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Reduced Density Matrix Approach to Phononic Dissipation in Friction

A. Ozpineci·D. M. Leitner·S. Ciraci
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Abstract

Understanding mechanisms for energy dissipation from nanoparticles in contact with large samples is a central problem in describing friction microscopically. Calculation of the reduced density matrix appears to be the most suitable metho to study such systems that are coupled to a large environment. In this paper the time evolution of the reduced density matrix has been evaluated for an arbitrary system coupled to a heat reservoir. The formalism is then applied to study the vibrational relaxation following the stick-slip motion of a small adsorbate on a surface. The frequency dependence of the relaxation time is also determined.

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A. Ozpineci, D. M. Leitner, S. Ciraci. 1999-09-09. Reduced Density Matrix Approach to Phononic Dissipation in Friction. https://doi.org/10.1103/physrevb.62.10558

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