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Two-dimensional superexchange-mediated magnetization dynamics in an optical lattice

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Science  01 May 2015:
Vol. 348, Issue 6234, pp. 540-544
DOI: 10.1126/science.aaa1385

Simulating magnetism out of equilibrium

A major goal of quantum simulation is to help us understand problems that are difficult to describe analytically or solve with conventional computers. This goal has been very challenging to reach experimentally, requiring, for example, extremely low temperatures to determine the effects of quantum magnetism in equilibrium. Brown et al. studied a nonequilibrium system of ultracold 87Rb atoms in a two-dimensional optical lattice. They monitored the atoms' dynamics after a sudden change in the lattice parameters and were able to reach a regime where the magnetic interactions dominated the dynamics.

Science, this issue p. 540

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