Analog of Electromagnetically Induced Transparency Effect for Two Nano/Micro-mechanical Resonators Coupled With Spin Ensemble

TL;DR

This paper demonstrates an analog of electromagnetically induced transparency (EIT) in a hybrid system of two nano-mechanical resonators coupled with spin ensembles, enabling quantum information transfer and slow light effects.

Contribution

It introduces a novel hybrid nano-mechanical system exhibiting EIT-like phenomena, with potential applications in quantum networks and information processing.

Findings

Double-EIT phenomenon observed in large N limit

Group velocity significantly reduced in absorption windows

System acts as a quantum transducer for NAMR quantum information

Abstract

We study a hybrid nano-mechanical system coupled to a spin ensemble as a quantum simulator to favor a quantum interference effect, the electromagnetically induced transparency (EIT). This system consists of two nano-mechanical resonators (NAMRs), each of which coupled to a nuclear spin ensemble. It could be regarded as a crucial element in the quantum network of NAMR arrays coupled to spin ensembles. Here, the nuclear spin ensembles behave as a long-lived transducer to store and transfer the NAMRs' quantum information. This system shows the analog of EIT effect under the driving of a probe microwave field. The double-EIT phenomenon emerges in the large $N$ (the number of the nuclei) limit with low excitation approximation, because the interactions between the spin ensemble and the two NAMRs are reduced to the coupling of three harmonic oscillators. Furthermore, the group velocity is reduced in the two absorption windows.