{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:BJ2H4TFGKC2DCFB3STKMZFXMAN","short_pith_number":"pith:BJ2H4TFG","canonical_record":{"source":{"id":"2606.24772","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-23T16:31:58Z","cross_cats_sorted":[],"title_canon_sha256":"946035496215d2e381752911a3d0ae17ec37418c93ff33e4c7ea90e3f5452403","abstract_canon_sha256":"b778aab678707996bc0fd91d1c9b8b513f139f0fbb1ccd99c3166bdd6e2fa506"},"schema_version":"1.0"},"canonical_sha256":"0a747e4ca650b431143b94d4cc96ec0352ae84f0d4e60a42c0d63786e8c2ed24","source":{"kind":"arxiv","id":"2606.24772","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.24772","created_at":"2026-06-24T01:15:41Z"},{"alias_kind":"arxiv_version","alias_value":"2606.24772v1","created_at":"2026-06-24T01:15:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.24772","created_at":"2026-06-24T01:15:41Z"},{"alias_kind":"pith_short_12","alias_value":"BJ2H4TFGKC2D","created_at":"2026-06-24T01:15:41Z"},{"alias_kind":"pith_short_16","alias_value":"BJ2H4TFGKC2DCFB3","created_at":"2026-06-24T01:15:41Z"},{"alias_kind":"pith_short_8","alias_value":"BJ2H4TFG","created_at":"2026-06-24T01:15:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:BJ2H4TFGKC2DCFB3STKMZFXMAN","target":"record","payload":{"canonical_record":{"source":{"id":"2606.24772","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-23T16:31:58Z","cross_cats_sorted":[],"title_canon_sha256":"946035496215d2e381752911a3d0ae17ec37418c93ff33e4c7ea90e3f5452403","abstract_canon_sha256":"b778aab678707996bc0fd91d1c9b8b513f139f0fbb1ccd99c3166bdd6e2fa506"},"schema_version":"1.0"},"canonical_sha256":"0a747e4ca650b431143b94d4cc96ec0352ae84f0d4e60a42c0d63786e8c2ed24","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-24T01:15:41.844463Z","signature_b64":"w/VSHnJ1DZ1FtXycjqgWB0eTF9JS8hKpsT46VMOVHXe0v4JF53rFSCvqgaC8heG+BJ5KEddTtSZptjAz+wEuCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0a747e4ca650b431143b94d4cc96ec0352ae84f0d4e60a42c0d63786e8c2ed24","last_reissued_at":"2026-06-24T01:15:41.844050Z","signature_status":"signed_v1","first_computed_at":"2026-06-24T01:15:41.844050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.24772","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":"2026-06-24T01:15:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wstZd3I1s6BjQgl1UiTcPJ6F+MX5Tb/xao8ZMplI70mz3NJ/UXzthUD2f6G9Rn0ljWNII6O1eT+FWQpO+UrhBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T12:42:33.479098Z"},"content_sha256":"bb50a87793f5152cf196e8688f0d4ebffe4c18af4cfb354dee9d6a0fcf9ae4bc","schema_version":"1.0","event_id":"sha256:bb50a87793f5152cf196e8688f0d4ebffe4c18af4cfb354dee9d6a0fcf9ae4bc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:BJ2H4TFGKC2DCFB3STKMZFXMAN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A high-fidelity two-qubit gate for multimode superconducting P-mon qubits","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Carlos A. Riofr\\'io, Christian M. F. Schneider, Federico A. Roy, Florian Wallner, Frederik Pfeiffer, Gleb Krylov, Johannes Schirk, Julius Feigl, Kevin Kiener, Lasse S\\\"odergren, Leon Koch, Max Werninghaus, Niklas J. Glaser, Stefan Filipp","submitted_at":"2026-06-23T16:31:58Z","abstract_excerpt":"To scale superconducting quantum processors, it is essential to achieve long coherence times while engineering interactions that do not introduce additional decoherence channels. In superconducting qubit systems, this can be realized using multimode circuits that feature a protected qubit mode alongside a distinct mediator mode. Building on this concept, our recently developed P-mon qubit provides intrinsic protection against decoherence from the readout environment. We extend this approach to controlled two-qubit interactions, by exploiting the mediator modes of P-mons for on-demand coupling."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.24772","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/2606.24772/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":"2026-06-24T01:15:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l6O7EDk3KsfEsdY/KEWA7h2wL3PWyRA1melkuILVOm1gn3rOTnZZ7Ce06kzNPAcH+6/OH+i7rJu4Nf0h13OBAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T12:42:33.479486Z"},"content_sha256":"31021c446891aaa496f874037fc2c084b67d65d0454ac7d4a5c2e6ebf2cc015e","schema_version":"1.0","event_id":"sha256:31021c446891aaa496f874037fc2c084b67d65d0454ac7d4a5c2e6ebf2cc015e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BJ2H4TFGKC2DCFB3STKMZFXMAN/bundle.json","state_url":"https://