Numerical Study on Quantum Walks Implemented on the Cascade Rotational Transitions in a Diatomic Molecule

TL;DR

This paper proposes a method to implement continuous-time quantum walks using diatomic molecules and optical frequency combs, demonstrating how to compensate for molecular distortions and establish an analogy with quantum walk dynamics.

Contribution

It introduces a novel scheme for realizing quantum walks in molecular systems using optical frequency combs, including a strategy to address centrifugal distortion effects.

Findings

Successful analogy between quantum walks and molecular rotational transitions

Method to compensate for centrifugal distortion in molecules

Potential for quantum simulation using molecular systems

Abstract

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.