Holleitner Alexander W, Blick Robert H, Huttel Andreas K, Eberl Karl, Kotthaus Jörg P
Center for NanoScience and Sektion Physik, Ludwig-Maximilians-Universität, Geschwister-Scholl-Platz 1, 80539 München, Germany.
Science. 2002 Jul 5;297(5578):70-2. doi: 10.1126/science.1071215.
We demonstrate how molecular quantum states of coupled semiconductor quantum dots are coherently probed and manipulated in transport experiments. The applied method probes quantum states by the virtual cotunneling of two electrons and hence resolves the sequences of molecular states simultaneously. This result is achieved by weakly probing the quantum system through parallel contacts to its constituting quantum dots. The overlap of the dots' wave functions and, in turn, the splitting of molecular states are adjusted by the direct influence of coupling electrodes.
我们展示了在输运实验中如何对耦合半导体量子点的分子量子态进行相干探测和操控。所应用的方法通过两个电子的虚拟共隧穿来探测量子态，从而同时解析分子态的序列。该结果是通过与构成量子点的量子系统的平行接触对其进行弱探测而实现的。耦合电极的直接影响可调节量子点波函数的重叠，进而调节分子态的分裂。
