Quantized Fields in Nonlinear Dielectric Media: A Microscopic Approach

小行星9602515 这是马克教授和 亨特学院物理系的希勒里， 物理系的彼得·德拉蒙德教授， 澳大利亚昆士兰州大学。 超过三- 在一年的时间里，希勒里教授将多次前往 布里斯班与Drummond博士一起研究 量子化电磁场的传播 非线性介质 这一点很重要， 因为它提供了一个例子， 量子场论的理论基础 从实用的角度来看， 如果要使用这些字段，则必须了解它们 对于光纤中的长距离通信， 提出如 用于治疗的模型 这些现象要么是现象学的，要么是基于 宏观麦克斯韦方程的量子化。 一 量子化描述的微观方法 最近， 在亨特学院开发的。 分散，可以是 量子化场的宏观方法中的一个问题 电介质，自然地被纳入其中， 理论 该描述将扩展到以下介质： 3-原子水平 这将使该理论涵盖 非线性过程，例如参数下转换， 这是二能级原子介质所不能描述的。 的 对口调查人员将主要集中于 场如何从自由空间传播的描述 穿过一个介质，再次出现在自由空间中。 的 有限介质的研究应该允许合作者 研究投入产出理论， 量子光学在更基础的水平，并解决 其中出现的一些问题。分析 和数值技术， 在宏观层面上的发展将补充 首席研究员和他的同事们 是亨特学院在微观模型上开发的。

9602515 Hillery This is a collaborative project between Professor Mark Hillery of the Department of Physics, Hunter College, and Professor Peter Drummond of the Department of Physics, The University of Queensland, Australia. Over a three- year period, Professor Hillery will make several trips to Brisbane to work with Dr. Drummond on the study of the propagation of the quantized electromagnetic field in nonlinear dielectric media. This is important from a fundamental point of view because it provides an example of an experimentally accessible quantum field theory. From a practical point of view, the quantum noise in these fields must be understood if they are to be used for long distance communication in optical fibers as has been proposed. The models which have been used to treat these phenomena are either phenomenological or based on the quantization of the macroscopic Maxwell equations. A microscopic approach to the description of quantized fields in a medium of two-level atoms has recently been developed at Hunter College. Dispersion, which can be a problem in a macroscopic approach to quantized fields in dielectric media, is naturally incorporated into this theory. This description will be extended to a medium of 3-level atoms. This will allow the theory to encompass nonlinear processes, such as parametric down conversion, which were not described by the 2-level atom medium. The counterpart investigators will concentrate primarily on the description of how a field propagates from free space through a medium and emerges again into free space. The study of finite media should allow the collaborators to examine the input-output theories which are used in quantum optics at a more fundamental level and to address some of the problems which arise in them. The analytical and numerical techniques which the Australian counterpart has developed on the macroscopic level will complement what the principal investigator and his colleagues have developed at Hunter College on the microscopic model.