Hood Jonathan D, Goban Akihisa, Asenjo-Garcia Ana, Lu Mingwu, Yu Su-Peng, Chang Darrick E, Kimble H J
Norman Bridge Laboratory of Physics MC12-33, California Institute of Technology, Pasadena, CA 91125; Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, CA 91125;
Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Barcelona, Spain.
Proc Natl Acad Sci U S A. 2016 Sep 20;113(38):10507-12. doi: 10.1073/pnas.1603788113. Epub 2016 Aug 31.
Tailoring the interactions between quantum emitters and single photons constitutes one of the cornerstones of quantum optics. Coupling a quantum emitter to the band edge of a photonic crystal waveguide (PCW) provides a unique platform for tuning these interactions. In particular, the cross-over from propagating fields [Formula: see text] outside the bandgap to localized fields [Formula: see text] within the bandgap should be accompanied by a transition from largely dissipative atom-atom interactions to a regime where dispersive atom-atom interactions are dominant. Here, we experimentally observe this transition by shifting the band edge frequency of the PCW relative to the [Formula: see text] line of atomic cesium for [Formula: see text] atoms trapped along the PCW. Our results are the initial demonstration of this paradigm for coherent atom-atom interactions with low dissipation into the guided mode.
调整量子发射体与单光子之间的相互作用是量子光学的基石之一。将量子发射体耦合到光子晶体波导（PCW）的带边提供了一个用于调节这些相互作用的独特平台。特别地，从带隙外的传播场[公式：见正文]到带隙内的局域场[公式：见正文]的转变，应该伴随着从主要是耗散性的原子 - 原子相互作用到色散性原子 - 原子相互作用占主导的 regime 的转变。在这里，我们通过相对于沿 PCW 捕获的[公式：见正文]原子的铯原子的[公式：见正文]线移动 PCW 的带边频率，实验性地观察到了这种转变。我们的结果是这种用于与低耗散到导模中的相干原子 - 原子相互作用的范式的初步证明。
