{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:6AFE3DNHVS3H7F4DLHSKLGMOUF","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":"dafa9875dd64cda0c6dabc0a84312f74e2f95c38bafbd54020f83a6d30f29c3c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-06-03T17:58:50Z","title_canon_sha256":"1e683c99306b1b12e3a851c2738f3f2cfd699cb60cc7174c49430a8aab53c8b2"},"schema_version":"1.0","source":{"id":"2506.03137","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.03137","created_at":"2026-07-05T11:46:43Z"},{"alias_kind":"arxiv_version","alias_value":"2506.03137v2","created_at":"2026-07-05T11:46:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.03137","created_at":"2026-07-05T11:46:43Z"},{"alias_kind":"pith_short_12","alias_value":"6AFE3DNHVS3H","created_at":"2026-07-05T11:46:43Z"},{"alias_kind":"pith_short_16","alias_value":"6AFE3DNHVS3H7F4D","created_at":"2026-07-05T11:46:43Z"},{"alias_kind":"pith_short_8","alias_value":"6AFE3DNH","created_at":"2026-07-05T11:46:43Z"}],"graph_snapshots":[{"event_id":"sha256:406546b82b763dd93c245d278b8f539f7c7204f1200e4ad2a28b61e8bd620fd1","target":"graph","created_at":"2026-07-05T11:46:43Z","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/2506.03137/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Crosstalk is a key obstacle to scaling up quantum computers. It may arise from persistent qubit-qubit couplings or dynamically during gate operation, with the latter being particularly difficult to detect. Here, we introduce the perfect entangler spectrum as a means to identify dynamic crosstalk leading to undesired entanglement. It leverages the geometric classification of two-qubit gates in terms of perfect entanglers. We exemplify application of the spectroscopy for fixed-frequency transmons and parametrically driven gates: When scanning the frequency of a spectator qubit, peaks in the perf","authors_text":"Christiane P. Koch, Matthias G. Krauss","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-06-03T17:58:50Z","title":"The perfect entangler spectrum as a tool to analyze crosstalk"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.03137","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":"sha256:6fad16a0e6d42240ba966e666e4f4b0d78a2cd1ed61bc50ea2abe5128903639b","target":"record","created_at":"2026-07-05T11:46:43Z","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":"dafa9875dd64cda0c6dabc0a84312f74e2f95c38bafbd54020f83a6d30f29c3c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-06-03T17:58:50Z","title_canon_sha256":"1e683c99306b1b12e3a851c2738f3f2cfd699cb60cc7174c49430a8aab53c8b2"},"schema_version":"1.0","source":{"id":"2506.03137","kind":"arxiv","version":2}},"canonical_sha256":"f00a4d8da7acb67f978359e4a5998ea16ed556a9dba6a0c3d34cb7d691f90ee5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f00a4d8da7acb67f978359e4a5998ea16ed556a9dba6a0c3d34cb7d691f90ee5","first_computed_at":"2026-07-05T11:46:43.826977Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:46:43.826977Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3Fnq+ob652dwk+hH/uXPW+HWEy2MWfvVhnbCPVOHyV++ku+ZIjConlaxKi2eHcDnTVGcQ7uyYtAc1izSc2k3Cw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:46:43.827430Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.03137","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6fad16a0e6d42240ba966e666e4f4b0d78a2cd1ed61bc50ea2abe5128903639b","sha256:406546b82b763dd93c245d278b8f539f7c7204f1200e4ad2a28b61e8bd620fd1"],"state_sha256":"23c611f94d7907525a2b00924124c80987d6ba04e13ce201250f95ae96246400"}