%0 Journal Article
%J arXiv
%D 2008
%T Quantum information processing in spin chains via quantum Zeno dynamics
%A Monras, Alex
%A Romero-Isart, Oriol
%K spin chain
%X We show how the quantum Zeno effect can be exploited to control quantum information in a spin chain in a flexible way. In particular, we consider a one dimensional array of three level systems interacting via a swap operator, an interaction found in a generalized Heisenberg Hamiltonian. By encoding the qubit into two levels and using simple projective frequent measurements, the dynamics of the chain is guided to achieve basic quantum information manipulation tools, $\backslash$emph\{i.e.\}, quantum registers, single qubit operations and quantum state transfer on demand, while local addressability is not required. State transfer is perfect, robust against errors and delivers qubits at a constant rate, unconditional of the length of the transfer. Moreover, two dimensional lattices with tunable global interactions in different directions offer the possibility of performing two-qubit gates.
%B arXiv
%8 01/2008
%G eng
%U http://arxiv.org/abs/0801.1959
%0 Journal Article
%J New Journal of Physics
%D 2007
%T Efficient quantum-state transfer in spin chains via adiabatic passage
%A Eckert, Kai
%A Romero-Isart, Oriol
%A Sanpera, Anna
%K spin chain
%K state transfer
%B New Journal of Physics
%V 9
%P 155
%G eng
%U http://iopscience.iop.org/1367-2630/9/5/155/pdf/1367-2630\_9\_5\_155.pdf
%0 Journal Article
%J Physical Review A (Atomic, Molecular, and Optical Physics)
%D 2007
%T Quantum state transfer in spin-1 chains
%A Romero-Isart, Oriol
%A Eckert, Kai
%A Sanpera, Anna
%K ferromagnetic materials
%K ground states
%K Heisenberg model
%K magnetic transitions
%K quantum entanglement
%K spin chain
%K spin systems
%K state transfer
%B Physical Review A (Atomic, Molecular, and Optical Physics)
%V 75
%P 050303–4
%8 05/2007
%G eng
%U http://link.aps.org/abstract/PRA/v75/e050303
%R 10.1103/PhysRevA.75.050303