Quantum Logic Gates in Optical Lattices

Center for Advanced Studies, Department of Physics and Astronomy,

University of New Mexico, Albuquerque, NM 87131 

 

* Optical Sciences Center, University of Arizona, Tucson, AZ 85721

We propose a new system for implementing quantum logic gates: neutral atoms trapped in a very far-off-resonance optical lattice. Pairs of atoms are made to occupy the same well by varying the polarization of the trapping lasers, and then a near-resonant electric dipole is induced by an auxiliary laser. A controlled-NOT can be implemented by conditioning the target atomic resonance on a resolvable level shift induced by the control atom. Atoms interact only during the logical operations, thereby suppressing decoherence.

Physical Review Letters 82, 1060 (1999).

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