用无退相干子空间的方法抑制集体退相干,实现不受比特反转错误影响的通用量子计算.该方案基于腔电动力学系统,用囚禁于腔中的2个相邻原子编码1个逻辑比特,构造出抑制集体比特反转错误的4维无退相干子空间.通过调节外加光场与腔的耦合,在无退相干子空间中完成了2个非对易的单比特操作和控制相位门,实现了克服集体比特反转错误的通用量子计算.
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