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<p>Quantum remote preparation enables effective information transmission. However, bidirectional multi-particle state transmission still often requires auxiliary resources. This paper addresses this issue by proposing a new auxiliary-free bidirectional cyclic preparation scheme, which realizes bidirectional cyclic transmission of single-qubit, two-qubit, and three-qubit states. The quantum channel is constructed by David, with Alice, Bob, and Charlie holding the respective particles; receivers can deterministically recover the target state using measurement results and simple local operations. Under amplitude-damping and phase-damping noise, the fidelity of output states is determined either jointly by the decoherence rate and the input quantum state or solely by the decoherence rate. Compared with existing schemes, the proposed scheme offers advantages in the number of transmitted qubits, classical communication cost, and efficiency. With reduced classical resources and local operations, it is more suitable for efficient quantum state sharing and distributed quantum computing applications.</p>

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A new controlled bidirectional circular scheme for remote preparation in noisy environment

  • 期刊论文

  • 发表日期：

    2026年4月27日

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  • Yi-Ru Sun,
  • Haibo Hong,
  • Jun Shao,
  • Yi-Xian Yang

摘要

Quantum remote preparation enables effective information transmission. However, bidirectional multi-particle state transmission still often requires auxiliary resources. This paper addresses this issue by proposing a new auxiliary-free bidirectional cyclic preparation scheme, which realizes bidirectional cyclic transmission of single-qubit, two-qubit, and three-qubit states. The quantum channel is constructed by David, with Alice, Bob, and Charlie holding the respective particles; receivers can deterministically recover the target state using measurement results and simple local operations. Under amplitude-damping and phase-damping noise, the fidelity of output states is determined either jointly by the decoherence rate and the input quantum state or solely by the decoherence rate. Compared with existing schemes, the proposed scheme offers advantages in the number of transmitted qubits, classical communication cost, and efficiency. With reduced classical resources and local operations, it is more suitable for efficient quantum state sharing and distributed quantum computing applications.