Dark states of dressed Bose-Einstein condensates

TL;DR

This paper introduces a novel system combining dressed Bose-Einstein condensates and dark states to generate entanglement between matter and optical waves, enabling control of macroscopic quantum states through microscopic optical modes.

Contribution

It presents a new method to create quantum entanglement between matter and light using dressed condensates and dark states, bridging microscopic and macroscopic quantum control.

Findings

Achieved entanglement between two matter waves and two optical waves.

Demonstrated control of macroscopic quantum states via a single photon.

Proposed a system for influencing macroscopic quantum behavior with microscopic optical modes.

Abstract

We combine the ideas of dressed Bose-Einstein condensates, where an intracavity optical field allows one to design coupled, multicomponent condensates, and of dark states of quantum systems, to generate a full quantum entanglement between two matter waves and two optical waves. While the matter waves are macroscopically populated, the two optical modes share a single photon. As such, this system offers a way to influence the behaviour of a macroscopic quantum system via a microscopic ``knob''.