AI 中文总结
针对环境噪声抑制的关键挑战，提出基于量子滤波器电路的方案，可保护量子态免受振幅阻尼噪声影响，为量子态保护提供资源高效的途径。
AI 中文摘要
所有实际量子系统都不可避免地与环境接触，抑制环境噪声的影响是前沿量子技术中的关键挑战。本研究引入并系统分析了一种基于名为量子滤波器的电路结构，用于保护量子态免受振幅阻尼（AD）噪声影响的方案。研究考察了采用单控制和多控制量子比特的滤波电路，讨论了它们在提升态保护保真度同时保持高成功概率的能力。此外，对于多体量子比特态，固定量子汉明重量的那些态可完美抵御AD噪声，而具有最大汉明重量差的态则为可实现的保护保真度设定了下限。本研究为无需完整量子纠错的量子态保护提供了一种资源高效的途径。
英文摘要
All realistic quantum systems are inevitably in contact with the environment. Suppressing theimpact of environmental noise is a critical challenge in cutting-edge quantum technologies. In thiswork, we introduce and systematically analyze a scheme for the protection of quantum states againstamplitude-damping (AD) noise based on the circuit structure called the quantum filter. Filtrationcircuits employing single- and multi-control qubits are examined, and their capability to enhance stateprotection fidelity while preserving a high success probability is discussed. Moreover, for many-bodyqubit states, those with a fixed quantum Hamming weight can be perfectly protected against ADnoise, whereas states with the largest Hamming weight difference set a lower bound on the achievableprotection fidelity. Our work provides a resource-efficient route for quantum state protection withoutrequiring full quantum error correction.
