Saffman M, Mølmer K
Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA.
Phys Rev Lett. 2009 Jun 19;102(24):240502. doi: 10.1103/PhysRevLett.102.240502. Epub 2009 Jun 17.
We present an efficient method for producing N particle entangled states using Rydberg blockade interactions. Optical excitation of Rydberg states that interact weakly, yet have a strong coupling to a second control state is used to achieve state dependent qubit rotations in small ensembles. On the basis of quantitative calculations, we predict that an entangled quantum superposition state of eight atoms can be produced with a fidelity of 84% in cold Rb atoms.
我们提出了一种利用里德堡阻塞相互作用产生N粒子纠缠态的有效方法。利用与第二控制态弱相互作用但具有强耦合的里德堡态的光激发，在小原子系综中实现与状态相关的量子比特旋转。基于定量计算，我们预测在冷铷原子中可以产生保真度为84%的八个原子的纠缠量子叠加态。
