Control of Fano resonances and slow light using Bose-Einstein condensates in a nanocavity

TL;DR

This paper demonstrates how Bose-Einstein condensates in a nanocavity can be used to control Fano resonances and slow light effects, with potential applications in quantum optics and photonics.

Contribution

It introduces a novel method to manipulate Fano resonances and slow light using BEC in a nanocavity, highlighting control via cavity field intensity and atomic interactions.

Findings

Fano resonances can be coherently controlled in BEC-nanocavity systems.

Electromagnetically induced transparency is tunable through system parameters.

Enhanced slow light effects are achievable with current technology.

Abstract

In this study, a standing wave in an optical nanocavity with Bose-Einstein condensate (BEC) constitutes a one-dimensional optical lattice potential in the presence of a finite two bodies atomic interaction. We report that the interaction of a BEC with a standing field in an optical cavity coherently evolves to exhibit Fano resonances in the output field at the probe frequency. The behavior of the reported resonance shows an excellent compatibility with the original formulation of asymmetric resonance as discovered by Fano [U. Fano, Phys. Rev. 124, 1866 (1961)]. Based on our analytical and numerical results, we find that the Fano resonances and subsequently electromagnetically induced transparency of the probe pulse can be controlled through the intensity of the cavity standing wave field and the strength of the atom-atom interaction in the BEC. In addition, enhancement of the slow light effect by the strength of the atom-atom interaction and its robustness against the condensate fluctuations are realizable using presently available technology.