Welcome to the home page of Professor Jeff Kimble's quantum optics group at Caltech.
The primary goal of our research is to study the quantum mechanics of open systems. "Real-world" quantum mechanics takes into account the dissipation and decoherence that arise from interactions of a quantum system with its environment. In studying the role of these processes, we learn about what is and might be possible: how we might make, study, and preserve quantum superpositions and other exotic states.
"Strong Interactions of Single Atoms and Photons near a Dielectric Boundary", D. J. Alton, N. P. Stern, Takao Aoki, H. Lee, E. Ostby, K. J. Vahala & H. J. Kimble, Nature Phys. 7, 159-165 (2011)
Multipartite Entanglement for One Photon Shared Among Four Optical
Modes", S. B. Papp, K. S. Choi, H. Deng, P. Lougovski, S. J. van Enk
& H. J. Kimble, Science
324, 764 (2009) Caltech
Cavity quantum electrodynamics is one of the few experimentally viable systems in which the intrinsic quantum mechanical coupling dominates losses due to dissipation. We investigate the use of strong coupling to control the simple quantum system of one atom interacting with a single photon in an optical cavity.
A recent application of this strongly coupled atom-cavity system has been the experimental realization of a one-atom laser. Here the macroscopic amplification medium of a conventional laser is replaced by a single cesium atom confined within a high-finesse cavity. While everyday lasers generate classical (coherent) light, the one-atom laser produces light with interesting quantum mechanical characteristics.
Quantum Networking with Atomic Ensembles
We are working to realize cQED phenomena using toroidal whispering-gallery-mode (WGM) optical microcavities and cesium atoms. Toroidal WGM optical microcavities are chip based resonators which resonantly confine light to small volumes with extremely low losses, giving rise to extremely high quality factors, "Q," and strong coupling, "g," between the resonator and atoms. Toroidal cavities have the potential to surpass their Fabry-Perot counterparts due to their ultra-high Q, reduced mode volume, and ease of manufacture and control. In addition, the "on-chip" design and optical fiber coupling scheme could potentially allow integration into a quantum network. In collaboration with the Vahala research group in the Applied Physics department at Caltech, our initial goal is to demonstrate coupling between a cesium atom and a microtoroidal resonator.
Quantum interference and frequency metrology, squeezed light, and more...
We would like to acknowledge the support of the following funding agencies: National Science Foundation, Caltech MURI on Quantum Networks (administered by the Army Research Office), Office of Naval Research, DARPA (through the ARO), and Advanced Research and Development Activity (ARDA).
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last modified on 10/01/2008.