Superradiance in various systems: cooperative effects and applications Abstract: Cooperative effects are interesting quantum many-body phenomena where the collective quantum coherence play significant roles. Superradiance, an important example of such phenomena, is a dramatic increase in spontaneous radiation as the emitted photon of the first particle stimulates its neighbors to emit cooperatively. This many-body enhancement can be very useful in studying ultracold molecules, e.g., laser cooling. The superradiance effect results in a much larger spontaneous decay rate and hence can potentially improve the cooling efficiency. We further investigate multilevel particles, which serve a good approximate for the low-lying quasiharmonic vibrational levels of polar molecules. Our investigation of superradiance can therefore be applied to such systems and can help manipulation, e.g., to cool vibrational states. Biography: He is currently a Postdoctoral Fellow in Department of Physics, Harvard University. He received his BS and MS in National Taiwan University and completed his PhD in Physics at University of Michigan. |