论文标题
人造原子合奏中的室温量子相干复兴
Room Temperature Quantum Coherent Revival in an Ensemble of Artificial Atoms
论文作者
论文摘要
我们报告了量子光学的标志性概念的演示：量子点（QD）室温集合中量子相干性（QCR）的周期性崩溃和复兴。对QCR固有的量子状态的控制，以及动态QD属性，为实用的室温构建块的量子信息处理提供了机会。 QCR的振幅衰减由QD均匀的线宽决定，因此可以在双脉冲Ramsey型实验中提取其提取。还调用了更常见的光子回声技术并产生相同的线宽。测量的横向松弛时间的电偏偏和温度依赖性可以确定两种主要的分解机制：载体 - 载体和载波散射。
We report a demonstration of the hallmark concept of quantum optics: periodic collapse and revival of quantum coherence (QCR) in a room temperature ensemble of quantum dots (QD). Control over quantum states, inherent to QCR, together with the dynamical QD properties present an opportunity for practical room temperature building blocks of quantum information processing. The amplitude decay of QCR is dictated by the QD homogeneous linewidth, thus, enabling its extraction in a double-pulse Ramsey-type experiment. The more common photon echo technique was also invoked and yielded the same linewidth. Measured electrical bias and temperature dependencies of the transverse relaxation times enable to determine the two main decoherence mechanisms: carrier-carrier and carrier-phonon scatterings.
