Quantum-state transfer in imperfect artificial spin networks
Mauro Paternostro, G. Massimo Palma, M. S. Kim +1 more
High-fidelity quantum computation and quantum state transfer are possible in short spin chains. We exploit a system based on a dispersive qubit-boson interaction to mimic XY coupling. In this model, the usually assumed nearest-neighbor coupling is no longer valid: all the qubits are mutually coupled. We analyze the performances of our model for quantum state transfer showing how preengineered coupling rates allow for nearly optimal state transfer. We address a setup of superconducting qubits coupled to a microstrip cavity in which our analysis may be applied.
arXiv:quant-ph/0407058•Physical Review A•Apr 5, 2005•65 citations