Room-temperature steady-state entanglement in a four-mode optomechanical system

TL;DR

This paper demonstrates the possibility of achieving steady-state entanglement at room temperature in a four-mode optomechanical system, highlighting the role of quantum-mechanics-free subspaces and thermal noise considerations.

Contribution

It introduces a novel scheme for room-temperature steady-state entanglement in a four-mode optomechanical system, surpassing explanations based on Bogoliubov modes.

Findings

Significant steady-state entanglement achievable at room temperature

Equal coupling strengths are crucial for entanglement generation

Quantum-mechanics-free subspace plays a key role in thermal noise resilience

Abstract

Stationary entanglement in a four-mode optomechanical system, especially under roomtemperature, is discussed. In this scheme, when the coupling strengths between the two target modes and the mechanical resonator are equal, the results cannot be explained by the Bogoliubov mode- based scheme. This is related to the idea of quantum-mechanics-free subspace, which plays an important role when the thermal noise of the mechanical modes is considered. Significantly prominent steady-state entanglement can be available under room-temperature.