Sub-10 attoseconds manipulation of quantum phases and single-molecule quantum computing

量子相的亚 10 阿秒操纵和单分子量子计算

基本信息

批准号：
15204034
负责人：
OHMORI Kenji
金额：
$ 27.79万
依托单位：
Institute for Molecular Science (2004-2005)Okazaki National Research Institutes (2003)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15204034/
关键词：
wave packet attosecond quantum interference coherent control quantum information quantum phase molecule quantum computer

项目摘要

We have succeeded in controlling quantum interference of two vibrational wave-packets in a molecule almost completely, and in observing its temporal evolution in real time. In this real-time observation, we have demonstrated that the temporal evolution of a wave packet is sensitive to the relative phases among the vibrational eigenstates within the wave packet. By using our high-precision interferometric technique, it is possible to read and write a "population code" which is a population ratio among the vibrational eigenstates of a molecule. In the present study, we have demonstrated that the combination of the real-time observation and the population code can provide full quantum information of a wave packet. Moreover we have developed a novel technique to visualize quantum standing-waves (quantum ripples) generated transiently by the wave-packet interference with picometer and femtosecond spatiotemporal resolution. Very recently we have succeeded in tailoring such a visualized spatiotemporal Image (quantum fabric).We have also succeeded in developing a molecular memory based on our advanced interferometric techniques. This molecular memory is a quantum memory where each vibrational eigenstate serves as a bit, and both amplitude and phase information can be read and written. The superposition of those vibrational eigenstates can be used as a qubit. Moreover we have developed quantum gate and algorithm to apply this molecular memory to quantum information processing. A series of these achievements indicates a possibility of molecule-based optical-phase memory and quantum computer.

我们已经成功地几乎完全控制了分子中两个振动波包的量子干涉，并实时观察了其时间演化。在这种实时观察中，我们证明了波包的时间演化对波包内振动本征态之间的相对相位敏感。通过使用我们的高精度干涉技术，可以读取和写入“种群代码”，即分子振动本征态之间的种群比率。在本研究中，我们证明了实时观测和布居码的结合可以提供波包的完整量子信息。此外，我们还开发了一种新技术，可以以皮米和飞秒时空分辨率可视化波包干扰瞬时产生的量子驻波（量子波纹）。最近，我们成功地定制了这样一个可视化的时空图像（量子结构）。我们还成功地开发了基于先进干涉技术的分子存储器。这种分子存储器是一种量子存储器，其中每个振动本征态充当一个比特，并且可以读取和写入幅度和相位信息。这些振动本征态的叠加可以用作量子位。此外，我们还开发了量子门和算法，将这种分子存储器应用于量子信息处理。这些一系列成就表明了基于分子的光相位存储器和量子计算机的可能性。