Quantum Annealing of a Disordered Magnet

Details Quantum Annealing of a Disordered Magnet Quantum Annealing of a Disordered Magnet

2001-05-11

arxiv.org/abs/cond-mat/0105238v1

J. Brooke, D. Bitko, T. F. Rosenbaum, & G. Aeppli, "Quantum Annealing of a Disordered Magnet," Science 284, 779-781 (30 April

Physics

Condensed Matter

10 pages, 5 figures

Scientific paper

Traditional simulated annealing utilizes thermal fluctuations for convergence in optimization problems. Quantum tunneling provides a different mechanism for moving between states, with the potential for reduced time scales. We compare thermal and quantum annealing in a model disordered Ising magnet, Li\sub{Ho}{0.44}\sub{Y}{0.56}\sub{F}{4}, where the effects of quantum mechanics can be tuned in the laboratory by varying a magnetic field applied transverse to the Ising axis. Our results indicate that quantum annealing indeed hastens convergence to the optimum state.

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