2019/01/31 by Ludmila Viotti, M. Belén Farías, Paula I. Villar +1
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Classical mechanics #Dissipative system #Mechanical and Optical Resonators #Path integral formulation #Physics #Quantum #Quantum Electrodynamics and Casimir Effect #Quantum decoherence #Quantum dissipation #Quantum fluctuation #Quantum mechanics #Quantum tunnelling #Thermal #Thermodynamics #cond-mat.other #hep-ph #quant-ph
paper · pdf · doi:10.1103/physrevd.99.105005
published as Phys. Rev. D 99, 105005 (2019) · minor changes. Version to appear in Phys. Rev. D
arxiv created 2019/04/09 · openalex publication_date 2019/05/13 · arxiv updated 2019/05/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.