Dark states of atomic ensembles

TL;DR

This paper proposes a method to prepare atomic ensemble dark states using photon pumping and draining in a cavity with two atoms, leveraging energy level splitting to achieve high-probability dark state production.

Contribution

It introduces a novel scheme for dark state preparation involving photon pumping and energy level manipulation, supported by experimental design and computer simulations.

Findings

Dark state yield is proportional to energy level splitting.

The proposed cycle can produce dark states with high probability.

Simulation results support the feasibility of the method.

Abstract

Ensemble of identical two level atoms in dark state neither adsorbs nor emits photons due to destructive interference. It can be used for the source of energy for nano-devices. In Tavis-Cummings cavity the change of light-atom coupling cannot destroy the dark state. We propose the method of dark states preparation based on photon pumping and drain from the optical cavity with two atoms, one from which has Stark or Zeeman splitting of energy levels. This splitting is removed before photon drain from the cavity. The dark state yield after one such cycle has the order of energy level splitting. We show the scheme of the experiment, in which such cycles repeat until the dark state is produced with high probability and the results of computer simulation.