Quantum process tomography and Linblad estimation of a solid-state qubit
Quantum process tomography and Linblad estimation of a solid-state qubit
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DOI：
10.1088/1367-2630/8/3/033
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发表时间：
2006-03-06
影响因子：
3.3
通讯作者：
Wrachtrup, J
中科院分区：
文献类型：
--
作者：
Howard, M;Twamley, J;Wrachtrup, J
我们提出了一个例子的量子过程层析成像（QPT）上进行一个单一的固态量子比特。使用的量子位是金刚石中氮空位缺陷中三重态的两个能级。QPT被应用于已经被允许退相干三个不同的时间段的量子位。在每种情况下，该过程都是根据。矩阵表示和仿射映射表示。实验估计的过程和最接近的物理上有效的过程之间的差异。使用Boulant等人（2003 Phys.Rev.A67042322）介绍的技术，在三个不同的退相干时间之后执行的QPT的结果用于找到系统的误差生成器或Lindblad算子。
We present an example of quantum process tomography (QPT) performed on a single solid-state qubit. The qubit used is two energy levels of the triplet state in the nitrogen vacancy defect in diamond. QPT is applied to a qubit which has been allowed to decohere for three different time periods. In each case, the process is found in terms of the. matrix representation and the affine map representation. The discrepancy between experimentally estimated process and the closest physically valid process is noted. The results of QPT performed after three different decoherence times are used to find the error generators, or Lindblad operators, for the system, using the technique introduced by Boulant et al (2003 Phys. Rev. A 67 042322).