3 research outputs found
Perfect transfer of coherent state-based qubits via coupled cavities
Motivated by the need for communication of coherent state-based qubits in
quantum computers, we introduce a method for perfect transferring of an
arbitrary superposition of coherent states between two distant nodes of a
linear array of three semiconductor QDs. The QDs trapped in a system of coupled
cavities. In this method, the field mode of the cavities, as the resource of
transferring of quantum states, are only virtually excited which minimizes the
effect of decoherence due to photon loss.Comment: 10 pages, 3 figures. arXiv admin note: text overlap with
arXiv:quant-ph/0211055 by other author
Perfect routing of quantum information in regular cavity QED networks
We introduce a scheme for perfect routing of quantum states and entanglement
in regular cavity QED networks. The couplings between the cavities are
quasi-uniform and each cavity is doped with a two-level atom. Quasi-uniform
couplings leads the system to evolve in invariant subspaces. Combination the
evolutions of the system in its invariant subspaces with quite simple local
operations on atoms in the networks, gives the perfect routing of quantum
states and entanglement through the network. To provide the protocol be robust
due to decoherence arisen from photon loss, the field mode of the cavities are
only virtually excited