Program

O.1 -- Oral, NCTP-41

Date: Monday, 1 August 2016

Time: 10h30 - 10h50

Atom-atom and atom-body dispersion potential in a cylindrical system

Nguyen Dung Chinh (1), Ho Trung Dung (2)

(1) Theoretical Physics Research Group, Ton Duc Thang University, 19 Nguyen Huu Tho St., District 7, Ho Chi Minh city (2) Faculty of Applied Sciences, Ton Duc Thang University, 19 Nguyen Huu Tho St., District 7, Ho Chi Minh city, Vietnam

Atom-atom and atom-body dispersion interaction is influenced by the presence of macroscopic bodies nearby. By suitably manipulating the macroscopic bodies, one can efficiently control the dispersion interaction, leading to potential applications in fields as diverge as biologically based electronics and methane gas extraction from shale-gas systems. Here we consider the atom-atom and atom-body dispersion interaction in the presence of a cylindrical waveguide, focusing on the effects of the atomic dipole orientations and the finite length of the waveguides. In particular, in the case of atoms having radial dipole moments and being located outside a waveguide, the interatomic dispersion interaction is found to be strongly enhanced as compared with that in free space. Results for a perfectly reflecting wall and walls made of a conductor (gold) and a dielectric (undoped silicon) are compared. It is shown that though the perfectly reflecting waveguide model can predict qualitatively correctly the main features of the interatomic dispersion interaction, taking into account realistic permittivities is important because the difference can amount to a few orders of magnitudes.

Presenter: Nguyen Dung Chinh