Rotational dynamics of CO solvated in small He clusters: a quantum Monte Carlo study
Paolo Cazzato, Stefano Paolini, Saverio Moroni, Stefano Baroni
Abstract
The rotational dynamics of CO single molecules solvated in small He clusters (CO@HeN) has been studied using Reptation Quantum Monte Carlo for cluster sizes up to N=30. Our results are in good agreement with the roto-vibrational features of the infrared spectrum recently determined for this system, and provide a deep insight into the relation between the structure of the cluster and its dynamics. Simulations for large N also provide a prediction of the effective moment of inertia of CO in the He nano-droplet regime, which has not been measured so far.
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