标题： 短时间量子比特退相干模型 显示英文标题

标题： Models of Short-Time Qubit Decoherence

摘要： 我们比较了在低温下对两个状态量子系统与环境弱耦合时退相干评估的方法。 通过分析一个精确可解的模型，我们证明非马尔可夫近似方案在适用于量子计算设计评估的时间尺度上能够给出减少密度矩阵的良好估计。 显示英文摘要

摘要： We compare approaches to evaluation of decoherence at low temperatures in two-state quantum systems weakly coupled to the environment. By analyzing an exactly solvable model, we demonstrate that a non-Markovian approximation scheme yields good quality estimates of the reduced density matrix for time scales appropriate for evaluation of quantum computing designs.