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Phys Rev Lett. 2003 Aug 29;91(9):090402. Epub 2003 Aug 26.

Controlling spin exchange interactions of ultracold atoms in optical lattices.

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1
Institute for Quantum Information, California Institute of Technology, mc 107-81, Pasadena, CA 91125, USA.

Abstract

We describe a general technique that allows one to induce and control strong interaction between spin states of neighboring atoms in an optical lattice. We show that the properties of spin exchange interactions, such as magnitude, sign, and anisotropy, can be designed by adjusting the optical potentials. We illustrate how this technique can be used to efficiently "engineer" quantum spin systems with desired properties, for specific examples ranging from scalable quantum computation to probing a model with complex topological order that supports exotic anyonic excitations.

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