Tunable lattice Induced Opacity in atom-lattice interaction

TL;DR

This paper demonstrates how a two-dimensional atomic lattice can control matter wave transmission, enabling tunable opacity, a matter wave transistor, and applications like wave splitting and cavity formation.

Contribution

It introduces a lattice-induced opacity mechanism in atom-lattice interactions and proposes a scheme for a matter wave transistor based on controllable transmission.

Findings

Transmission can be tuned from zero to one by adjusting scattering length.

A matter wave cavity can be formed with two lattice planes at zero transmission.

The lattice acts as a beam splitter and wave plate at higher energies.

Abstract

A lattice-induced opacity is identified in the scattering process of a normally-incident matter wave from a two dimensional lattice of atoms. This system can be treated as an analogue of a confinement induced resonance. Specifically by modifying the s-wave scattering length between atoms in the incident matter wave and the lattice-confined atoms, the transmission of the matter wave can be tuned controllably from zero to one. Based on this, we propose a possible scheme for a matter wave transistor. When the transmission of the matter wave is tuned to zero, a matter wave cavity can be formed by placing two such lattice planes of atoms parallel to one another. At higher kinetic energies, the two dimensional lattice of atoms can also serve as a matter wave beam splitter and a wave plate.