摘要 : We consider a network whose nodes are electromagnetic cavities, each coupled to a single three-level atom.The nodes are connected by optical fibers. Each atom is addressed by a control laser, which along with the cavityfield drive... 展开 We consider a network whose nodes are electromagnetic cavities, each coupled to a single three-level atom.The nodes are connected by optical fibers. Each atom is addressed by a control laser, which along with the cavityfield drives atomic transitions. The network can be in the form of chain or two- and three-dimensional arrays ofN cavities connected by NB fibers. Following the work on a two-cavity system by Pellizzari, we find that undercertain conditions the system possesses two kinds of dark states. The first kind are N states corresponding toatomic excitations at each node and these are our logical states for quantum processing. The second kind are NBdegenerate dark states on pairs of sites connected by a fiber. By manipulating intensities and phases of controllasers on the cavities, one can pass adiabatically among these dark states due to their degeneracy. This networkoperates as an N-level quantum system in which one can generate computationally useful states by protocolsof external controls. We obtain numerical results for small chains and lattices to demonstrate some quantumoperations such as the transport of states across the array, generation of W states, and Fourier-like states.We alsodiscuss effects of dissipation and limitations of the model. 收起