Speaker: Dr. Wen-Xi Lai, Beijing Computational Science Research Center

Abstract: The quantum optical devices based on a photonic crystal microcavity coupled to waveguides are investigated. Especially, the all optical controlled switching and cavity QED beam splitter are studied in detail. We show that one can control the path of an optical field propagating in a waveguide with another optical field in a cavity–waveguide system. The strong coupling between the two optical fields is achieved using cavity–QED based on dipole-induced transparency and an optical Stark shift. The general transformation of this beam splitter gives a single-qubit rotation operator about the x axis. Using such beam splitters, we show single-photon interference via the Mach-Zehnder interferometer and two-photon entanglement via Hong-Ou-Mandel effect.

Date&Time: December 27, 2013 (Friday), 14:30–15:30
Location: 606 Conference Room