Gravity-induced entanglement in optomechanical systems

Understand

We investigate the phenomenon of gravity-induced entanglement in optomechanical systems.

• Assuming photon number conservation and the Newtonian potential expanded up to the quadratic order of the oscillator positions, we exactly solve the dynamics of the optomehcanical systems.
• Then, we find that the phase difference due to the Newtonian gravity leads to the large entanglement of photons in separated cavities.
• We clarify the generating mechanism of large gravity-induced entanglements in optomechanical systems in an exact manner.