Coupling-induced transition of states in an asymmetrical double-well potential

Wei Wu and Jing-Dong Bao

Physica A: Statistical Mechanics and its Applications, 2004, vol. 338, issue 3, 417-424

Abstract: Time-dependent picture of two harmonically coupled particles passing over an asymmetrical barrier and then distributing over a double-well potential is considered. The coupling-induced transition of states is investigated through calculating the survival probability of the center-of-mass of two particles in a metastable state. The results show that the center-of-mass of two coupled particles passing over a smooth barrier is easier than a single particle; the survival probability of the center-of-mass of two particles in the metastable state of double-well potential can be larger than 12. This can be well explained by an effective potential of the center-of-mass of two particles feeling, namely, the minimum of the metastable well with a small curvature is risen lower than that of the stable well with a large curvature.

Keywords: Survival probability; State transition; Two coupled particles; Asymmetrical double-well potential (search for similar items in EconPapers)
Date: 2004
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:338:y:2004:i:3:p:417-424

DOI: 10.1016/j.physa.2004.02.067

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