Basic researvh on the quantum control of particles and radiation field

我们小组的目标是研究一个简单系统中物质和光之间的量子力学相互作用，并为其他研究微球和半导体的小组提供支持。Ohtsu等人在光纤尖端上的技术促进了使用SNOM技术的工作的进展。本课题组的理论成果包括量子计算机元件的新提出、量子芝诺效应和近场光场的广泛分析。Kitagawa提出了一种利用有机分子核磁共振的量子计算机元件，并设计了利用宇称门提取计算结果的方法。北野讨论了量子芝诺效应与量子系统绝热演化之间的关系。Cho等人从第一原理出发详细讨论了材料的近场光学响应。他们给出了一个可以应用于孤子理论、x射线动态衍射和光子带理论的广义公式。这一理论为其他小组的实验工作提供了理论分析。在实验方面，Inoue等人首次在一微米波长区域制造了二维光子带晶体，并观察到掺杂晶体与激光的新作用。他们还用硅晶体在微波区开发了三维光子带晶体。Shimizu等人研究了激光冷却的亚稳态氖原子。他们研究了光学晶格动力学、超冷碰撞的量子统计特性和两原子相关光谱。他们还开发了用于中性原子束和原子全息摄影的微波透镜。

The object of our group is to study quantum mechanical interactions between matter and light in a simple system and to provide support for other groups working with micro-spheres and semiconductors. The technique by Ohtsu et al on the optical fiber tips contributed to the progress of the works that use SNOM technique. Theoretical achievements of our group include new proposal of quantum computer elements, Quantum Zeno effect and an extensive analysis of near field optical fields. Kitagawa proposed a quantum computer elements that uses nuclear magnetic resonance of organic molecules and designed the method to extract the computed results by using parity gates. Kitano discussed the relation between the quantum Zeno effeet and adiabatic evolution of a auantum system. Cho et al discussed in detail near field optical response of materials from the first principle. They gave a generalized formulae that can be applied to the soliton theory, dynamic diffration of X-ray and photonic band theory. The theory contributed to the theoretical analysis of experimental works of other groups. On the experimental side, Inoue et al produced for the first time a two-dimensional photonic band crystal in one micron wavelength region and observed new laser action with a doped crystal. They developed also three dimensional photonic band crystals in microwave region with silicon crystals. Shimizu et al worked with laser-cooled metastable neon atoms. They studied dynamics of optical lattices, quantum statistical characteristics of ultra-cold collisions and two atom correlation spectra. They developed also microwave lens for neutral atomic beam and atom holography.