Room-Temperature Steady-State Entanglement in a Four-Mode Optomechanical System

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 Bogoliubovmode-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.

Enhancement of quantum synchronization in optomechanical system by modulating the couplings

“…Consequently, this work has rapidly met the increasing interest of quantum synchronization in many kinds of systems, such as optomechanics [6,7], cavity quantum electrodynamics [8,9], atomic ensembles [10][11][12], van der Pol (VdP) oscillators [13][14][15][16][17], Bose-Einstein condensation [18], superconducting circuit systems [19,20], and so on. Moreover, the schemes of realizing quantum synchronization are also proposed both expermantally [21][22][23][24][25] and theoretically [26][27][28][29][30][31]. Remarkably, a lot of new researches and achievements have emerged recently [32][33][34].…”