Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK 8000 Aarhus C, Denmark.
Phys Rev Lett. 2013 Jul 19;111(3):033606. doi: 10.1103/PhysRevLett.111.033606. Epub 2013 Jul 17.
We propose a scheme for rapid generation of high fidelity steady-state entanglement between a pair of atoms. A two-photon excitation process toward long-lived Rydberg states with finite pairwise interaction, a dark-state interference effect in the individual atoms, and spontaneous emission from their short-lived excited states lead to rapid, dissipative formation of an entangled steady state. We show that for a wide range of physical parameters, this entangled state is formed on a time scale given by the strengths of coherent Raman and Rabi fields applied to the atoms, while it is only weakly dependent on the Rydberg interaction strength.
我们提出了一种方案，用于快速产生一对原子之间的高保真稳态纠缠。通过向长寿命里德堡态进行双光子激发，以及在单个原子中存在的暗态干涉效应和短寿命激发态的自发辐射，导致纠缠稳态的快速耗散形成。我们表明，对于广泛的物理参数，这个纠缠态的形成时间取决于施加在原子上的相干拉曼和拉比场的强度，而与里德堡相互作用强度的依赖性较弱。
