Fully quantum mechanical dynamic analysis of single-photon transport in a single-mode waveguide coupled to a traveling-wave resonator

We analyze the dynamics of single photon transport in a single-mode waveguide coupled to a micro-optical resonator using a fully quantum mechanical model. We examine the propagation of a single-photon Gaussian packet through the system under various coupling conditions. We review the theory of single photon transport phenomena as applied to the system and we develop a discussion on the numerical technique we used to solve for dynamical behavior of the quantized field. To demonstrate our method and to establish robust single photon results, we study the process of adiabatically lowering or raising the energy of a single photon trapped in an optical resonator under active tuning of the resonator. We show that our fully quantum mechanical approach reproduces the semi-classical result in the appropriate limit and that the adiabatic invariant has the same form in each case. Finally, we explore the trapping of a single photon in a system of dynamically tuned, coupled optical cavities.Comment: 24 pages, 10 figure

Oral Health Quality Improvement in the Era of Accountability

The purpose of this report is to review the current status and trends in quality measurement and improvement and describe efforts underway to expand and enhance those efforts. The report will also describe opportunities to use emerging oral health measurement and quality improvement systems to improve and maintain the oral health of the U.S. population

Molecular Biology of the Cell

ry experiments revealed that there is a single copy of GCP5 and multiple copies of #-tubulin, GCP2, GCP3, and GCP4 within the #-tubulin complex. Thus, the #-tubulin complex is conserved in structure and function, suggesting that the mechanism of microtubule nucleation is conserved. INTRODUCTION Microtubules are complex polymers composed of #/#-tubu- lin heterodimers assembled head-to-tail in protofilaments, which are arranged in a hollow cylinder (Tilney et al., 1973). Microtubules have a distinct polarity derived from the asymmetry of the #/#-tubulin heterodimer; one end of the microtubule is fast growing and is designated the plus end, whereas the other end is slow growing and is designated the minus end. In animal cells, most microtubules are nucleated by the microtubule organizing center, or centrosome. The centrosome is composed of a pair of centrioles that are surrounded by pericentriolar material. Microtubules are oriented with the minus ends at the centrosome and the plu