Physics – Condensed Matter
Scientific paper
1999-09-09
Physics
Condensed Matter
16 pages, 3 figures (included), revtex
Scientific paper
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.
Ciraci Salim
Leitner David M.
Ozpineci Altug
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