Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany.
Phys Rev Lett. 2014 Jan 31;112(4):043601. doi: 10.1103/PhysRevLett.112.043601. Epub 2014 Jan 27.
We investigate phase shifts in the strong coupling regime of single-atom cavity quantum electrodynamics. On the light transmitted through the system, we observe a phase shift associated with an antiresonance and show that both its frequency and width depend solely on the atom, despite the strong coupling to the cavity. This shift is optically controllable and reaches 140°--the largest ever reported for a single emitter. Our result offers a new technique for the characterization of complex integrated quantum circuits.
我们研究了单原子腔量子电动力学中强耦合状态下的相移。在通过系统传输的光中，我们观察到与反共振相关的相移，并表明尽管与腔强烈耦合，但它的频率和宽度仅取决于原子。这种相移是光可控的，达到 140°--这是迄今为止单个发射器报告的最大相移。我们的结果为复杂集成量子电路的特性提供了一种新技术。
