Interference Effects in Potential-Wells

TL;DR

This paper introduces a potential-well array interferometer that demonstrates complex quantum effects such as Hong-Ou-Mandel interference, Bell inequality violations, and interaction-induced phenomena like fermionization and self-trapping.

Contribution

It presents a novel interferometer design using potential wells and explores its ability to exhibit multiple quantum interference effects and interaction phenomena.

Findings

Demonstration of generalized Hong-Ou-Mandel effects

Observation of Bell inequality violations

Identification of interaction-induced phenomena like fermionization

Abstract

We propose using an array of potential wells as an interferometer, in which the beam splitters are provided by tunneling during an appropriate time through the barrier between wells. This arrangement allows demonstration of generalized Hong-Ou-Mandel effects with multiple particles traversing one or several beam splitters. Other interferometer effects can occur, including a violation of the Bell-Clauser-Horne-Shimony-Holt form of the Bell inequality. With interactions, one sees various effects including so-called fermionization, collective tunneling, and self-trapping.