Jendrzejewski F, Eckel S, Tiecke T G, Juzeliūnas G, Campbell G K, Jiang Liang, Gorshkov A V
Kirchhoff Institut für Physik, Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany.
Joint Quantum Institute, NIST/University of Maryland, College Park, Maryland 20742, USA.
Phys Rev A (Coll Park). 2016;94. doi: 10.1103/PhysRevA.94.063422.
We propose a method for creating far-field optical barrier potentials for ultracold atoms with widths that are narrower than the diffraction limit and can approach tens of nanometers. The reduced widths stem from the nonlinear atomic response to control fields that create spatially varying dark resonances. The subwavelength barrier is the result of the geometric scalar potential experienced by an atom prepared in such a spatially varying dark state. The performance of this technique, as well as its applications to the study of many-body physics and to the implementation of quantum-information protocols with ultracold atoms, are discussed, with a focus on the implementation of tunnel junctions.
我们提出了一种为超冷原子创建远场光学势垒的方法，该势垒宽度比衍射极限更窄，可接近几十纳米。宽度的减小源于原子对控制场的非线性响应，这些控制场会产生空间变化的暗共振。亚波长势垒是处于这种空间变化暗态的原子所经历的几何标量势的结果。我们讨论了该技术的性能及其在多体物理研究和超冷原子量子信息协议实现中的应用，重点是隧道结的实现。