pith.science/pith/BJ2H4TFGKC2DCFB3STKMZFXMAN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BJ2H4TFGKC2DCFB3STKMZFXMAN/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":"2026-06-28T12:42:33Z","links":{"resolver":"https://pith.science/pith/BJ2H4TFGKC2DCFB3STKMZFXMAN","bundle":"https://pith.science/pith/BJ2H4TFGKC2DCFB3STKMZFXMAN/bundle.json","state":"https://pith.science/pith/BJ2H4TFGKC2DCFB3STKMZFXMAN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BJ2H4TFGKC2DCFB3STKMZFXMAN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:BJ2H4TFGKC2DCFB3STKMZFXMAN","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":"b778aab678707996bc0fd91d1c9b8b513f139f0fbb1ccd99c3166bdd6e2fa506","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-23T16:31:58Z","title_canon_sha256":"946035496215d2e381752911a3d0ae17ec37418c93ff33e4c7ea90e3f5452403"},"schema_version":"1.0","source":{"id":"2606.24772","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.24772","created_at":"2026-06-24T01:15:41Z"},{"alias_kind":"arxiv_version","alias_value":"2606.24772v1","created_at":"2026-06-24T01:15:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.24772","created_at":"2026-06-24T01:15:41Z"},{"alias_kind":"pith_short_12","alias_value":"BJ2H4TFGKC2D","created_at":"2026-06-24T01:15:41Z"},{"alias_kind":"pith_short_16","alias_value":"BJ2H4TFGKC2DCFB3","created_at":"2026-06-24T01:15:41Z"},{"alias_kind":"pith_short_8","alias_value":"BJ2H4TFG","created_at":"2026-06-24T01:15:41Z"}],"graph_snapshots":[{"event_id":"sha256:31021c446891aaa496f874037fc2c084b67d65d0454ac7d4a5c2e6ebf2cc015e","target":"graph","created_at":"2026-06-24T01:15:41Z","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/2606.24772/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"To scale superconducting quantum processors, it is essential to achieve long coherence times while engineering interactions that do not introduce additional decoherence channels. In superconducting qubit systems, this can be realized using multimode circuits that feature a protected qubit mode alongside a distinct mediator mode. Building on this concept, our recently developed P-mon qubit provides intrinsic protection against decoherence from the readout environment. We extend this approach to controlled two-qubit interactions, by exploiting the mediator modes of P-mons for on-demand coupling.","authors_text":"Carlos A. Riofr\\'io, Christian M. F. Schneider, Federico A. Roy, Florian Wallner, Frederik Pfeiffer, Gleb Krylov, Johannes Schirk, Julius Feigl, Kevin Kiener, Lasse S\\\"odergren, Leon Koch, Max Werninghaus, Niklas J. Glaser, Stefan Filipp","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-23T16:31:58Z","title":"A high-fidelity two-qubit gate for multimode superconducting P-mon qubits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.24772","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:bb50a87793f5152cf196e8688f0d4ebffe4c18af4cfb354dee9d6a0fcf9ae4bc","target":"record","created_at":"2026-06-24T01:15:41Z","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":"b778aab678707996bc0fd91d1c9b8b513f139f0fbb1ccd99c3166bdd6e2fa506","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-23T16:31:58Z","title_canon_sha256":"946035496215d2e381752911a3d0ae17ec37418c93ff33e4c7ea90e3f5452403"},"schema_version":"1.0","source":{"id":"2606.24772","kind":"arxiv","version":1}},"canonical_sha256":"0a747e4ca650b431143b94d4cc96ec0352ae84f0d4e60a42c0d63786e8c2ed24","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0a747e4ca650b431143b94d4cc96ec0352ae84f0d4e60a42c0d63786e8c2ed24","first_computed_at":"2026-06-24T01:15:41.844050Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-24T01:15:41.844050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w/VSHnJ1DZ1FtXycjqgWB0eTF9JS8hKpsT46VMOVHXe0v4JF53rFSCvqgaC8heG+BJ5KEddTtSZptjAz+wEuCw==","signature_status":"signed_v1","signed_at":"2026-06-24T01:15:41.844463Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.24772","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bb50a87793f5152cf196e8688f0d4ebffe4c18af4cfb354dee9d6a0fcf9ae4bc","sha256:31021c446891aaa496f874037fc2c084b67d65d0454ac7d4a5c2e6ebf2cc015e"],"state_sha256":"5b764d6cdf6c1c77e7c57eafc963bb9d40321dec17c2d2b03ea4238d99a9d252"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"69iwZANp6w1mZXOylLUTcRpetXjFioUKDnpoAvAUlqxbgPQWmq5Sl7nrLdvcqjFjHizqPaHyblxT4XDq/KjxAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T12:42:33.481780Z","bundle_sha256":"173c24bdb9e7034ee8a1993c741667f6e2618796fbd0cb71a61e14c1e0a2dfe9"}}