We propose an implementation scheme for the continuous-time quantum walk
using a diatomic molecule and an optical frequency comb. We show an analogy
between the quantum walk and the cascade rotational transitions induced by the
optical frequency comb whose frequency peaks are tuned to the pure rotational
transitions in the molecule. The strategy to compensate for the centrifugal
distortion of the real molecule is also demonstrated.Comment: 5 pages, 6 figures, submitted to J. Kor. Phys. Soc., Proceedings of
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