Reduced density matrix approach to phononic dissipation in friction

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Date

2000-10-15

Author

Özpineci, Altuğ
Leitner, D.M.
Ciraci, S.

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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 method 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 an asperity on a surface. The frequency and temperature dependence of the relaxation time is also determined. Predictions of the reduced density matrix are compared with those obtained by using the Golden Rule approach.

URI

https://hdl.handle.net/11511/107586

Journal

Physical Review B - Condensed Matter and Materials Physics

DOI

https://doi.org/10.1103/physrevb.62.10558

Collections

Department of Physics, Article

Citation Formats

A. Özpineci, D. M. Leitner, and S. Ciraci, “Reduced density matrix approach to phononic dissipation in friction,” Physical Review B - Condensed Matter and Materials Physics, vol. 62, no. 15, pp. 10558–10564, 2000, Accessed: 00, 2023. [Online]. Available: https://hdl.handle.net/11511/107586.