Quantum friction imprints on the geometric phase of a moving atom in front of a dielectric plate

8th International Workshop DICE2016: Spacetime - Matter - Quantum Mechanics

物理学;力学

Lombardo, Fernando C.^1 ; Villar, Paula I.^1

Departamento de Física Juan José Giambiagi, FCEyN UBA, IFIBA CONICET-UBA, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón I, Buenos Aires

1428, Argentina^1

关键词: Decoherence effects;    Dielectric mirrors;    Dielectric plates;    Friction effect;    Frictional effects;    Internal degrees of freedom;    Quantum frictions;    Two-level system;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/880/1/012035/pdf
DOI  :  10.1088/1742-6596/880/1/012035

学科分类：力学，机械学

来源: IOP

【 摘 要 】

We compute the non-unitary geometric phase for the moving atom under the presence of the vacuum field and a dielectric mirror, analytically and numerically. We consider the atom (represented by a two-level system) moving in front of a dielectric plate, and study how decoherence of the particle's internal degrees of freedom can be found in the corrections to the geometric phase accumulated by the atom. We consider the particle to follow a classical, macroscopically-fixed trajectory and by integrating over the vacuum field and the microscopic degrees of freedom of the plate we may calculate friction effects. We find a velocity dependance in the correction to the unitary geometric phase due to quantum frictional effects. We also show in which cases decoherence effects could, in principle, be controlled in order to perform a measurement of the geometric phase using standard interferometry procedures.