Efficient quantum state transfer in spin chains via adiabatic passage

Details Efficient quantum state transfer in spin chains via adiabatic passage Efficient quantum state transfer in spin chains via adiabatic passage

2007-02-08

arxiv.org/abs/quant-ph/0702082v2

New J. Phys. 9, 155 (2007)

Physics

Quantum Physics

14 pages, 6 figures, to be published in New J. Phys

Scientific paper

10.1088/1367-2630/9/5/155

We propose a method for quantum state transfer in spin chains using an adiabatic passage technique. Modifying even and odd nearest-neighbour couplings in time allows to achieve transfer fidelities arbitrarily close to one, without the need for a precise control of coupling strengths and timing. We study in detail transfer by adiabatic passage in a spin-1 chain governed by a generalized Heisenberg Hamiltonian. We consider optimization of the transfer process applying optimal control techniques. We discuss a realistic experimental implementation using cold atomic gases confined in deep optical lattices.

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