<p>Efficient quantum state transfer with three-level systems (qutrits) is fundamental to information science and technology. Here we present a theoretical protocol for implementing state transfer between two superconducting qutrits in circuit quantum electrodynamics. In the regime of resonant interaction, the two qutrits are coupled to the common single-mode cavity fields of transmission line resonators. Based on the data bus of cavity modes, the qutrit–qutrit couplings can be attained effectively. By suitably engineering the qutrit–resonator coupling rates, we perform a one-step operation of desired qutrit state transfer by the technique of shortcuts to adiabaticity. Owing to the rapidness and robustness of quantum operations, the current scheme is insusceptible to environmental decoherence effects and remains insensitive to control parameter errors. Thus, the scheme could offer a promising route towards scalable superconducting qutrit state transfer.</p>

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One-step state transfer between two superconducting qutrits in circuit quantum electrodynamics

  • Zhi-Bo Feng,
  • Run-Ying Yan

摘要

Efficient quantum state transfer with three-level systems (qutrits) is fundamental to information science and technology. Here we present a theoretical protocol for implementing state transfer between two superconducting qutrits in circuit quantum electrodynamics. In the regime of resonant interaction, the two qutrits are coupled to the common single-mode cavity fields of transmission line resonators. Based on the data bus of cavity modes, the qutrit–qutrit couplings can be attained effectively. By suitably engineering the qutrit–resonator coupling rates, we perform a one-step operation of desired qutrit state transfer by the technique of shortcuts to adiabaticity. Owing to the rapidness and robustness of quantum operations, the current scheme is insusceptible to environmental decoherence effects and remains insensitive to control parameter errors. Thus, the scheme could offer a promising route towards scalable superconducting qutrit state transfer.