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Two-qubit quantum logic gates via optical Feshbach resonances in alkaline-earth-like atoms

Iris Reichenbach, University of New Mexico

(Session 2 : Friday from 11:15-11:45)

Abstract. The ability to implement quantum information processing in neutral atoms hinges critically on the ability to coherently control both the internal states and the interactions between two such atoms. We show that alkaline-earth-like atoms are uniquely suited to the task of quantum computing, due to their rich but controllable internal structure, including the nuclear spin, and their very narrow 1S0 -> 3P1 intercombination transition, which makes the application of optical Feshbach resonances possible. Optical Feshbach resonances allow for fine tuning of the interaction strength over a wide range, even making it possible to completely turn off the interaction, thus improving the coherence time. Theoretical modeling of the optical Feshbach resonance on the example of 171Yb shows their potential in the implementation of two qubit gates through nuclear spin exchange.