Quantum simulation of superexchange magnetism in linear ion crystals
arXiv:1405.6071 · doi:10.1103/PhysRevA.90.012325
Abstract
We present a system for the simulation of Heisenberg models with spins and with a linear crystal of trapped ions. We show that the laser-ion interaction induces a Jaynes-Cummings-Hubbard interaction between the atomic V-type level structure and the two phonon species. In the strong-coupling regime the collective atom and phonon excitations become localized at each lattice site and form an effective spin system with varying length. We show that the quantum-mechanical superexchange interaction caused by the second-order phonon hopping processes creates a Heisenberg-type coupling between the individual spins. Trapped ions allow to control the superexchange interactions by adjusting the trapping frequencies, the laser intensity, and the detuning.
arXiv comment9 pages, 6 figures
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