines with a single low-frequency input tone, which is parametrically converted into a comb of high-order harmonics, each res"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2512.17588","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/2512.17588/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":"2026-06-19T16:12:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c3Okq0hvZZOcCVglewMm/yGHA1fevmac+QV64x9DNOMwkNgIIToIXVlJJXV8C5Zi/7GHqfiyeEsb1mu7/WYaBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T08:48:03.203526Z"},"content_sha256":"e360145dd5d72d4fca3fcb1be1ca03892fc3a0a9c04c331b69562397fba94582","schema_version":"1.0","event_id":"sha256:e360145dd5d72d4fca3fcb1be1ca03892fc3a0a9c04c331b69562397fba94582"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WR4XPPYSXSHPUB6XNCQBTKIFVJ/bundle.json","state_url":"https://pith.science/pith/WR4XPPYSXSHPUB6XNCQBTKIFVJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WR4XPPYSXSHPUB6XNCQBTKIFVJ/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":"2026-06-20T08:48:03Z","links":{"resolver":"https://pith.science/pith/WR4XPPYSXSHPUB6XNCQBTKIFVJ","bundle":"https://pith.science/pith/WR4XPPYSXSHPUB6XNCQBTKIFVJ/bundle.json","state":"https://pith.science/pith/WR4XPPYSXSHPUB6XNCQBTKIFVJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WR4XPPYSXSHPUB6XNCQBTKIFVJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:WR4XPPYSXSHPUB6XNCQBTKIFVJ","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":"34d3eb98c48e277909839f74c3def171945112a6b2024c067300af4c9ce2a917","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-12-19T13:57:17Z","title_canon_sha256":"724572cb00d03cb759f71677b0f82ae86f09c4b9fe80fce416ad03e707532b0a"},"schema_version":"1.0","source":{"id":"2512.17588","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2512.17588","created_at":"2026-06-19T16:12:17Z"},{"alias_kind":"arxiv_version","alias_value":"2512.17588v2","created_at":"2026-06-19T16:12:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.17588","created_at":"2026-06-19T16:12:17Z"},{"alias_kind":"pith_short_12","alias_value":"WR4XPPYSXSHP","created_at":"2026-06-19T16:12:17Z"},{"alias_kind":"pith_short_16","alias_value":"WR4XPPYSXSHPUB6X","created_at":"2026-06-19T16:12:17Z"},{"alias_kind":"pith_short_8","alias_value":"WR4XPPYS","created_at":"2026-06-19T16:12:17Z"}],"graph_snapshots":[{"event_id":"sha256:e360145dd5d72d4fca3fcb1be1ca03892fc3a0a9c04c331b69562397fba94582","target":"graph","created_at":"2026-06-19T16:12:17Z","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/2512.17588/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Scaling superconducting quantum processors is fundamentally limited by the escalating complexity of cryogenic wiring and the detrimental effects of microwave crosstalk and Purcell decay. This paper proposes a novel architecture based on frequency-multiplexed millimeter-wave superconducting qubits, integrating an on-chip cryogenic nonreciprocal space-time-periodic Josephson frequency multiplier as a universal control bus. The bus replaces multiple high-frequency XY drive lines with a single low-frequency input tone, which is parametrically converted into a comb of high-order harmonics, each res","authors_text":"Sajjad Taravati","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-12-19T13:57:17Z","title":"Frequency-Multiplexed Millimeter-Wave Fault-Tolerant Superconducting Qubits Enabled by an On-Chip Nonreciprocal Control Bus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2512.17588","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":"sha256:73184d25644643f36e583a25e0671558e3e7a7902d290173ce520dee4bc6b542","target":"record","created_at":"2026-06-19T16:12:17Z","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":"34d3eb98c48e277909839f74c3def171945112a6b2024c067300af4c9ce2a917","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-12-19T13:57:17Z","title_canon_sha256":"724572cb00d03cb759f71677b0f82ae86f09c4b9fe80fce416ad03e707532b0a"},"schema_version":"1.0","source":{"id":"2512.17588","kind":"arxiv","version":2}},"canonical_sha256":"b47977bf12bc8efa07d768a019a905aa5d227abd84487b8d3096b7ba1632efc4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b47977bf12bc8efa07d768a019a905aa5d227abd84487b8d3096b7ba1632efc4","first_computed_at":"2026-06-19T16:12:17.181721Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-19T16:12:17.181721Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ig8TFHJ3HGRSJaaExhsGrg2UQKhhRCThR+i6f9mhWEy2NBAuMAktWL2WqCAntPI3/BhUAR1mAMT3TlSxBaarBQ==","signature_status":"signed_v1","signed_at":"2026-06-19T16:12:17.182212Z","signed_message":"canonical_sha256_bytes"},"source_id":"2512.17588","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:73184d25644643f36e583a25e0671558e3e7a7902d290173ce520dee4bc6b542","sha256:e360145dd5d72d4fca3fcb1be1ca03892fc3a0a9c04c331b69562397fba94582"],"state_sha256":"48dbc6c692ffa96b72e3f9836ec1e932827e909138d02ed23a32e00f8c0986f0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uVpe/fMlrGx12n0DGPp2db07OSb8kXSL4kviugt9Jh5ksvB1ypQ23Uih40riCCdyLV4UrTFbBeGrHJI1r1WsDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T08:48:03.205665Z","bundle_sha256":"f89c8122b3f82c3184d0342b244bc2d7a029403e8166e9c992cffbaa484549a9"}}