He Yang, Zhang Yu-Xiang
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
University of Chinese Academy of Sciences, School of Physical Sciences, Beijing 100049, China.
Phys Rev Lett. 2025 Jan 17;134(2):023602. doi: 10.1103/PhysRevLett.134.023602.
Large-scale fault-tolerant superconducting quantum computation needs rapid quantum communication to network qubits fabricated on different chips and long-range couplers to implement efficient quantum error correction codes. Quantum channels used for these purposes are best modeled by multimode resonators, which lie between single-mode cavities and waveguides with a continuum of modes. In this Letter, we propose a non-Markovian formalism for quantum state transfer using coupling strengths comparable to the channel's free spectral range (g∼Δ_{FSR}). Our scheme merges features of both the stimulated-Raman-adiabatic-passage-based methods for single-mode cavities and the pitch-and-catch protocol for long waveguides, integrating their advantages of low loss and high speed. It is immune to thermal channel occupations if using harmonic resonators for the sender and receiver.
大规模容错超导量子计算需要快速的量子通信来连接在不同芯片上制造的量子比特以及长程耦合器，以实现高效的量子纠错码。用于这些目的的量子通道最好用多模谐振器来建模，多模谐振器介于具有连续模式的单模腔和波导之间。在本信函中，我们提出了一种非马尔可夫形式主义，用于使用与通道的自由光谱范围相当的耦合强度（g∼Δ_{FSR}）进行量子态转移。我们的方案融合了基于受激拉曼绝热通道的单模腔方法和长波导的俯仰捕捉协议的特点，整合了它们低损耗和高速的优点。如果发送器和接收器使用谐波谐振器，它对热通道占据具有免疫力。
