Banchi, Leonardo and Tony, J. G. Apollaro and Cuccoli , Alessandro and Vaia, Ruggero and Verrucchi, Paola (2011) Efficient quantum information transfer through a uniform channel. Nanomaterials and Nanotechnology, 1 (1). pp. 24-28. ISSN 1847-9804
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Effective quantum‐state and entanglement transfer can be obtained by inducing a coherent dynamics in quantum wires with homogeneous intrawire interactions. This goal is accomplished by optimally tuning the coupling between the wire endpoints and the two qubits there attached. A general procedure to determine such value is devised, and scaling laws between the optimal coupling and the length of the wire are found. The procedure is 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 also for very long wires. The present approach does not require engineered intrawire interactions nor a specific initial pulse shaping, and can be applied to a vast class of quantum channels
|Uncontrolled Keywords:||spin chains, dynamics, quantum channels, entanglement|
|Subjects:||Material Science > Nanostructured materials|
|Deposited By:||Mr Sasa Marcan|
|Deposited On:||27 Jun 2011 14:23|
|Last Modified:||01 Jul 2011 08:09|
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