info:eu-repo/semantics/article
Thermal corrections to quantum friction and decoherence: A closed-time-path approach to atom-surface interaction
Fecha
2019-05-15Registro en:
Viotti, Ludmila; Farias, María Belén; Villar, Paula Ines; Lombardo, Fernando Cesar; Thermal corrections to quantum friction and decoherence: A closed-time-path approach to atom-surface interaction; American Physical Society; Physical Review D; 99; 10; 15-5-2019; 1-12
2470-0029
2470-0010
CONICET Digital
CONICET
Autor
Viotti, Ludmila
Farias, María Belén
Villar, Paula Ines
Lombardo, Fernando Cesar
Resumen
In this paper we study the dissipative effects and decoherence induced on a particle moving at constant speed in front of a dielectric plate in quantum vacuum, developing a closed-time-path (CTP) integral formulation in order to account for the corrections to these phenomena generated by finite temperatures. We compute the frictional force of the moving particle and find that it contains two different contributions: a pure quantum term due to quantum fluctuations (even present at vanishing temperatures) and a temperature-dependent component generated by thermal fluctuations (the bigger the contribution, the higher the temperature). We further estimate the decoherence timescale for the internal degree of freedom of the quantum particle. As expected, decoherence time is reduced by temperature; however, this feature is stronger for large velocities and for resonant situations. When the particle approaches relativistic speed, decoherence time becomes independent of temperature. The finite temperature corrections to the force or even in the decoherence timescale could be used to track traces of quantum friction through the study of the velocity dependence since the sole evidence of this dependence provides an indirect testimony of the existence of a quantum frictional force.