In this talk I will show that effective quantum-state and entanglement transfer can be obtained by inducing a coherent dynamics in quantum wires with homogeneous intrawire interactions, by simply tuning the coupling between the wire endpoints and the two qubits there attached, to an optimal value. A general procedure to determine such value is devised, and then specifically implemented in the case of a wire consisting of a spin-1/2 XY chain. Results for the time dependence of the quantities which characterize quantum-state and entanglement transfer are found of extremely good quality and almost independent of the wire length. The present approach does not require ad hoc engineering of the intrawire interactions nor a specific initial pulse shaping, and can be applied to a vast class of physical systems which can be used as quantum channels.
|Other STFC||News||Site Sections||Important Links|