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Titolo:
Reduced density matrix approach to phononic dissipation in friction
Autore:
Ozpineci, A; Leitner, DM; Ciraci, S;
Indirizzi:
Bilkent Univ, Dept Phys, TR-06533 Bilkent, Turkey Bilkent Univ Bilkent Turkey TR-06533 Dept Phys, TR-06533 Bilkent, Turkey Univ Nevada, Dept Chem, Reno, NV 89557 USA Univ Nevada Reno NV USA 89557Univ Nevada, Dept Chem, Reno, NV 89557 USA
Titolo Testata:
PHYSICAL REVIEW B
fascicolo: 15, volume: 62, anno: 2000,
pagine: 10558 - 10564
SICI:
0163-1829(20001015)62:15<10558:RDMATP>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
VIBRATIONAL-ENERGY RELAXATION; ATOMIC-SCALE FRICTION; SLIDING FRICTION; PHASE RELAXATION; SURFACES; CO; DYNAMICS; PT(111); SOLIDS; FORCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Ozpineci, A Bilkent Univ, Dept Phys, TR-06533 Bilkent, Turkey Bilkent Univ Bilkent Turkey TR-06533 R-06533 Bilkent, Turkey
Citazione:
A. Ozpineci et al., "Reduced density matrix approach to phononic dissipation in friction", PHYS REV B, 62(15), 2000, pp. 10558-10564

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 method to study such systems that are coupled to a large environment. In this paper, the time evolution of the reduced density matrix has beenevaluated 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.

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Documento generato il 28/09/20 alle ore 18:44:44