Fermionic stabilization and density-wave ground state of a polar condensate

We examine the stability of a trapped dipolar condensate mixed with a single-component fermion gas at T=0. Whereas pure dipolar condensates with a small s-wave interaction are unstable even at small dipole-dipole interaction strength, we find that the admixture of fermions can significantly stabilize them, depending on the strength of the boson-fermion interaction. Within the stable regime we find a region where a ground state is characterized by a density wave along the soft trap direction.     

The van Cittert-Zernike theorem in atom optics

The van Cittert-Zernike theorem of classical optics is generalized to the situation of matter-wave optics. Applying a Green's function method the first- and second-order correlation functions of the matter field emitted from an incoherent source are calculated, and the results are compared to the case of electromagnetic waves.     

A short walk through quantum optomechanics

This paper gives a brief review of the basic physics of quantum optomechanics and provides an overview of some of its recent developments and current areas of focus. It first outlines the basic theory of cavity optomechanical cooling and gives a brief status report of the experimental state‐of‐the‐art. It then turns to the deep quantum regime of operation of optomechanical oscillators and covers selected aspects of quantum state preparation, control and characterization, including mechanical squeezing and pulsed optomechanics. This is followed by a discussion of the “bottom‐up” approach that exploits ultracold atomic samples instead of nanoscale systems. It concludes with an outlook that concentrates largely on the functionalization of quantum optomechanical systems and their promise in metrology applications.     

量子超化学中的类双缝干涉:玻色-爱因斯坦凝聚原子-三聚物相干转化

文章作者首次研究了玻色凝聚体中原子与三原子异核分子间的相干转化过程,特别是双通道量子干涉效应的作用,该效应可以看作是量子简并物质波化学中的类双缝干涉.利用相长干涉可以进一步提高分子制备过程的产率,为异核分子的产生和相干调控提供了一个新的技术.此工作发表在2007年第9卷第133002页的Phys.Rev.Lett 上.