Lukin M D, Fleischhauer M, Cote R, Duan L M, Jaksch D, Cirac J I, Zoller P
ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.
Phys Rev Lett. 2001 Jul 16;87(3):037901. doi: 10.1103/PhysRevLett.87.037901. Epub 2001 Jun 26.
We describe a technique for manipulating quantum information stored in collective states of mesoscopic ensembles. Quantum processing is accomplished by optical excitation into states with strong dipole-dipole interactions. The resulting "dipole blockade" can be used to inhibit transitions into all but singly excited collective states. This can be employed for a controlled generation of collective atomic spin states as well as nonclassical photonic states and for scalable quantum logic gates. An example involving a cold Rydberg gas is analyzed.
我们描述了一种用于操纵存储在介观系综集体态中的量子信息的技术。量子处理是通过光激发到具有强偶极 - 偶极相互作用的态来完成的。由此产生的“偶极阻塞”可用于抑制除单激发集体态之外的所有跃迁。这可用于可控地生成集体原子自旋态以及非经典光子态，并用于可扩展的量子逻辑门。分析了一个涉及冷里德堡气体的例子。
