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Lett. 110, 066802 (2013)] that they `report a direct observation of vacuum Rabi splitting in a GaAs/AlGaAs double quantum dot (DQD) based charge qubit coupled with a superconducting coplanar waveguide (CPW) resonator'. In this comment, we challenge the main claims made in their paper and show that their results: a) do not provide any evidence of vacuum Rabi oscillations and b) do not provide any direct evidence of vacuum Rabi splitting."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1304.3697","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-04-12T17:56:01Z","cross_cats_sorted":["cond-mat.supr-con","quant-ph"],"title_canon_sha256":"3ad624331d6d0022b99cc2f81c096d622153e241e7fbe7d1f5265cff404448f3","abstract_canon_sha256":"8eff6b19e83b148f36cf7227f4f1216b026d7cae1aab4d9b334ee18f63635183"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:04:06.548963Z","signature_b64":"dE4pHtkjuvdlfpjCJNOnS4DyTTSS60IH8Io5yY6HiuEVIfQqyhgaAHcKU1LwTlgJKuwVhcR4Q4U7Nj5fjW2jBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"25dedbb678f9d7b72bcedf1e91753f2765e97e10167d762fb7007a5358870cd1","last_reissued_at":"2026-05-18T03:04:06.548528Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:04:06.548528Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Comment on `Vacuum Rabi Splitting in a Semiconductor Circuit QED System' by Toida et al., Phys. 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